CN101172338A - Reversible valve assembly for a pneumatic tool - Google Patents

Abstract

The present invention relates to a pneumatic rotary tool comprises a housing, a square drive output member supported by the housing for rotational movement, and a pneumatic motor disposed in the housing for driving rotation of the square drive. A valve is disposed in the housing for rotary movement between a first position in which pressurized air powers the motor in a forward direction and a second position in which pressurized air powers the motor in a reverse direction. An actuator supported on the housing for translational movement is connected to the valve by a lost motion connection system. The lost motion connection system comprises first and second connector elements that are engaged for generally conjoint movement in a first direction and for relative sliding movement in a second direction generally perpendicular to the first direction.

Description

Be used for air tool reversible valve assembly

Technical field

The present invention relates generally to Pneumatic rotary tools, relate more specifically to a kind of Pneumatic rotary tools with reversible valve (reversible) assembly, described reversible valve assembly is used to control the direction by the rotation output of the direction of the air-flow of described instrument and described instrument.

Background technology

Pneumatic rotary tools is used in usually wishes along rotating tightening member such as bolt or nut with under the occasion that it is tightened or unscrews forward or backwards.Pneumatic rotary tools is favourable, but because their quick rotation tightening members are to tighten or to unscrew tightening member.Some pneumatic tool can be passed to securing member with a large amount of torques.In the commercial Application that auto repair and securing member are difficult to unscrew or a large amount of torques of needs tighten, especially wish so.

Pneumatic rotary tools generally includes size and is set at the output block (for example groove seat) that engages with securing member.Forced air flows through described instrument and drives air motor, air motor and then driver slot seat.Air flows to described motor by one in two paths usually.When air flow through first path, its direction along forward (be generally and tighten) drove described motor.When air flow through alternate path, its direction along reverse (be generally and unscrew) drove described motor.

Use valve with air-flow guiding first or alternate path.Usually, described valve comprises air guide is expected the direction passage of path and linked to each other with described valve described direction passage is moved on to the arm of desired locations.In many instruments, described arm is for example protruding along side direction from described instrument one by one above the trigger one by one in a position.Perhaps, can use a pair of arm to move described valve.At U.S. patent No.5, among 199,460 (Geiger), for example, air flows through a tubulose reel and arrives forward supply port or oppositely supply with port.One pinion-and-rack system rotates described reel and its port with expectation is aimed at.Two arms (tooth bar) are positioned at the opposite side of (gear) of reel, thereby the arm of expectation can be pressed in the housing so that reel rotates to desired locations.When an arm was pressed into housing, relative arm shifted out housing along direction backward.After this arm externally can be pressed into housing to change the position of reel.

The defective of the valve of current use is, the structure (for example arm) that is used to valve is moved is usually protruding from instrument, makes it be easy to during operation by mistake be contacted or produce motion.Therefore, be desirable to provide a kind of pneumatic tool with simple valve constitution, it remains on the operating position of expectation in normal working conditions securely.

Summary of the invention

The present invention relates to a kind of Pneumatic rotary tools.This instrument generally comprises housing, by the supporting of this housing with the output block that rotates with respect to this housing and be arranged in the described housing and may be operably coupled to described output block to drive the air motor of this output block rotation.Be provided with an inlet in described housing, this inlet is used to admit the forced air from pressurized air source, to supply with power to described motor.Path in the described housing is directed to described air motor with forced air from described inlet.One valve with longitudinal axis is arranged in the described path to be rotated a kind of motion in motion and the translational motion between the primary importance and the second place, forced air in the described path of described primary importance is directed into along forward and supplies with power to described air motor, and the forced air in the described path of the described second place is directed into along oppositely supplying with power to described air motor.Described instrument also comprises the actuator that is bearing on the described housing, and this actuator is used for being rotated with respect to described housing the another kind motion of motion and translational motion.One empty moving (lost motion) connected system makes described actuator and valve interconnection.This connected system comprises first connecting element and second connecting element, and these two connecting elements engage with along first direction associated movement and do to slide relatively along the second direction that is approximately perpendicular to described first direction roughly.

The part of further feature of the present invention is conspicuous, and a part will be pointed out hereinafter.

