WO2014208589A1 - Outil pneumatique - Google Patents

Outil pneumatique Download PDF

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Publication number
WO2014208589A1
WO2014208589A1 PCT/JP2014/066815 JP2014066815W WO2014208589A1 WO 2014208589 A1 WO2014208589 A1 WO 2014208589A1 JP 2014066815 W JP2014066815 W JP 2014066815W WO 2014208589 A1 WO2014208589 A1 WO 2014208589A1
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WO
WIPO (PCT)
Prior art keywords
exhaust pipe
air
exhaust
air supply
supply
Prior art date
Application number
PCT/JP2014/066815
Other languages
English (en)
Japanese (ja)
Inventor
保全 鈴木
Original Assignee
日東工器株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日東工器株式会社 filed Critical 日東工器株式会社
Priority to CN201480034943.4A priority Critical patent/CN105307822B/zh
Priority to KR1020167001644A priority patent/KR101921391B1/ko
Priority to JP2015524077A priority patent/JP6185585B2/ja
Priority to EP14818561.4A priority patent/EP3015225B1/fr
Publication of WO2014208589A1 publication Critical patent/WO2014208589A1/fr

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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
    • B25F5/005—Hydraulic driving means

Definitions

  • the present invention relates to an air tool in which an air motor is driven by compressed air.
  • Patent Document 1 As this type of air tool, there are a belt grinding tool (Patent Document 1) for performing a grinding operation by rotationally driving an endless grinding belt, an air impact wrench (Patent Document 2) for performing a fastening operation such as a bolt, and the like.
  • Patent Document 2 an air supply pipe constituting an air supply passage for supplying compressed air to a built-in air motor is provided in a housing constituting the grip portion. Further, the space formed between the housing and the air supply pipe is used as an exhaust passage for exhausting compressed air discharged from the air motor.
  • the portion of the housing containing the air motor is cooled, and the compressed air whose temperature is lowered is reduced.
  • the portion constituting the exhaust passage of the housing is also cooled. Since the housing constitutes a grip portion that the worker grips while working, the worker must keep gripping the cooled housing. In particular, in winter and the like, workability may be greatly impaired because it may become so cold that the work cannot be continued unless gloves are worn.
  • the exhaust gas flows directly through the housing, the hydraulic oil contained in the compressed air exhausted from the air motor can leak to the outside through gaps and joints in the housing, which can easily contaminate the grip part, thereby impairing workability. There is also.
  • an object of the present invention is to provide an air tool having an exhaust pipe so as to reduce cooling of the housing due to adiabatic expansion of the exhaust. Another object is to provide an air tool having an exhaust pipe so that hydraulic oil does not leak onto the grip portion of the housing.
  • a tool housing having an air motor housing portion for housing the air motor and a cylindrical air supply / exhaust pipe housing portion extending from the air motor housing portion to a rear opening end, wherein the air motor housing portion is compressed into the air motor.
  • a tool housing having a compressed air inlet for supplying air and a compressed air outlet for discharging compressed air from the air motor, wherein the compressed air inlet and the compressed air outlet open into the supply / exhaust pipe housing portion;
  • An air supply pipe disposed inside the air supply / exhaust pipe housing portion of the tool housing, the supply air inlet being positioned near the rear opening end and receiving compressed air from a compressed air supply source, the compressed air inlet
  • An air supply pipe having a communication air supply outlet and an air supply passage extending from the supply air inlet to the supply air outlet;
  • An exhaust pipe disposed inside the supply / exhaust pipe housing portion of the tool housing, the exhaust inlet communicating with the compressed air outlet, and positioned near the rear opening end for accommodating compressed air in the supply / exhaust pipe
  • An exhaust outlet for discharging to the outside of the unit, and an exhaust pipe having an exhaust passage extending from the exhaust inlet to the exhaust outlet;
  • An air tool is provided in which the exhaust pipe is formed separately from the supply / exhaust pipe housing portion.
  • the exhaust pipe disposed in the tool housing is formed separately from the supply / exhaust pipe housing portion of the tool housing, the exhaust cooled by adiabatic expansion directly cools the tool housing. This can be avoided, and it is thereby possible to prevent the tool housing from getting cold.
