WO2018235541A1 - エア工具 - Google Patents
エア工具 Download PDFInfo
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- WO2018235541A1 WO2018235541A1 PCT/JP2018/020522 JP2018020522W WO2018235541A1 WO 2018235541 A1 WO2018235541 A1 WO 2018235541A1 JP 2018020522 W JP2018020522 W JP 2018020522W WO 2018235541 A1 WO2018235541 A1 WO 2018235541A1
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- WIPO (PCT)
- Prior art keywords
- air supply
- air
- motor
- supply passage
- branch
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C20/00—Control of, monitoring of, or safety arrangements for, machines or engines
- F01C20/28—Safety arrangements; Monitoring
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
- B25F5/005—Hydraulic driving means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C1/00—Rotary-piston machines or engines
- F01C1/30—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
- F01C1/34—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F01C1/08 or F01C1/22 and relative reciprocation between the co-operating members
- F01C1/344—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F01C1/08 or F01C1/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C13/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01C13/02—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby for driving hand-held tools or the like
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C20/00—Control of, monitoring of, or safety arrangements for, machines or engines
- F01C20/04—Control of, monitoring of, or safety arrangements for, machines or engines specially adapted for reversible machines or engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C20/00—Control of, monitoring of, or safety arrangements for, machines or engines
- F01C20/06—Control of, monitoring of, or safety arrangements for, machines or engines specially adapted for stopping, starting, idling or no-load operation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
- F01C21/18—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
Definitions
- the invention relates to an air tool comprising an air motor, and more particularly to an air tool adapted to be able to switch the direction of rotation of the air motor between forward and reverse rotation.
- the supply path for supplying compressed air to the air motor is switched to switch the rotation direction of the air motor between forward rotation and reverse rotation. It is known what can be changed.
- the air motor normally, the air motor has two air supply ports, and the air supply passage extending from the air supply port connected to the external compressed air supply source branches halfway to provide two air supplies of the air motor.
- Each of the ports extends to the mouth and is provided with a switching valve for switching the flow path to the branch portion of the air supply path. The switching valve is displaceable between the forward rotation position and the reverse rotation position.
- the air supply passage is not communicated with any of the branch air supply passages.
- the air motor does not rotate because the compressed air does not flow first from the switching valve and is not supplied to the air motor regardless of the state of. Therefore, when the on-off valve is operated without noticing that the switching valve is in the neutral position, the air motor is not driven and no other change occurs in the air tool, so the operator breaks down the air tool Or the compressed air may be misidentified as not being supplied to the air tool.
- a ring-shaped operating member for operating the on-off valve like the air tool of Patent Document 3 is held at a drive position where the on-off valve is in the open position.
- the switching valve is set to the forward or reverse position to set the driving direction of the air motor.
- the air motor may be driven unexpectedly, leading to an unexpected accident.
- An object of the present invention is to provide an air tool that allows an operator to easily recognize the state in which the on-off valve is in the open position and the switching valve is in the neutral position.
- a first motor air supply port and a second motor air supply port are provided, and when compressed air is supplied from the first motor air supply port, forward rotation is performed, and compressed air is supplied from the second motor air supply port.
- an air tool comprising an air motor adapted to reverse rotation, An air inlet connected to an external compressed air supply; An air supply passage extending from the air supply port; A first branch air supply passage extending to the first motor air supply port of the air motor; A second branch air supply passage extending to the second motor air supply port of the air motor; An exhaust path for discharging compressed air to the outside; An open / close valve disposed in the middle of the air supply passage and displaceable between an open position for opening the air supply passage and a closing position for closing the air supply passage; An operating member for opening and closing the on-off valve, the operating member being displaceable between a drive position where the on-off valve is at the open position and a stop position where the on-off valve is at the closed position.
- a switching valve disposed between the air supply passage and the first and second branch air supply passages, the first branch air supply passage communicating with the air supply passage, and the second branch supply A forward rotation position for blocking the air passage, a neutral position for connecting the first and second branch air supply passages to the air supply passage, and a first air supply passage to the air supply passage.