Description of drawings

Fig. 1 is the side view according to the Pneumatic rotary tools of first embodiment of the invention;

Fig. 2 is the local amplification rearview of described instrument;

Fig. 3 is the longitudinal section of described instrument;

Fig. 4 is the perspective view of the valve module of described instrument;

Fig. 5 is the decomposition diagram of Fig. 4;

Fig. 6 is the perspective view of first valve member of valve module;

Fig. 7 is the front view of second valve member of valve module;

Fig. 8 is the cutaway view of second valve module cut open of the line 8-8 along Fig. 7;

Fig. 9 A is the partial front elevation view of described instrument, and wherein the part of the pin of valve module and projection is shown in broken lines, and valve module is in the reverse operation position;

Fig. 9 B is the partial rear view of described instrument, and wherein the part of end cap and valve module is broken away, and valve module is in the reverse operation position;

Figure 10 A is the view that valve module is in Fig. 9 A of forward operating position;

Figure 10 B is the view that valve module is in Fig. 9 B of forward operating position;

Figure 11 is the air tool partial rear view according to second embodiment of the invention;

Figure 12 is the air tool longitudinal section according to second embodiment of the invention;

Figure 13 is the valve module of instrument of Figure 11 and the perspective view of actuator;

Figure 14 is the decomposition diagram of Figure 13;

Figure 15 A is the partial rear view of the instrument of Figure 11, and wherein valve module is positioned to the forward operating position corresponding to valve module;

Figure 15 B is the partial rear view of Figure 15 A, and wherein end cap and valve module are partly cut open;

Figure 16 A is the view of Figure 15 A, and wherein valve module is positioned to the reverse operation position corresponding to valve module;

Figure 16 B is the partial view of Figure 16 A, and wherein end cap and valve module are partly cut open;

Figure 17 is the perspective view of pneumatic rotary drilling according to another embodiment of the present invention;

Figure 18 is the cutaway view along the length intercepting of described brill;

Figure 19 is the partial enlarged view of Figure 18;

Figure 20 is that wherein a reversible valve assembly is configured to guide air to drive air motor in the counterclockwise direction along the cutaway view that comprises the planar interception of the line 20-20 among Figure 18;

Figure 21 is similar to Figure 20, and wherein reversible valve assembly is configured to guide air to drive air motor along clockwise direction;

Figure 22 is the amplification decomposition diagram of reversible valve assembly; And

Figure 23 is the enlarged perspective of reversible valve assembly.

In each view of accompanying drawing, corresponding Reference numeral is represented corresponding parts.

The specific embodiment

Referring now to accompanying drawing, Fig. 1 especially, first embodiment of Pneumatic rotary tools of the present invention totally represents with 1.In the drawings, instrument 1 be depicted as pneumatic impact spanner and roughly comprise the housing (totally representing) with axis 4, the bell housing 5 that is positioned at housing 3 the place aheads with 3, the output block 7 that stretches out forward from bell housing 5 and the end cap 9 that is installed in housing 3 rear portions.Output block 7 by housing 3 supporting to rotate with respect to housing around axis 4.Output block 7 is depicted as the square drive part, but also can be configured as difformity within the scope of the invention.Four threaded fasteners 10 for example bolt extend through end cap 9 and housing 3 and advance bell housing 5 by screwed, thereby the parts of instrument are tightened together.Also available within the scope of the invention different mode tightens together tool component, for example adopts different securing members.Instrument 1 also comprises the handle 11 that extends from housing 3 downwards, thereby allows user's grasping and keep instrument 1 securely.For the purpose of the present invention, bell housing 5, end cap 9 and handle 11 can all be regarded the part of housing 3 as.Trigger 13 stretches out with starting instrument 1 from the place ahead of handle 11, and in the bottom of handle 11, be limited with air inlet 15, with the forced air of admittance from the pressurized air source (not shown), thereby forced air is supplied to instrument 1, this is the traditional method in this area.

Referring now to Fig. 2, instrument 1 comprises the torque selector 17 that is installed on the end cap 9 and can rotates the torque of control tool 1 to flow by adjusting compressed air in this end cap.In the embodiment shown, torque selector 17 rotates between four discrete locations corresponding to four torque settings in end cap 9.The functional mechanism of torque selector 17 is not described further at this, but in relevant total U.S. Patent No. 6,796,386 people such as () Izumisawa, has a detailed description.The torque selector is not to be that realization is essential to the invention, also can use within the scope of the invention and have heteroid torque selector (for example referring to Figure 11 that second embodiment of the invention is shown, wherein the exterior section of torque selector 117 has different shapes).