  • the exhaust gas is exhausted to the outside without directly touching the supply / exhaust pipe housing part, so that the hydraulic oil in the exhausted compressed air is prevented from leaking outside through the gap in the supply / exhaust pipe housing part. It is also possible to do.
  • the exhaust pipe may be arranged so that a gap is formed between the exhaust pipe and the side wall of the supply / exhaust pipe housing portion.
  • the heat insulation effect between the exhaust pipe and the air supply / exhaust pipe housing part is enhanced, and further cooling of the tool housing due to the adiabatically expanded exhaust can be further suppressed. It becomes possible.
  • the exhaust pipe is partly engaged with the supply / exhaust pipe housing portion and supported by the supply / exhaust pipe housing portion, and a part of the exhaust pipe and the part thereof are engaged.
  • a recess is provided in at least one of the air supply / exhaust pipe accommodating parts, and a gap is formed between a part of the exhaust pipe and the air supply / exhaust pipe accommodating part with which the part is engaged. can do.
  • the air supply / exhaust pipe accommodating portion is supported by the exhaust pipe, so that the rigidity of the tool housing can be increased and the gap is formed.
  • the cooling of the supply / exhaust pipe housing can be suppressed
  • the air supply pipe is formed separately from the air supply / exhaust pipe housing portion, and is arranged so as to form a gap between the side wall of the air supply / exhaust pipe housing portion. it can.
  • the supply pipe and the exhaust pipe housing part are formed separately from the exhaust pipe, the manufacture can be facilitated as compared with the case where they are formed integrally with the supply / exhaust pipe housing part.
  • the tool housing is directly attached by the air supply pipe cooled as the exhaust pipe is cooled by adiabatic expansion of the compressed air. Cooling can be avoided.
  • the air supply pipe and the exhaust pipe can be integrally formed.
  • the air supply outlet of the air supply pipe is located above the exhaust inlet of the exhaust pipe, and the air supply inlet of the air supply pipe is located below the exhaust outlet of the exhaust pipe,
  • the air supply flow path of the air supply pipe extends substantially linearly from the air supply inlet to the air supply outlet,
  • the exhaust pipe has first and second intermediate parts that are divided into right and left at an intermediate part between the exhaust inlet and the exhaust outlet, and the first and second intermediate parts pass through the air supply pipe on both sides. It can be made to extend so that it may be pinched from.
  • upper and lower are positional relationships when the “air motor housing” is set to the front position and the “supply / exhaust pipe housing” is set to extend substantially rearward in the horizontal direction from the air motor housing.
  • the positional relationship during use of the air tool does not necessarily mean.
  • the air supply inlet of the supply pipe connected to the compressed air supply source By setting the supply inlet of the supply pipe connected to the compressed air supply source to a position below the exhaust outlet, it is possible to prevent exhaust from hitting the air hose hanging from the supply inlet. Furthermore, since the air supply flow path is substantially linear, it is possible to reduce the pressure loss when supplying compressed air to the air motor. Further, since the intermediate portion of the exhaust pipe is configured so as to sandwich the air supply pipe from both sides, the intermediate portion of the exhaust passage is compared with the case where the entire intermediate portion is extended through one side of the air supply pipe extending linearly. While ensuring the flow path cross-sectional area in the intermediate portion, the bending of the exhaust flow path can be reduced, and the flow path resistance can be suppressed.
  • the air supply outlet of the air supply pipe is located below the exhaust inlet of the exhaust pipe, the air supply inlet of the air supply pipe is located below the exhaust outlet of the exhaust pipe, and the air supply flow path And the exhaust channel may be arranged in parallel.
  • a first seal member disposed between the air supply outlet of the air supply pipe and the compressed air inlet of the tool housing, the exhaust inlet of the exhaust pipe, and the compressed air outlet of the tool housing
  • a second seal member disposed between The air supply pipe and the exhaust pipe are inserted into the air supply / exhaust pipe accommodating portion in a direction substantially perpendicular to the air supply passage and the exhaust flow path, and are arranged in the air supply / exhaust pipe accommodating portion.