- a switching valve displaceable between the second branch air supply passage and a reverse rotation position communicating with the second branch air supply passage; Equipped with When the on-off valve is in the open position and the switching valve is in the neutral position, compressed air supplied from the air supply port leads from the air supply passage to the first and second branch air supply passages.
- An air tool is provided which is adapted to be evacuated through the exhaust passage without substantially rotating the air motor.
- the switching valve When the switching valve is in the neutral position, the first and second branch air supply passages are in communication with the exhaust passage; When the on-off valve is in the open position and the switching valve is in the neutral position, at least a portion of the compressed air reaching the first and second branch air supply passages from the air supply passage is the first and the second The air can be passed from the second branch air supply passage to the exhaust passage without passing through the air motor.
- the air motor is a vane motor having a cylindrical motor chamber having a circular cross section and a rotor rotatably provided in the motor chamber, and the first and second motor air supplies opened adjacent to each other to the motor chamber
- a motor exhaust port at substantially equal distances from the mouth in the circumferential direction and in communication with the exhaust path;
- the operating member can be held at the drive position.
- the air tool is stopped with the switching valve in the neutral position and the on-off valve in the open position, and the air tool is used.
- the air motor may be suddenly driven when the switching valve is operated to do this, but in the case of the air tool, the operator can easily recognize by the exhaust sound that the open / close valve is in the open position.
- the air motor and the first main body provided with the switching valve, and the second main body provided with the opening / closing valve and the operation member and rotatably attached to the first main body One of the first main body portion and the second main body portion has a first locking portion, and the other has a plurality of second locking portions fitted to the first locking portion, The first locking portion is engaged with any one of the plurality of second locking portions at a plurality of relative rotational positions when the second main portion is rotated with respect to the first main portion.
- the rotational direction position of the second main body with respect to the one main body can be held.
- the circumferential position of the operation member can be arbitrarily changed. Therefore, even when the hand holding the air tool or the direction of the grip is changed according to the work content, the operation is performed according to it. As the position of the member can be changed, the operability is improved.
- the operating member may be a lever pivotally attached to the second body, and the lever may further include a lever fixing member for preventing the lever from being displaced to the drive position.
- FIG. 3 is a top cross-sectional view taken along line AA of FIG. 2;
- FIG. 5 is a side cross-sectional view taken along the line BB of FIG. 3;
- FIG. 5 is a side sectional view taken along the line CC of FIG. 3;
- It is an expanded sectional view around a switching valve, and is a figure showing the state where a switching valve is in a normal rotation position.
- It is an expanded sectional view of the switching valve periphery, and a figure showing the state where a switching valve is in a neutral position.
- FIG. 9 is a top cross-sectional view taken along line DD of FIG. 8;
- FIG. 10 is a side sectional view taken along the line EE of FIG. 9;
- FIG. 12 is a top cross-sectional view taken along line FF of FIG. FIG.
- FIG. 13 is a view showing a rear end surface of the first main body as viewed from the line GG in FIG. 12;
- FIG. 13 is a view showing the front end face of the second main body as viewed from the line HH in FIG. 12;
- It is a side view of the belt type grinding tool of FIG. 7, and is a figure which shows the state which the 2nd main-body part rotated 180 degree
- the air tool according to the first embodiment of the present invention comprises a tool body 110 having an air motor 112, a drive pulley 116 attached to a drive shaft 114 of the air motor 112, and a tool body as shown in FIGS.
- the belt type grinding tool 100 can change the rotation direction of the endless grinding belt 122 by changing the driving direction of the air motor 112 by the switching valve 124 as described later, and by opening and closing the on-off valve 126
- the supply of compressed air to the air motor 112 is controlled to drive and stop the air motor 112.
- the air motor 112 has a motor housing 130 defining a cylindrical motor chamber 128 having a circular cross section, a rotor 132 rotatably provided in the motor chamber 128, and a rotor 132. And a plurality of vanes 134 disposed radially displaceably.
- the motor housing 130 is provided with a first motor air inlet 136 and a second motor air inlet 138 which are adjacent to each other and open to the motor chamber 128, as shown in FIG.
- a motor exhaust port 140 is provided at a position substantially equal in the circumferential direction from the first motor air supply port 136 and the second motor air supply port 138.