With reference to Fig. 3, contiguous air inlet 15 is limited with exhaust outlet 19 in the bottom of handle 11.Exhaust outlet 19 comprises and is used for when instrument is left in exhaust exhaust diversion user and prevents that foreign substance from entering the diffuser 21 of exhaust outlet 19.

In Fig. 3,9B and 10B, totally represent with line A by the air-flow of the path in the housing 3 of instrument 1.Along the path of line A, forced air at first is received in the instrument 1 by air inlet 15, and as known in the art, air inlet 15 is more specifically limited by the accessory 23 that is used for instrument 1 is connected to air hose and pressurized air source (not shown).After air inlet 15, air is by the inclined valve 25 by the spring bias voltage, and this inclined valve can be opened by pulls trigger 13.The concrete structure and the operation of inclined valve 25 are not discussed, because its design is known herein in association area.Air flows to and is positioned at the selector valve assembly that overall usefulness 27 that housing 3 just in time is in trigger 13 tops is represented then.

Shown in Fig. 4-8 is more detailed, selector valve assembly 27 comprises that (difference) has the elongated actuator pin 34 of the first and second end 34a, 34b and longitudinal axis 35, this actuator pin may be operably coupled to first valve member (totally representing with 31) by axle 36, so that this valve member rotatably moves in second valve member (totally representing with 33), described second valve member is fix in position (Fig. 3) in the rear end of instrument 1.First valve member 31, second valve member 33 and axle 36 can broadly be called " valve ", and actuator pin 34 can broadly be called " actuator ".The axle 36 projection 36a at the groove 37 that is arranged in pin 34 (broadly, handle) locate to be connected to pin 34 (described projection and groove can broadly be called " connecting element "), thereby the longitudinal axis 38 (Fig. 5) of axle 36 is approximately perpendicular to the longitudinal axis 35 of pin 34.Can see better that as reference Fig. 9 A and 10A projection 36a is provided with and the axis 38 of off-axis 36 thus prejudicially.Groove 37 roughly is positioned at longitudinal axis 35 belows of pin 34, thereby pin makes axle 36 rotate around axis 38 along moving of its longitudinal axis 35 directions.With regard to the cross stream component that rotatablely moves of axis 38, projection 36A and groove 37 and pin 34 move jointly with regard to projection 36A.The vertical length of groove 37 allows projection 36A to slide in groove with respect to pin 34, thereby with regard to the vertical component that rotatablely moves of projection, groove and projection do not move jointly.Like this, projection 36A and groove 37 form sky and are dynamically connected in first embodiment.The air openings 39 (Fig. 6) of axle 36 in first valve member 31 locates to be connected to this first valve member.Axle 36 half-cylindrical fingers 41 is assemblied in the air openings 39, makes the plane surface of this fingers abut on the bottom surface of smooth deflector 45 of first valve member 31 (also seeing Fig. 9 B and 10B).Fingers 41 is less than air openings 39, so air still can flow through from this opening.Opening 42 in the fingers 41 admits the cylindrical extension 44 (Fig. 6) of first valve member 31 so that fingers is fastened on this valve member.Connect by this, rotatablely moving of axle 36 rotated first valve member 31 jointly.Within the scope of the invention, first valve member and axle 36 can form parts.

As shown in Figure 3, actuator pin 34 roughly is positioned at the top of trigger 13 so that approaching.Pin 34 extends through the passage 43 that runs through housing 3, thereby protects it can by mistake not contacted during operation.In addition with reference to Fig. 9 A-10B, pin 34 can move between the primary importance (Fig. 9 A) and the second place (Figure 10 A) in passage 43, protruding at described primary importance first end 34a from described passage, protruding at described second place the second end 34b from described passage.When pin 34 was in the first position, valve module 27 was in reverse operation position (Fig. 9 B).The smooth deflector 45 of first valve member 31 in the counterclockwise direction (as looking) from Fig. 9 B around axis 38 rotation, thereby the air openings 39 by first valve member 31 enters first side ports 47 that the air of second valve member 33 is conducted through second valve member 33.When pin 34 was in the second place, valve module 27 was in forward operating position (Figure 10 B).Deflector 45 along clockwise direction (as looking) from Figure 10 B around axis 38 rotation, thereby enter second side ports 49 of diversed plate 45 guiding of air of second valve member 33 by second valve member 33.Second valve member 33 comprises additional top port 50, and it is provided for the passage that leaves from the exhaust of motor.Should be pointed out that in Fig. 3 first valve member 31 is depicted as the neutral position that is between reverse operation position and the forward operating position.