  • the surface of the first seal member that is inclined with respect to this direction so that the end surface of the air supply outlet of the air supply pipe faces the direction and the surface of the first seal member that contacts the end surface of the air supply outlet has been inserted.
  • the air supply pipe and the exhaust pipe are attached to the tool housing, the air supply pipe and the exhaust pipe are inserted into the supply / exhaust pipe housing portion of the tool housing in a direction substantially perpendicular to the air supply flow path and the exhaust flow path. Accordingly, the first and second seal members are gradually compressed by the air supply outlet and the exhaust inlet, respectively. Thereby, compared with the case where the air supply outlet, the exhaust inlet, and each seal member are not inclined, the sliding friction applied to each seal member is reduced, and the possibility that each seal member is damaged by the friction is reduced.
  • a valve for opening and closing the air supply flow path disposed in the air supply pipe may be further provided.
  • valve control member that extends from the outside of the air supply pipe into the air supply flow path without passing through the exhaust flow path, and is engaged with the valve, The valve control member can be opened and closed by operating the valve control member from the outside.
  • valve control member Since the valve control member is provided so as not to pass through the exhaust flow path, there is no need to provide a seal structure with the valve control member in the exhaust flow path, and the configuration can be simplified.
  • FIG. 1 is a side view of an air tool according to a first embodiment of the present invention. It is sectional drawing in the II-II line of FIG. It is sectional drawing in the III-III line of FIG. It is sectional drawing in the IV-IV line of FIG. It is sectional drawing in the VV line of FIG. It is sectional drawing in the VI-VI line of FIG. It is a perspective view of an air supply / exhaust pipe. It is a side view of the air tool which concerns on the 2nd Embodiment of this invention. It is sectional drawing in the IX-IX line of FIG. It is sectional drawing in the XX line of FIG.
  • the air tool 10 includes a tool housing 20 that houses the air motor 12, a drive pulley 80 that is fixed to the output shaft 14 of the air motor 12, and A pulley support body 82 attached to the tool housing 20 so as to cover the drive pulley 80 and extending forward, and a pulley support bar 84 attached to the pulley support body 82 slidably in the front-rear direction and extending forward
  • An idle pulley 86 rotatably attached to the tip end portion 84-1 of the pulley support bar 84, and an endless grinding belt 87 wound between the drive pulley 80 and the idle pulley 86 is attached to the air motor 12.
  • This is a belt-type grinding tool 10 that is rotationally driven by a driving force.
  • the tool housing 20 includes a cylindrical air motor housing portion 21 and a cylindrical air supply / exhaust tube housing portion extending rearward from the air motor housing portion 21 to the rear opening end 22. 24.
  • the air motor 12 is arranged in the air motor housing part 21, and the air supply / exhaust pipe 40 separated from the tool housing 20 is arranged in the air supply / exhaust pipe housing part 24.
  • the air motor accommodating portion 21 is provided with a compressed air inlet 21-1 for supplying compressed air to the air motor 12 so as to open into the air supply / exhaust pipe accommodating portion 24.
  • a compressed air outlet 21-2 for discharging compressed air from the air motor 12 is provided at a position below the air inlet 21-1.
  • the air supply / exhaust pipe 40 has a structure in which an air supply pipe 41 constituting an air supply flow path 41-1 and an exhaust pipe 42 constituting an exhaust flow path 42-1 are integrally formed.
  • the air outlet 41-2 is connected to the compressed air inlet 21-1 via the seal member 50, and the exhaust inlet 42-2 at the front end of the exhaust pipe 42 is connected to the compressed air outlet 21-2 via the seal member 52.
  • a joint 54 for connecting an air tube (not shown) connected to a compressed air supply source is attached to the air supply inlet 41-3 at the rear end of the air supply pipe 41.
  • the joint 54 is separated from the air supply passage 41-1 by the engagement of the joint holding pin 56 inserted into the pin insertion hole 44 (FIG. 7) penetrating in the transverse direction of the air supply / exhaust pipe 40. While being held so as not to come off, it is attached so as to be rotatable around the longitudinal axis.
  • the supply air flow path 41-1 extending from the supply air inlet 41-3 to the supply air outlet 41-2 extends substantially linearly, and the compressed air supplied from the compressed air supply source passes therethrough. The pressure loss at the time is suppressed.