- an air supply passage 144 extending from an air supply port 142 to which an external compressed air source (not shown) is connected is formed in the tool body 110, and the air supply passage 144 is formed halfway through the air supply passage 144.
- the on-off valve 126 for opening and closing the valve is disposed.
- the open / close valve 126 is urged to a closing position for closing the air supply passage 144 by the spring 146, and the air supply passage 144 is pushed by pressing the operating shaft 148 extending to the outside of the tool body 110 against the urging force of the spring 146. It is displaced to the open position to open.
- the tool body 110 further includes an operation ring (operation member) 150 for opening and closing the on-off valve 126.
- the operation ring 150 is restricted from rotating in the circumferential direction at the illustrated position, and can be rotated in the circumferential direction when it is displaced forward (left in the figure) against the biasing force of the spring 152. It becomes a state.
- the sliding inner circumferential surface 150a of the operation ring 150 is cam-engaged with the operation shaft 148 of the on-off valve 126 to press the operation shaft 148 radially inward.
- the on-off valve 126 is displaced to the open position.
- the air supply passage 144 is opened.
- the operation ring 150 is designed to maintain its position even if the hand is released at an arbitrary rotational position, and hence its position is also maintained at the drive position. Therefore, the belt type grinding tool 100 is driven. It is not necessary to hold the operation ring 150 by hand during the operation.
- the tool main body 110 further includes a first branch air supply passage 154 extending to the first motor air supply port 136 of the air motor 112 and a second motor air supply port 138 of the air motor 112, as shown in FIG.
- a two-branch air supply passage 156 is formed, and the switching valve 124 is disposed between the air supply passage 144 and the first and second branch air supply passages 154 and 156.
- the switching valve 124 is rotatably disposed in the tubular valve housing 158.
- the switching valve 124 has an operation knob 160 (FIGS. 2 and 3) located outside the tool body 110, and by operating the operation knob 160, the switching valve 124 is moved from the forward rotation position of FIG. 6A to FIG. It can be displaced to the reverse position of FIG.
- the switching valve 124 When the switching valve 124 is in the forward rotation position (FIG. 6A), the first branch air supply path 154 is in communication with the air supply path 144 via the air supply communication path 162 of the switching valve 124, and the second branch air supply Path 156 is shut off. Therefore, the compressed air supplied from the air supply passage 144 is supplied from the first motor air supply port 136 into the motor chamber 128 of the air motor 112 through the first branch air supply passage 154, and the rotor 132 is rotated forward (see FIG. 4). Look at it and turn it counterclockwise).
- the switching valve 124 When the switching valve 124 is in the reverse position (FIG.
- the first branch air supply passage 154 is shut off with respect to the air supply passage 144, and the second branch air supply passage 156 is communicated via the air supply communication passage 162.
- Ru. Therefore, the compressed air supplied from the air supply passage 144 is supplied from the second motor air supply port 138 into the motor chamber 128 of the air motor 112 through the second branch air supply passage 156 to reverse the rotor 132 (see FIG. 4). Look and rotate clockwise).
- the switching valve 124 is in the neutral position (FIG. 6B)
- both the first branch air supply path 154 and the second branch air supply path 156 are communicated with the air supply path 144 via the air supply communication path 162. .
- the compressed air supplied from the air supply port 142 reaches the first branch air supply path 154 and the second branch air supply path 156, and the belt type grinding is performed without substantially rotating the air motor 112.
- the tool 100 is evacuated.
- the tool body 110 is further formed with an exhaust passage 164 for finally exhausting the compressed air supplied from the air supply port 142 to the outside.
- the exhaust passage 164 is, as shown in FIG. 5, an annular first portion 164a extending from the motor exhaust port 140 of the air motor 112 to the periphery of the motor housing 130, and a second portion 164b extending secondly from the first portion 164a. It has an annular third portion 164c connected to 164b.
- the exhaust passage 164 further includes, as shown in FIG. 3, a fourth portion 164 d extending from the exhaust communication passage 166 of the switching valve 124 to the third portion 164 c, and a fifth portion extending rearward from the third portion 164 c to the exhaust port 168.
- 164e (shown by a broken line in FIG. 3).