The path A of instrument 1 is passed through in continuation along the air among Fig. 3,9B and the 10B, one denier air is by selector valve assembly 27, and then air flows through first air duct 53 according to the direction position of first valve member 31 and deflector 45 or second air duct 55 arrives totally with the 57 pneumatic rotary motors of representing (Fig. 3).In Fig. 9 B, air is conducted through first side ports 47 and first passage 53 and flows through torque selector 17.Air enters motor 57 to drive this motor along the reverse operation direction then, finally as output block that people drive apparently 7 rotations.In Figure 10 B, air is conducted through second side ports 49 and second channel 55 and flows directly to motor 57 to drive this motor along the forward operative orientation.

As shown in Figure 3, pneumatic rotary motor 57 is the types known to those skilled in the art, comprises rotor 59 and a plurality of blade 61.In U.S. Patent No. 6,796, describe similar pneumatic rotary motor in detail in 386.Air enters motor 57 and expands and backup blade 61, blade 61 and then make rotor 59 rotations.One bolster 63 extends from the rear end of rotor 59, and a splined shaft 65 extends from the front end of rotor 59.Bolster 63 be assemblied in be installed on motor 57 rear end cap 67b in ball bearing 60 in.Splined shaft 65 has splined section 65a and smooth part 65b.Smooth part 65b is assemblied in the ball bearing 60 in the drive end bearing bracket 67a that is installed on motor 57, and spline parts 65a extends beyond drive end bearing bracket 67a and engage with impact clutch that the overall usefulness 69 in being contained in bell housing 5 is represented.Splined section 65a is assemblied in the slotted eye 71 of impact clutch 69 to allow associated movement.The splined shaft 65 of rotor 59 and bolster 63 roughly extend along the longitudinal axis 4 of housing 3, and two groups of ball bearings 60 allow rotor 59 to rotate freely in motor 57.

When air flow through air motor 57, it drove splined shaft 65, splined shaft 65 and then driving impact clutch 69 and output block 7.Known in this area, impact clutch 69 can convert the high speed rotating of motor 57 to act on the output block 7 discrete high torque (HT) impact moment.Because it is limited on the duration that high torque (HT) is impacted, so the operator can maintain instrument 1 applying than the bigger moment of the moment that may apply under the situation of high torque (HT) continuous action to output block when.Percussion tool for example needs tightening of high torque (HT) setting or unscrews in the securing member in high torque applications is useful.Impact clutch 69 is types known in those skilled in the art, is not described further at this.

Discharge by the port 50 of the outlet opening 73 in the motor and second valve member 33 by the air that motor 57 consumes.The air that is consumed is conducted through the perforate (not shown) in the housing 3 and arrives exhaust outlet 19 in the handle 11 then, to remove from instrument 1.This is conventional way in this area.

Figure 11-16B illustrates the instrument according to second embodiment of the invention.This instrument totally represents with 101, and this instrument (the corresponding parts of parts of the instrument 1 of Fig. 1-10B) add that with identical Reference numeral " 100 " represent with first embodiment.