  • the exhaust pipe 42 is connected to the air supply pipe 41 in the middle from the exhaust inlet 42-2 connected to the compressed air outlet 21-2 to the exhaust outlet 42-3 located above the rear opening end 22 of the tool housing 20.
  • the first intermediate portion 42-4a and the second intermediate portion 42-4b extend so as to sandwich a part of the air supply pipe 41 from both sides. Intersects. Therefore, the exhaust flow path 42-1 constituted by such an exhaust pipe 42 is a flow path in which one flow path is branched into two at the intermediate portion 42-4 and integrated into one. Yes.
  • the intermediate portion 42-4 of the exhaust flow path 42-1 is compared with the case where the intermediate portion 42-4 is extended through one side of the air supply pipe 41 extending linearly.
  • the bending of the exhaust passage 42-1 can be reduced while the passage cross-sectional area is secured, and the passage resistance can be suppressed.
  • the width of the supply / exhaust pipe accommodating portion 24 that accommodates the supply / exhaust pipe 40 is kept small by suppressing the width in the vertical direction as viewed in FIG.
  • the grip part 26 comprised by the outer peripheral surface of the air supply / exhaust pipe accommodating part 24 is made into the compact shape.
  • the tool housing 20 is a resin member
  • the air supply / exhaust pipe 40 is a metal member formed by casting, and the supply portion constituting the grip portion 26 in the tool housing 20 is provided.
  • a valve 60 for opening and closing the air supply passage 41-1 and controlling the supply of compressed air to the air motor 12 is provided in the air supply passage 41-1 of the air supply pipe 41.
  • the valve 60 includes a valve seal member 62 that is hermetically engaged with a seal surface 47 formed in a stepped portion 46 provided in the air supply passage 41-1, and a rear end portion 63- fixed to the valve seal member 62. 1 in the air supply flow path 41-1 and the valve rod 63 extending toward the air supply outlet 41-2 and the valve in the air supply flow path 41-1 so as to press the valve seal member 62 against the seal surface 47.
  • the spring 64 is set between the seal member 62 and the front end face of the joint 54.
  • the valve 60 is opened and closed from the outside of the air supply / exhaust pipe 40 by a valve control member 66 extending through the opening 48 provided in the side wall of the air supply pipe 41 and into the air supply flow path 41-1. Yes. Specifically, the valve control member 66 is disposed in a state in which the distal end portion 63-2 of the valve rod 63 is inserted into an insertion hole 66-1 provided at the distal end portion thereof. By pushing into the air supply passage 41-1, the tip 63-2 of the valve rod 63 is pushed upward as seen in the figure, and the valve rod 63 is tilted, whereby the valve seal member 62 is moved as shown in FIG. The gap is inclined so that a gap is formed between the valve seal member 62 and the seal surface 47.
  • the gap between the valve seal member 62 and the seal surface 47 is generated, so that the seal between the valve 60 and the air supply passage 41-1 is released, and the air supply passage 41-1 is connected to the air supply inlet 41-3 and the air supply outlet. Communication with 41-2 is established.
  • a valve operating lever 70 for an operator to open and close the valve 60 is disposed below the supply / exhaust pipe housing 24.
  • the valve operating lever 70 is pivotally attached to the tool housing 20 around a pivot 72 located inside the air supply / exhaust pipe accommodating portion 24, and has an operation surface 70-1 exposed to the outside of the tool housing 20. By pushing upward as seen in the figure, it pivots clockwise as seen in the figure from the state where it protrudes downward from the tool housing 20 as shown in FIG. 1 to the state where it is pushed into the tool housing 20 as shown in FIG. It is supposed to be.
  • the valve operating lever 70 is engaged with the rear end surface 66-2 of the valve control member 66 at an engaging surface 70-2 at a position facing the air supply / exhaust pipe 40, and the valve operating lever 70 is pivoted. By moving, the valve control member 66 can be pushed into the air supply passage 41-1, and the valve 60 can be opened as described above.
  • the valve operating lever 70 includes a screw shaft 74 that is slidable in the longitudinal axis direction with respect to the valve operating lever 70 but is held so as not to rotate around the longitudinal axis direction.
  • a nut 76 that can be rotated by screwing and an abutting member 78 fixed to the tip of the screw shaft 74 are provided.