- the compressed air supplied from the external compressed air supply source to the air supply port 142 is It reaches the switching valve 124 through the open air supply passage 144.
- the compressed air is further supplied from the first motor air supply port 136 into the motor chamber 128 of the air motor 112 through the first branch air supply path 154 communicated via the air supply communication path 162 of the switching valve 124, and the rotor 132. Rotate forward.
- a portion of the compressed air that has rotated the rotor 132 is exhausted from the air motor 112 through the motor exhaust port 140, and the remaining compressed air is exhausted from the air motor 112 through the second motor air supply port 138.
- the compressed air exhausted from the air motor 112 through the motor exhaust port 140 further passes through the first portion 164a, the second portion 164b, the third portion 164c, and the fifth portion 164e of the exhaust path 164 and is finally exhausted. Exhausted from the mouth 168 to the outside.
- the compressed air exhausted from the air motor 112 through the second motor air supply port 138 passes through the second branch air supply passage 156 and is communicated with the exhaust passage 164 communicated via the exhaust communication passage 166 of the switching valve 124.
- the gas is finally exhausted from the exhaust port 168 through the fourth portion 164d and further through the third portion 164c and the fifth portion 164e of the exhaust passage 164.
- compressed air is supplied from the air supply passage 144 through the air supply communication passage 162 of the switching valve 124.
- the air is supplied from the second motor air supply port 138 into the motor chamber 128 of the air motor 112 through the second branch air supply passage 156 communicated with each other to reverse the rotor 132.
- a portion of the compressed air which has caused the rotor 132 to rotate is exhausted from the air motor 112 through the motor exhaust port 140 and exhausted through the exhaust passage 164 in the same manner as in normal rotation.
- the remaining compressed air is exhausted from the air motor 112 through the first motor air supply port 136, passes through the first branch air supply passage 154, and is communicated with the exhaust passage 164 communicated via the exhaust communication passage 166 of the switching valve 124.
- the air is further exhausted through the four portions 164 d and thereafter through the same path as that for forward rotation.
- the second motor air supply port 138 serves as a motor exhaust port, and the second branch air supply path 156 constitutes a part of the exhaust path during normal rotation.
- the first motor air supply port 136 becomes a motor exhaust port, and the first branch air supply path 154 constitutes a part of the exhaust path.
- the rotational direction of the air motor 112 is switched between the forward rotation and the reverse rotation, whereby the rotation direction of the endless grinding belt 122 is changed.
- Ru The opening area between the air supply communication passage 162 and the first branch air supply passage 154 or the second branch air supply passage 156 is changed by adjusting the rotational position of the switching valve 124 at the forward rotation position and the reverse rotation position. It is also possible to adjust the rotational speed of the air motor 112 by adjusting the amount of compressed air supplied to the air motor 112.
- compressed air is supplied from the air supply passage 144 through the air supply communication passage 162 of the switching valve 124.
- the first branch air supply passage 154 and the second branch air supply passage 156 are communicated with each other.
- a portion of the compressed air enters the motor chamber 128 from the first motor air inlet 136 and the second motor air inlet 138, respectively, and passes between the inner circumferential surface 128a of the motor chamber 128 and the vane 134 to form the rotor 132.
- the switching valve 124 when the switching valve 124 is in the neutral position, the compressed air is exhausted through the exhaust passage 164 without substantially rotating the air motor 112. At this time, since the exhaust noise is generated by the compressed air exhausted through the exhaust path 164, the operator can easily recognize that the on-off valve 126 is in the open position with the switching valve 124 in the neutral position. . As described above, there are two paths through which the compressed air is exhausted: a path passing through the inside of the air motor 112 and a path not passing through the air motor 112. However, the compressed air may be exhausted through only one path. obtain.
- the compressed air can not pass through the rotor 132 chamber, and therefore substantially all of the compressed air is
- the air is exhausted in a path passing through the exhaust communication passage 166 of the switching valve 124.
- the path through which the compressed air is exhausted or the flow rate ratio of the two paths depends on the size of the flow path resistance of each path.