Shown in Figure 11 and 12, the instrument 101 of this embodiment is substantially similar to the instrument 1 of first embodiment.But in this embodiment, selector valve assembly 181 (Figure 12-14) is revised to some extent.Selector valve assembly 181 roughly is positioned at end cap 109 belows of the instrument 101 at instrument 101 rear portions.In addition with reference to Figure 13 and 14, selector valve assembly 181 comprises two button 187a, 187b that are provided with abreast side by side, they may be operably coupled to first valve member (totally representing with 131), so that rotatably move in cylindrical shape second valve member (totally representing with 133) of this valve member in being fixed in housing 103 (Figure 12).First valve member 131 and second valve member 133 can broadly be called " valve ", and button 187a, 187b can broadly be called " actuator ".Button 187a, 187b are by pin 189 (broadly, " prodger ") be connected to the first type surface 188 of first valve member 131, pin 189 links to each other with first valve member and the opening 191 from first valve member 131 stretches out and enter groove 193 among corresponding button 187a, the 187b.Groove 193 allows button 187a, 187b vertically to move with respect to housing 103, and the horizontal movement of a small amount of by pin 189 produces rotatablely moving of first valve member 131, and described horizontal movement is dynamically connected via sky first valve member 131 is rotated.Will be appreciated that, also can use the slip sky of other type to be dynamically connected within the scope of the invention.Button 187a, 187b move along the direction that is parallel to each other substantially, and their direction of motion is basically perpendicular to the longitudinal axis 104 of housing 103.

Shown in Figure 15 A and 16A, button 187a, the 187b of valve module 181 vertically is positioned at end cap 109 belows, thereby protects them can not contacted unintentionally during operation.The part that is arranged in end cap 109 back of button 187a, 187b and second valve member 133 dots at these figure.Button 187a, 187b can vertically move, thereby the first button 187a or the second button 187b reach end cap 109 belows, and another button is located substantially on the back of end cap simultaneously.In Figure 15 A and 15B, the first button 187a is in end cap 109 belows, and valve module 181 is in the forward operating position.The deflector 145 of first valve member 131 of assembly 181 (being similar to the deflector 45 of first embodiment) is rotated counterclockwise the angles of about 45 degree from horizontal level, thus the air that the air openings (being similar to the air openings 39 of first valve member 31 of first embodiment) by first valve member 131 enters second valve member 133 under the effect of deflector deflection by second valve member first side ports 147 and arrive first air duct 153 and lead to motor 157 (Figure 15 B).Different with first embodiment, this configuration causes the forward work of instrument but not reverse operation, and this is because the layout difference of air motor (not shown).For the work with instrument 101 changes over the reverse operation position, the first button 187a upwards to be pressed, this rotates the valve member 131 of winning and makes the second button 187b shift out housing 103 (Figure 16 A) downwards.Deflector 145 turns clockwise and arrives the angles of about 45 degree by horizontal level, thus the air deflection that enters second valve member 133 by second valve member second side ports 149 and arrive second air duct 155 (Figure 16 B).By the second button 187b is upwards pushed away, instrument can be configured to forward work once more.

Still in this embodiment, as shown in figure 12, discharge towards the bottom of motor 157 by outlet opening 195 from the air that motor 157 consumes.The air that is consumed is conducted through perforate (not shown) in the housing 103 and arrives exhaust outlet 119 in the handle 111 to remove from instrument 101 then.In all others, the work of the instrument 101 of this embodiment is described identical with instrument 1 about first embodiment basically.

With reference to Figure 17-23, another embodiment of the present invention is totally with the 201 pneumatic rotary drillings of representing.This awl comprises the housing that overall usefulness 203 is represented, this housing comprises the handle 205 for user's grasping and operation awl 201.Totally with 207 driving mechanisms of representing, this driving mechanism comprises air motor 209 to the upper support of housing 203, and this air motor is used to make the output block 213 (for example drill chuck) that extends forward from the top of housing to rotate around rotation A1.Output block 213 has the hexagon cavity 214 that is used to admit the drill chuck (not shown).As the instrument of the foregoing description, the air motor 209 of pneumatic drill 201 is suitable for turning clockwise so that output block 213 forwards or turn clockwise, perhaps be rotated counterclockwise so that output block oppositely or be rotated counterclockwise.Make motor rotation and be well known in the art, do not elaborate at this with the driving mechanism 207 that output block is passed in rotation.

Air motor 209 is driven by forced air, and described forced air is delivered to air motor from the source of pressurised fluid (not shown) by the air duct that the array of fluid the housing 203 connects.Access road 215 in the handle 205 can be by being connected to pressurized air source on the joint 217 that the flexible pipe (not shown) is fixed to the handle bottom.With reference to Figure 18, in structure and operation all and the similar inclined valve 219 of the inclined valve of previous embodiment (generally expression) be arranged between the remaining air passage in access road 215 and the awl 201.Also can use other suitable valve within the scope of the invention.The plunger 221 that slave flipflop 223 extends back activates the unlatching of inclined valve 219.Depress (pulling) trigger 223 plunger 221 is moved backward point-blank along its longitudinal axis A2, make plunger free end contact valve 219 handle 227 and force valve to leave its valve seat 229 and open valve, thereby forced air flows to air motor 209.