  • the abutting member 78 abuts on an inclined abutting surface 49 provided on the lower outer surface of the air supply / exhaust pipe 40, so that the pivoting range of the valve operating lever 70 is reduced. Limited. Further, the contact member 78 moves in the axial direction together with the screw shaft 74 by rotating the nut 76, and the contact member 78 changes the position of the contact member 78 so that the contact member 78 moves to the air supply / exhaust pipe 40. The pivot position of the valve operating lever 70 when contacting the inclined contact surface 49 can be adjusted. By adjusting the pivoting range of the valve operating lever 70 in this way, the amount of movement by which the valve control member 66 is pushed into the air supply passage 41-1 is changed.
  • the valve control member 66 is set so as to extend into the air supply flow path 41-1 without passing through the exhaust flow path 42-1, so that the valve control member 66 is connected to the air supply flow path 41. -1 is provided only in the air supply pipe 41 and is not provided in the exhaust pipe 42. For this reason, since the portion that needs to be sealed with respect to the valve control member 66 is limited to the air supply pipe 41, the number of seal portions can be reduced, the structure can be simplified, and the sliding resistance by the seal member can be reduced to open and close the valve. Operability at the time is improved.
  • valve operation lever 70 When the force that has pushed the operation surface 70-1 of the valve operation lever 70 is released, the valve operation lever 70 is biased by the biasing force of the spring 64 that attempts to return the valve seal member 62 to the closed state of the air supply passage 41-1. 70 is pushed by the valve control member 66 and pivots counterclockwise to return to the state of FIG. In a situation where compressed air is supplied from the joint 54, the pressure of the compressed air also becomes a force for returning the valve seal member 62 to the closed state. That is, the valve operating lever 70 is returned to the state before the operation (FIG. 1) by the urging force of the spring 64 and the pressure of the compressed air.
  • the compressed air is supplied from the compressed air supply source via the air tube connected to the joint 54
  • the valve 60 is opened by pressing the operation surface 70-1 of the valve operation lever 70
  • the compressed air is supplied to the supply airflow.
  • the air flows from the air supply port 12-1 into the air motor 12 through the passage 41-1 and the compressed air inlet 21-1.
  • the air motor 12 supplied with the compressed air is driven to rotate counterclockwise as viewed in FIG.
  • the compressed air discharged from the exhaust port 12-2 through the air motor 12 flows from the compressed air outlet 21-2 into the exhaust flow path 42-1, and from the exhaust outlet 42-3 to the rear opening end of the tool housing 20. 22 is discharged into the atmosphere.
  • the pressure of the compressed air that has rotated the air motor 12 rapidly decreases and adiabatically expands. Since the temperature of the adiabatic expansion air decreases, the exhaust pipe 42 is cooled by the air whose temperature has decreased.
  • the side surface of the exhaust pipe 42 in the supply / exhaust pipe 40 is disposed in the supply / exhaust pipe housing portion 24 while being engaged with the side wall 28 of the supply / exhaust tube housing portion 24.
  • the air supply / exhaust pipe 40 supports the tool housing 20 from the inside, and the tool housing 20.
  • the grip portion 26 is provided with necessary and sufficient rigidity.
  • a plurality of recesses 30 are formed in the portion of the air supply / exhaust pipe accommodating portion 24 that engages with the exhaust pipe 42, and a gap is formed between the air supply / exhaust pipe 40 and the contact area is reduced. .
  • a gap is formed between the air supply / exhaust pipe 40 and the upper surface wall 32 and the lower surface wall 34 of the air supply / exhaust pipe accommodating portion 24.
  • a clearance is provided between the air supply / exhaust pipe 40 and the air supply / exhaust pipe accommodating part 24 forming the grip part 26, and a recess 30 is provided in the engaging part to reduce the contact area.
  • heat is not easily transmitted between the grip portion 26 and the air supply / exhaust pipe 40. That is, it is possible to suppress the grip portion 26 from being cooled by the exhaust pipe 42 that has been cooled by adiabatic expansion of compressed air while the air tool 10 is being used.
  • a bar receiving hole 82-1 for receiving the pulley support bar 84 is provided at the distal end portion 84-1 of the pulley support main body portion 82 attached to the tool housing 20.
  • a sliding insert 88 is inserted into the bar receiving hole 82-1, and this sliding insert 88 is screwed into a screw hole 82-2 that penetrates from the side surface of the pulley support main body portion 82 to the bar receiving hole 82-1.