- the air tool according to the second embodiment of the present invention is a belt type grinding tool 200 in which an operation member for operating the on-off valve 226 is a lever 250 as shown in FIGS. 7 to 10. By pivoting the lever 250, the operating shaft 248 of the on-off valve 226 is pushed inward to be displaced from the closed position to the open position.
- the tool body 210 in the belt type grinding tool 200 includes a first body portion 210-1 provided with an air motor 212 and a switching valve 224, and a second body portion 210-2 provided with an open / close valve 226 and a lever 250.
- the second main body portion 210-2 is coaxially disposed with respect to the first main body portion 210-1 and rotatably attached to the first main body portion 210-1.
- the lever 250 can be changed between the position of FIG. 8 and the position of FIG. 15 inverted 180 degrees therefrom. It has become. As shown in FIG.
- the rear end surface 270 of the first main body portion 210-1 is formed with a plurality of locking concave portions (second locking portions) 272 arranged at intervals of 45 degrees in the circumferential direction. .
- a ball plunger (first locking portion) 274 having a ball biased by a spring is attached to the front end surface 271 of the second main body portion 210-2.
- the second main body portion 210-2 is rotated 45 degrees with respect to the first main body portion 210-1, and the ball plunger 274 is engaged with one of the locking recesses 272.
- the rotational direction position of the second main body portion 210-2 with respect to the main body portion 210-1 is held at a position of 45 degrees.
- the rotational position of the second main body portion 210-2 with respect to the first main body portion 210-1 is 0 degrees, 90 degrees, 135 degrees, and 180 degrees
- the ball plunger 274 is in the plurality of locking recesses 272.
- the second body portion 210-2 is held in the rotational direction.
- the direction of the lever 250 can be changed in accordance with the work content or in accordance with the preference of the operator, which improves the workability. Can be improved.
- the rotation range of the second main body portion 210-2 may be limited to a narrower range, or may be rotated 360 degrees without limit. Further, the arrangement interval of the locking recess 272 may be changed as appropriate, such as a narrower interval so that finer position adjustment can be performed.
- the first portion 244a formed in the first main portion 210-1 and the second portion 244b formed in the second main portion 210-2 of the air supply passage 244 are the first main portion 210-. The position in the rotational direction of the second main body portion 210-2 with respect to 1 is always in communication regardless of the position.
- the second portion 264b and the fourth portion 264d formed in the first main portion 210-1 of the exhaust passage 264 have a rotational direction of the second main portion 210-2 with respect to the first main portion 210-1.
- a fifth portion is formed in the second main portion 210-2 via the third portion 264c between the first main portion 210-1 and the second main portion 210-2 regardless of the position. It is always in communication with the part 264e.
- the lever 250 is provided with a lever fixing member 276 for fixing the on / off valve 126 at the stop position for closing it and preventing displacement to the drive position.
- a lever fixing member 276 for fixing the on / off valve 126 at the stop position for closing it and preventing displacement to the drive position.
- the present invention is not limited to these embodiments.
- the present invention may be another air tool such as a torque wrench other than a belt type grinding tool.
- the path of compressed air when the switching valve is in the neutral position does not necessarily have to include both the path passing through the air motor and the path not passing through the air motor, and only one of them may be provided. Good.