With reference to Figure 18-23, be provided with the reversible valve assembly that overall usefulness 233 is represented in the downstream of inclined valve 219 and the upstream of air motor 209, this reversible valve assembly be used for will enter from access road 215 air of valve import forward drive air duct 235A with CD-ROM drive motor (Figure 21) along clockwise direction, or import reverse drive air duct 235B with CD-ROM drive motor (Figure 20) in the counterclockwise direction.Illustrate well as Figure 18 and 22, reversible valve assembly 233 comprises being received in and is roughly columnar rotor 237 (broadly, valve member) in the tubular shell 239 (broadly, valve body) that sleeve pipe 239 is received in the housing 203 regularly.Plunger 221 (Figure 18) is received in the axially open 241 of rotor 237 slidably, thereby the free end border of plunger extends through the rear portion entry port 243 in rotor and the sleeve pipe 239, engages with the handle 227 of inclined valve 219 at the free end of this entry port place, rear portion plunger.In view of following reason, rotor 237 can be around the rotation A3 rotation that roughly overlaps with the longitudinal axis A2 of plunger 221.O shape circle 245 (Figure 19) that are received in the circumferential slot of the outer surface that is arranged in plunger 221 engage to prevent that air from spilling from valve 233 by axial passage hermetically with the inner surface of the qualification axial passage 241 of rotor 237.Like this, plunger 221 seals and is sliding engaged to rotor 237.Another O shape circle 246 (Figure 18 and 19) that admit at the rear portion of annular sleeve 239 engage to prevent that air from leaking between sleeve pipe and housing hermetically with housing 203.

With reference to Figure 19, the rear portion 247 of rotor 237 engages hermetically with the inner surface of sleeve pipe 239, thereby can't flow through between rotor and sleeve pipe from the forced air that entry port 243 enters valve 233.One groove 249 (Figure 19-23) extends along the top of rotor in the vertical from the rear end of rotor 237.As mentioned below, the rotation of the selectivity of rotor 237 is radially aimed at groove 249 respectively with first and second one of discharging among port 251A, the 251B in the sleeve pipe 239.First discharges port 251A is connected with forward drive passage 235A fluid, and the second discharge port 251B is connected to driving passage 235B fluid with the back.Radially discharge port 251A to punctual (Figure 21) with first when rotor slot 249, valve 235 is in the forward drive configuration, wherein first discharges that port is opened and second discharges port 251B and close.In the forward drive configuration, the forced air that enters valve 235 by entry port 243 only is directed to forward drive air duct 235A with CD-ROM drive motor along clockwise direction, and then drives output block 213.Similarly, radially discharge port 251B to punctual (Figure 20) with second when rotor slot 249, valve 235 is in the reverse drive configuration, and second discharges that port is opened and first discharge port 251A and close.In the reverse drive configuration, the forced air that enters valve 235 by entry port 243 only is directed to reverse drive air duct 235B.

The selectivity rotation that valve 233 disposes between its forward drive configuration and its reverse drive configuration of making of rotor 237 is that linear translation motion by pin or button 255 (broadly, actuator) is activated.Button 255 is roughly shaft-like and roughly is received in slidably in the housing 203 at the rear of trigger 223 in the front portion of handle 205.Button 255 can slide along the linear activation axis A4 (Figure 20 and 21) that is roughly of the rotation A3 that is substantially transverse to (for example being approximately perpendicular to) rotor 237.More specifically, button 255 can be at the right-hand member 257A of this button from the left end 257B of the laterally outwardly directed primary importance of the right side 259A of housing 203 (Figure 21) and this button from moving between the laterally outwardly directed second place of the left side 259B of housing (Figure 20).