  • the pulley is fixed to the pulley support main body 82 by a fixed fixing screw 89.
  • the pulley support bar 84 is inserted into an inner hole having a smooth surface of the sliding insert 88 and is held so as to be slidable in the front-rear direction with respect to the pulley support main body 82. Is formed with a slot restricting hole 84-2 in the form of a slot hole extending in the front-rear direction.
  • a positioning screw 90 is inserted into the pulley support main body 82 from the side surface of the pulley support main body 82 and passes through the through-hole 88-1 of the sliding insert 88 by a predetermined length in the front-rear direction of the pulley support bar 84. It is provided so as to extend into the extending slot hole-like sliding restriction hole 84-2.
  • the positioning screw 90 holds the pulley support bar 84 so as not to rotate, and limits the range in which the pulley support bar 84 can slide in the front-rear direction.
  • the pulley support bar 84 is formed with a spring accommodation hole 84-4 extending forward from the rear end face 84-3.
  • the pulley support bar 84 is urged forward in the spring accommodation hole 84-4.
  • a spring 92 is set for this purpose.
  • the spring 92 has a front end portion 92-1 abutting against the front end surface 84-5 of the spring accommodating hole 84-4, and a rear end portion 92-2 facing further rearward from the rear end surface 84-3 of the pulley support bar 84. It is set to extend.
  • a spring support member 94 for supporting the spring 92 from its rear position is attached to the rear of the bar receiving hole 82-1 so as to be pivotable about a pivot shaft 94-1 on the pulley support main body 82. Yes.
  • the spring support projection 94-2 of the spring support member 94 engages with the spring seat 96 disposed at the rear end portion 92-2 of the spring 92, and the spring 92 is compressed with the pulley support bar 84. Due to the urging force of the spring 92, the idle pulley 86 provided at the front end of the pulley support bar 84 is pressed against the inner peripheral surface of the endless grinding belt 87, and a predetermined tension is applied to the endless grinding belt 87. .
  • the spring support member 94 When the spring support member 94 is rotated approximately 90 degrees clockwise as viewed in the figure, the spring seat 96 is not supported by the spring support protrusion 94-2, and the spring 92 extends to a natural length. In this state, the pulley support bar 84 can move rearward without receiving the biasing force of the spring 92, so that a gap is generated between the idle pulley 86 and the endless grinding belt 87, and the endless grinding belt 87 is removed. Is possible.
  • the spring support member 94 is provided with a cover 98 that covers the drive pulley 80 from the side, and pivots together with the spring support member 94.
  • the air tool 110 according to the second embodiment of the present invention shown in FIGS. 8 to 10 is mainly different from the air tool 10 according to the first embodiment in the configuration of the flow path of the compressed air. .
  • the supply outlet 141-2 of the supply pipe 141 is positioned below the exhaust inlet 142-2 of the exhaust pipe 142, and the supply inlet 141-3 of the supply pipe 141. Is located below the exhaust outlet 142-3 of the exhaust pipe 142, and the supply air flow path 141-1 and the exhaust flow path 142-1 are arranged in parallel. Accordingly, the positions of the compressed air inlet 121-1 and the compressed air outlet 121-2 of the tool housing 120 are opposite to those of the air tool 10 according to the first embodiment.
  • the compressed air inlet 121-1 is positioned below the compressed air outlet 121-2.
  • the compressed air supplied from the supply inlet 141-3 of the supply pipe 141 passes through the supply passage 141-1 and the supply inlet 141-3 and enters the air motor 112 from the intake port 112-1 of the air motor 112.
  • the air motor 112 is driven to rotate in the same direction while flowing counterclockwise as viewed in the figure.
  • the compressed air exiting from the exhaust port 112-2 of the air motor 112 reverses the flow direction and flows clockwise in the annular flow path 112-3 formed outside the air motor 112, and then flows into the compressed air outlet 121-2. From the exhaust outlet 142-3 to the outside.
  • the tool housing 120 includes a right portion 120-1, a left portion 120-2, and a cap portion 120-3, and the air supply / exhaust pipe 140 has a left portion 120-2 and a cap portion 120. -3 is removed, the inside of the air supply / exhaust pipe accommodating portion 124 of the right portion 120-1 in the direction D (rightward) substantially perpendicular to the air supply flow path 141-1 and the exhaust flow path 142-1. It is inserted and arranged.