- Belt type grinding tool (air tool according to the first embodiment) 100; tool main body 110; air motor 112; drive shaft 114; drive pulley 116; pulley support bar 118; idle pulley 120; endless grinding belt 122; Motor chamber 128; motor housing 130; motor housing 130; rotor 132; vanes 134; first motor air supply port 136; second motor air supply port 138; motor exhaust port 140; Air passage 144; spring 146 (of an open / close valve); operation shaft 148; operation ring (operation member) 150; sliding inner circumferential surface 150a; spring 152 (of operation ring); first branch air supply passage 154; second branch Air supply passage 156; valve housing 158; operation knob 160; air supply communication passage 162; exhaust passage 164; first portion 64a; second portion 164b; third portion 164c; fourth portion 164d; fifth portion 164e; exhaust communication passage 166; exhaust port 168; Belt type grinding tool (air tool according to the second embodiment) 200; tool main body 210; first main body 210
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
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- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
Description
第1モータ給気口及び第2モータ給気口を有し、該第1モータ給気口から圧縮空気が供給されたときには正転し、該第2モータ給気口から圧縮空気が供給されたときには逆転するようにされたエアモータを備えるエア工具であって、
外部圧縮空気供給源に接続される給気口と、
該給気口から延びる給気路と、
該エアモータの該第1モータ給気口にまで延びる第1分岐給気路と、
該エアモータの該第2モータ給気口にまで延びる第2分岐給気路と、
圧縮空気を外部に排出するための排気路と、
該給気路の途中に配置され、該給気路を開放する開放位置と該給気路を閉止する閉止位置との間で変位可能とされた開閉バルブと、
該開閉バルブを開閉操作するための操作部材であって、該開閉バルブを該開放位置とする駆動位置と、該開閉バルブを該閉止位置とする停止位置との間で変位可能とされた操作部材と、
該給気路と該第1及び第2分岐給気路との間に配置された切替バルブであって、該給気路に対して該第1分岐給気路を連通させ該第2分岐給気路を遮断する正転位置と、該給気路に対して該第1及び第2分岐給気路を連通させるニュートラル位置と、該給気路に対して該第1分岐給気路を遮断し該第2分岐給気路を連通させる逆転位置と、の間で変位可能とされた切替バルブと、
を備え、
該開閉バルブが該開放位置にあり該切替バルブが該ニュートラル位置にあるときに、該給気口から供給される圧縮空気が、該給気路から該第1及び第2分岐給気路に至り、該エアモータを実質的に回転させることなく該排気路を通して排気されるようにされた、エア工具を提供する。
該切替バルブが、該ニュートラル位置にあるときに、該第1及び第2分岐給気路を該排気路に連通させるようにされ、
該開閉バルブが該開放位置にあり該切替バルブが該ニュートラル位置にあるときに、該給気路から該第1及び第2分岐給気路に至った圧縮空気の少なくとも一部が該第1及び第2分岐給気路から該エアモータ内を通過せずに該排気路に通されるようにすることができる。
該エアモータが断面円形の円柱状のモータ室と該モータ室内に回転可能に設けられたロータとを有するベーンモータであり、該モータ室に相互に隣接して開口した該第1及び第2モータ給気口からそれぞれ周方向で略等しい距離にあり該排気路に連通したモータ排気口を有し、
該開閉バルブが該開放位置にあり該切替バルブが該ニュートラル位置にあるときに、該給気路から該第1及び第2分岐給気路に至った圧縮空気の少なくとも一部が、該第1及び第2モータ給気口からそれぞれ該モータ室に入り、該ロータの周りを互いに逆回りに流れて該モータ排気口に至り該排気路に通されるようにすることもできる。
該エアモータ及び該切替バルブを備える第1本体部と、該開閉バルブ及び該操作部材を備え該第1本体部に対して回転可能に取り付けられた第2本体部と、を有し、
該第1本体部と該第2本体部とのうちの一方が第1係止部を有し、他方が該第1係止部と嵌合する複数の第2係止部を有し、該第2本体部が該第1本体部に対して回転したときに複数の相対回転位置において該第1係止部が該複数の第2係止部のうちのいずれかに嵌合して該第1本体部に対する該第2本体部の回転方向位置が保持されるようにすることができる。