With reference to Figure 22 and 23, totally with 263 connected systems of representing, more specifically for the empty system that is dynamically connected may be operably coupled to the rotor 237 of valve 233 with button 255, thereby button causes rotatablely moving of rotor along the linear movement of activation axis A4.Described connected system comprises in the cavity 267 that is fixed on button 255 and is approximately perpendicular to the slide plate 265 that activation axis A4 extends from button down.The handle 271 of connected system 263 extends forward from the front portion 273 of rotor 237 and is received in the groove 275 of slide plate 265.Groove 275 is approximately perpendicular to the vertical extension in activation axis A4 ground from the bottom surface of slide plate 265, and its size and dimension is set the vertically mobile therein or slip of permission handle 271 for.Like this, when slide plate 265 was connected to handle 271, the translational motion of button 255 and slide plate 265 converted the angular movement around its rotation A3 of the angular movement of handle 271 and rotor 237 to.In the embodiment shown, the right-hand member 257A that promotes button 255 makes button slip left can make handle 271 and rotor 237 rotate in the counterclockwise the forward drive position, and the groove 249 in this forward drive position rotor discharges port 251A with first and forward drive air duct 235A radially aims at.On the contrary, the left end 257B that promotes button 255 makes button slip to the right can make rotor 237 deasil rotate to the reverse drive position, and the groove 249 in this reverse drive position rotor discharges port 251B with second and reverse drive air duct 235B aims at.

With reference to Figure 18 and 19, enter air motor 209 and make air motor rotation and after driving driving mechanism 207 the chosen person of air from forward drive air duct 235A and reverse drive air duct 235B, air leaves air motor by the outlet in the motor 279 and enters passing away 281 in the handle 205 of awl 201.Before leaving passing away 281 and entering atmosphere, air flows through the valve 233 that is connected with the passing away fluid.Valve sleeve 239 has the following outlet opening 285B that the last outlet opening 285A that allows air to flow into valve 233 from passing away 281 leaves valve with the permission air and enters passing away again.Mid portion 287 between the upper and lower outlet opening 285A, the 285B that are arranged on sleeve pipe 239 of rotor 237 has the external diameter littler than casing inner diameter, flows into and walks around mid portion and leave by outlet opening down from last outlet opening to allow air.After flowing through valve 233 and entering passing away 281 again, air flows through the diffuser 289 that is positioned at handle 205 bottoms and enters atmosphere.The alternate manner that is used to make exhaust leave air motor also within the scope of the invention.

When introducing the element of the present invention or its preferred embodiment, article " " and " described " are used for expression and have one or more these elements.Term " comprises " and " having " shows it is that the also expression that is included also exists other element except that listed element.

Owing to can make various changes and can not depart from the scope of the present invention, be contained in the above description and illustrate therefore that in the accompanying drawings all the elements all should be interpreted as illustrative and nonrestrictive to above-mentioned form of implementation.

Claims (23)

1. Pneumatic rotary tools comprises:

Housing;

By the output block of described housing supporting to rotate with respect to this housing;

Air motor, this air motor are arranged in the described housing and may be operably coupled to output block, to drive this output block rotation;

Be arranged in the inlet of described housing, this inlet is used to admit the forced air from pressurized air source, to supply with power to described motor;

Be arranged in the path of described housing, this path is used for forced air is directed to described air motor from described inlet;

Valve, this valve has longitudinal axis and is arranged in the described path, between the primary importance and the second place, to be rotated a kind of motion in motion and the translational motion, forced air in the described path of described primary importance is directed into along forward and supplies with power to described air motor, and the forced air in the described path of the described second place is directed into along oppositely supplying with power to described air motor;

Be bearing on the described housing to be rotated the actuator of the another kind motion in motion and the translational motion with respect to described housing;

Make the sky system that is dynamically connected of described actuator and valve interconnection, this connected system comprises first connecting element and second connecting element, and these two connecting elements engage with along first direction associated movement and do to slide relatively along the second direction that is approximately perpendicular to described first direction roughly.

2. Pneumatic rotary tools as claimed in claim 1 is characterized in that, described first connecting element comprises handle, and described second connecting element comprises described handle is received in wherein groove.

3. Pneumatic rotary tools as claimed in claim 2 is characterized in that, described handle is associated with described valve, and described groove is associated with described actuator.

4. Pneumatic rotary tools as claimed in claim 3 is characterized in that, the longitudinal axis that described groove is approximately perpendicular to described valve extends.

5. Pneumatic rotary tools as claimed in claim 3 is characterized in that described valve is mounted to around longitudinal axis and rotates, and described actuator is mounted to does translational motion.