  • a first seal member 150 is disposed between the air supply outlet 141-2 of the air supply pipe 141 and the compressed air inlet 121-1 of the tool housing 120.
  • the second seal member 152 is also disposed between the exhaust inlet 142-2 of the exhaust pipe 142 and the compressed air outlet 121-2 of the tool housing 120.
  • the end surface 141-4 of the air supply outlet 141-2 of the air supply pipe 141 is inclined with respect to the direction D so as to face the direction D, and the supply of the first seal member 150 is made.
  • the surface 151 that contacts the air outlet 141-2 is similarly inclined.
  • the end surface 142-4 of the exhaust inlet 142-2 of the exhaust pipe 142 and the surface 153 that contacts the exhaust inlet 142-2 of the second seal member 152 are similarly inclined.
  • the surfaces 151, 153 of the first and second seal members 150, 152 are inserted.
  • the end surfaces 141-4 and 142-4 of the air supply / exhaust pipe 140 gradually decrease, and eventually the surfaces 151 and 153 of the first and second seal members 150 and 152 and the air supply and exhaust pipe 140 The end faces 141-4 and 142-4 come into contact with each other.
  • the first and second seal members 150, 152 are gradually compressed by the end faces 141-4, 142-4 of the air supply / exhaust pipe 140, and the air supply / exhaust pipe
  • the first and second seal members 150, 152 are sealed to the end faces 141-4, 142-4 of the supply / exhaust pipe 140, respectively. It is in an engaged state.
  • the air supply / exhaust pipe 140 is inserted into the right portion 120-1, but may be inserted into the left portion 120-2. In that case, the direction D is the left direction.
  • the tool housing 120 may be divided into the upper limit instead of being divided into left and right, and the air supply / exhaust pipe 140 may be inserted into the air supply / exhaust pipe accommodating portion 124 of the tool housing 120 in the vertical direction. .
  • the structure of the sealing connection between the above-described air supply / exhaust pipe 140 and the first seal member 150 and the second seal member 152 in the second embodiment may be adopted in the air tool 10 in the first embodiment. Good.
  • the 1st sealing member 150 and the 2nd sealing member 152 are an integral member, it is good also as a separate member.
  • the air supply and exhaust pipes 40 and 140 cooled by the compressed air are provided separately from the tool housings 20 and 120 constituting the grip portions 26 and 126.
  • the heat insulation between the air supply / exhaust pipes 40 and 140 and the tool housings 20 and 120 is enhanced, and the grip portions 26 and 126 are prevented from being directly cooled by the compressed air whose temperature is lowered due to adiabatic expansion. Thereby, it can suppress that the grips 26 and 126 become cold.
  • the flow paths are formed as a joint structure between the members.
  • the air supply / exhaust pipes 40 and 140 are formed as separate members in which the air supply channels 41-1 and 141-1 and the exhaust channels 42-1 and 142-1 are formed. Therefore, the number of seal locations in the flow path through which the compressed air passes is reduced compared to the conventional one, the structure can be simplified, and leakage from the seal portion of the compressed air and the hydraulic oil contained in the compressed air is reduced. You can also.
  • the air supply pipes 41 and 141 and the exhaust pipes 42 and 142 are configured as an integrated air supply and exhaust pipe 40 and 140.
  • the air supply pipes 41 and 141 and the exhaust pipes 42 and 142 are separately provided. It is good also as a member of.
  • the belt-type grinding tools 10 and 110 have been described as examples of the air tools 10 and 110 according to the present invention, the air tools 10 and 110 are not limited to the belt-type grinding tools, and other air tools such as an air impact wrench. It can also be a tool.
  • Air tool (belt type grinding tool) 10 Air motor 12; Air supply port 12-1; Exhaust port 12-2; Output shaft 14; Tool housing 20; Air motor housing 21; Compressed air inlet 21-1; -2; rear opening end 22; supply / exhaust pipe accommodating part 24; grip part 26; side wall 28; recess 30; upper surface wall 32; lower wall 34; supply / exhaust pipe 40; Supply outlet 41-2; Supply inlet 41-3; Exhaust pipe 42; Exhaust flow path 42-1; Exhaust inlet 42-2; Exhaust outlet 42-3; Intermediate portion 42-4; First intermediate portion 42-4a Second intermediate portion 42-4b; pin insertion hole 44; step 46; seal surface 47; opening 48; inclined contact surface 49; seal member 50; seal member 52; joint 54; 56; valve 60; valve seal member 62; Rod 63; rear end 63-1; tip 63-2; spring 64; valve control member 66; insertion hole 66-1; rear end surface 66-2; valve operation lever 70; operation surface 70-1; 70-2; pivot shaft 72; screw shaft 74;