ベルト式研削工具(第2の実施形態に係るエア工具)200;工具本体210;第1本体部210-1;第2本体部210-2;エアモータ212;切替バルブ224;開閉バルブ226;給気路244;第1部分244a;第2部分244b;操作軸248;レバー(操作部材)250;排気路264;第2部分264b;第3部分264c;第4部分264d;第5部分264e;後端面270;前端面271;係止凹部(第2係止部)272;ボールプランジャ(第1係止部)274;レバー固定部材276;
Claims (6)
- 第1モータ給気口及び第2モータ給気口を有し、該第1モータ給気口から圧縮空気が供給されたときには正転し、該第2モータ給気口から圧縮空気が供給されたときには逆転するようにされたエアモータを備えるエア工具であって、
外部圧縮空気供給源に接続される給気口と、
該給気口から延びる給気路と、
該エアモータの該第1モータ給気口にまで延びる第1分岐給気路と、
該エアモータの該第2モータ給気口にまで延びる第2分岐給気路と、
圧縮空気を外部に排出するための排気路と、
該給気路の途中に配置され、該給気路を開放する開放位置と該給気路を閉止する閉止位置との間で変位可能とされた開閉バルブと、
該開閉バルブを開閉操作するための操作部材であって、該開閉バルブを該開放位置とする駆動位置と、該開閉バルブを該閉止位置とする停止位置との間で変位可能とされた操作部材と、
該給気路と該第1及び第2分岐給気路との間に配置された切替バルブであって、該給気路に対して該第1分岐給気路を連通させ該第2分岐給気路を遮断する正転位置と、該給気路に対して該第1及び第2分岐給気路を連通させるニュートラル位置と、該給気路に対して該第1分岐給気路を遮断し該第2分岐給気路を連通させる逆転位置と、の間で変位可能とされた切替バルブと、
を備え、
該開閉バルブが該開放位置にあり該切替バルブが該ニュートラル位置にあるときに、該給気口から供給される圧縮空気が、該給気路から該第1及び第2分岐給気路に至り、該エアモータを実質的に回転させることなく該排気路を通して排気されるようにされた、エア工具。 - 該切替バルブが、該ニュートラル位置にあるときに、該第1及び第2分岐給気路を該排気路に連通させるようにされ、
該開閉バルブが該開放位置にあり該切替バルブが該ニュートラル位置にあるときに、該給気路から該第1及び第2分岐給気路に至った圧縮空気の少なくとも一部が該第1及び第2分岐給気路から該エアモータ内を通過せずに該排気路に通されるようにされた、請求項1に記載のエア工具。 - 該エアモータが断面円形の円柱状のモータ室と該モータ室内に回転可能に設けられたロータとを有するベーンモータであって、該モータ室に相互に隣接して開口した該第1及び第2モータ給気口からそれぞれ周方向で略等しい距離にあり該排気路に連通したモータ排気口を有し、
該開閉バルブが該開放位置にあり該切替バルブが該ニュートラル位置にあるときに、該給気路から該第1及び第2分岐給気路に至った圧縮空気の少なくとも一部が、該第1及び第2モータ給気口からそれぞれ該モータ室に入り、該ロータの周りを互いに逆回りに流れて該モータ排気口に至り該排気路に通されるようにされた、請求項1又は2に記載のエア工具。 - 該操作部材が、該駆動位置に保持可能であるようにされた、請求項1乃至3の何れか一項に記載のエア工具。
- 該エアモータ及び該切替バルブを備える第1本体部と、該開閉バルブ及び該操作部材を備え該第1本体部に対して回転可能に取り付けられた第2本体部と、を有し、
該第1本体部と該第2本体部とのうちの一方が第1係止部を有し、他方が該第1係止部と嵌合する複数の第2係止部を有し、該第2本体部が該第1本体部に対して回転したときに複数の相対回転位置において該第1係止部が該複数の第2係止部のうちのいずれかに嵌合して該第1本体部に対する該第2本体部の回転方向位置が保持されるようにされた、請求項1乃至4の何れか一項に記載のエア工具。 - 該操作部材が該第2本体部に枢動可能に取り付けられたレバーであり、該レバーが該駆動位置に変位することを防止するレバー固定部材をさらに備える、請求項5に記載のエア工具。
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GB1918473.8A GB2577441B (en) | 2017-06-23 | 2018-05-29 | Air tool |
CN201880042040.9A CN110785266B (zh) | 2017-06-23 | 2018-05-29 | 气动工具 |
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TWI677411B (zh) | 2019-11-21 |
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JP6864741B2 (ja) | 2021-04-28 |
DE112018003194B4 (de) | 2024-08-29 |
KR20200018646A (ko) | 2020-02-19 |
CN110785266B (zh) | 2022-10-04 |
CN110785266A (zh) | 2020-02-11 |
JPWO2018235541A1 (ja) | 2020-04-16 |
GB2577441B (en) | 2022-09-21 |
TW201919829A (zh) | 2019-06-01 |
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DE112018003194T5 (de) | 2020-03-05 |
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