6. Pneumatic rotary tools as claimed in claim 5 is characterized in that, described handle is outstanding vertically from the axial end of described valve, and is provided with prejudicially with respect to the longitudinal axis of described valve.

7. Pneumatic rotary tools as claimed in claim 6 is characterized in that described actuator comprises pin, this pin roughly along described housing laterally and the longitudinal axis that is approximately perpendicular to described valve extend.

8. Pneumatic rotary tools as claimed in claim 7, it is characterized in that, described pin comprises relative first end and the second end, when described motor during along the work of described forward, the first end of described pin reaches described hull outside, when described motor during along described reverse operation, the second end of described pin reaches described hull outside.

9. Pneumatic rotary tools as claimed in claim 1 is characterized in that described actuator comprises first button.

10. Pneumatic rotary tools as claimed in claim 9, it is characterized in that, described actuator also comprises second button, described first button is suitable for making described valve to move to the described second place from described primary importance, and described second button is suitable for making described valve to move to described primary importance from the described second place.

11. Pneumatic rotary tools as claimed in claim 10 is characterized in that, the described sky system of being dynamically connected comprises prodger and the groove that is used for described each button.

12. Pneumatic rotary tools as claimed in claim 11 is characterized in that, described prodger is associated with described valve, and each of described first button and second button all has the groove that is used to admit a corresponding prodger.

13. Pneumatic rotary tools as claimed in claim 10 is characterized in that, described first button and second button are arranged side by side the rear end at described housing.

14. Pneumatic rotary tools as claimed in claim 1, it is characterized in that, described valve comprises and is used for guiding air to flow through the smooth deflector of the valve of described path from described inlet, this deflector guiding air flows along a direction in first direction and the second direction, make described motor along described forward work along described first direction flow air, make described motor along described reverse operation along described second direction moving air.

15. Pneumatic rotary tools as claimed in claim 14, it is characterized in that, described actuator is mounted to does translational motion, and the longitudinal axis that described deflector is mounted to around described valve rotates, and the translational motion of described actuator causes rotatablely moving of described deflector.

16. Pneumatic rotary tools as claimed in claim 1, it is characterized in that, described valve comprises first valve member and second valve member, and described first valve member rotatably is received in described second valve member, to rotate between the described primary importance and the second place.

17. Pneumatic rotary tools as claimed in claim 16 is characterized in that, described valve also comprises the elongated axle that described actuator be may be operably coupled to described first valve member.

18. Pneumatic rotary tools as claimed in claim 17, it is characterized in that, described axle comprises projection, described actuator comprises groove, described groove admits described projection to be transmitted into rotatablely moving of described axle with the translational motion with described actuator, and described axle also comprises the fingers that engages with described first valve member, so that described axle rotates jointly with described first valve member.

19. Pneumatic rotary tools as claimed in claim 18, it is characterized in that, the fingers of described axle comprises opening, described first valve member comprises extension, described fingers engages with described first valve member, thereby described opening is admitted described extension, so that described fingers is fixed on described first valve member.

20. Pneumatic rotary tools as claimed in claim 16, it is characterized in that, described actuator comprises first button and second button that may be operably coupled to described first valve member, described first button is suitable for making described first valve member to move to the described second place from described primary importance, and described second button is suitable for making described first valve member to move to described primary importance from the described second place.

21. Pneumatic rotary tools as claimed in claim 20, it is characterized in that, the described sky system of being dynamically connected comprises prodger and the groove that is used for described each button, described prodger is associated with described first valve member, each of described first button and second button all has the groove of admitting a corresponding prodger, described button be may be operably coupled to described first valve member.

22. Pneumatic rotary tools as claimed in claim 1, it is characterized in that, this Pneumatic rotary tools also comprises plunger, this plunger is slidably optionally to activate the opening and closing of described inlet, thereby optionally allow forced air to introduce described path, wherein said valve can roughly wind in the optionally rotation between the described primary importance and the second place of the described plunger on the longitudinal axis.

23. Pneumatic rotary tools as claimed in claim 22, it is characterized in that, described first connecting element comprises slide unit, this slide unit stretches out and has a groove that the activation axis that is approximately perpendicular to described actuator is extended from described actuator, and described second connecting element comprises from described valve and stretches out and be received in handle the groove of described slide unit.

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