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Portable Power Tools In General (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Auxiliary Devices For Machine Tools (AREA)

Abstract

Le problème décrit par la présente invention est de fournir un outil pneumatique dans lequel le conduit d'échappement est conçu de façon à réduire le refroidissement d'un logement du fait de la détente adiabatique de l'air d'échappement. La solution selon l'invention consiste en un outil pneumatique entraîné par un moteur pneumatique (12) comportant : un logement d'outil (20) comprenant une partie de logement de moteur pneumatique (21) qui loge le moteur pneumatique (12), et une partie de logement de conduit d'alimentation/échappement (24) qui s'étend de la partie de logement de moteur pneumatique (21) à une extrémité ouverte arrière (22) ; et un conduit d'alimentation (41) et un conduit d'échappement (42) qui sont disposés dans la partie de logement de conduit d'alimentation/échappement (24) du logement d'outil (20). Dans cet outil pneumatique, le conduit d'échappement (42) et la partie de logement de conduit d'alimentation/échappement (24) sont formés séparément. En outre, un espace est formé entre le conduit d'échappement (42) et la partie de logement de conduit d'alimentation/échappement (24), ce qui améliore une propriété d'isolation thermique entre le conduit d'échappement (42) et la partie de logement de conduit d'alimentation/échappement (24).
PCT/JP2014/066815 2013-06-26 2014-06-25 Outil pneumatique WO2014208589A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN201480034943.4A CN105307822B (zh) 2013-06-26 2014-06-25 气动工具
KR1020167001644A KR101921391B1 (ko) 2013-06-26 2014-06-25 에어 공구
JP2015524077A JP6185585B2 (ja) 2013-06-26 2014-06-25 エア工具
EP14818561.4A EP3015225B1 (fr) 2013-06-26 2014-06-25 Outil pneumatique

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2013-133982 2013-06-26
JP2013133982 2013-06-26

Publications (1)

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WO2014208589A1 true WO2014208589A1 (fr) 2014-12-31

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PCT/JP2014/066815 WO2014208589A1 (fr) 2013-06-26 2014-06-25 Outil pneumatique

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EP (1) EP3015225B1 (fr)
JP (1) JP6185585B2 (fr)
KR (1) KR101921391B1 (fr)
CN (1) CN105307822B (fr)
TW (1) TWI568549B (fr)
WO (1) WO2014208589A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017155107A1 (fr) * 2016-03-11 2017-09-14 日東工器株式会社 Outil de meulage du type à bande

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4660329A (en) * 1980-10-20 1987-04-28 Hutchins Manufacturing Company Powered abrading tool
JPH01171781A (ja) * 1987-12-26 1989-07-06 Nakanishi Shika Kikai Seisakusho:Kk エアーツールの接続装置
JPH07314315A (ja) * 1994-05-27 1995-12-05 Uriyuu Seisaku Kk エアーモータの排気の温度低下防止機構
JP2001138267A (ja) 1999-11-16 2001-05-22 Kuken:Kk エアツールにおける消音装置
JP2002505623A (ja) * 1998-04-20 2002-02-19 スナップ−オン ツールズ カンパニー 動力手工具用交換式グリップ
JP2006289607A (ja) * 2006-08-03 2006-10-26 Nitto Kohki Co Ltd 打撃工具
JP2008088933A (ja) * 2006-10-04 2008-04-17 Max Co Ltd エアモータ及びエアモータ付き空気圧工具
JP2009034753A (ja) * 2007-07-31 2009-02-19 Nitto Kohki Co Ltd エア工具

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE503847C2 (sv) * 1994-10-10 1996-09-16 Atlas Copco Tools Ab Handtag till ett pneumatiskt kraftverktyg
EP1250217B1 (fr) * 2000-01-27 2006-06-14 S.P. Air Kabusiki Kaisha Outil rotatif pneumatique
US6916235B2 (en) * 2003-07-08 2005-07-12 Nitto Kohki Co., Ltd. Hand-held endless belt abrading machine
JP3826133B2 (ja) * 2003-12-16 2006-09-27 日東工器株式会社 ベルト式研削工具
JP3910944B2 (ja) * 2003-07-08 2007-04-25 日東工器株式会社 手持ち式無端ベルト駆動式切削工具
JP4487856B2 (ja) * 2005-05-30 2010-06-23 日立工機株式会社 エア工具
JP4847363B2 (ja) * 2007-02-09 2011-12-28 日東工器株式会社 無端ベルト式研削工具
US20090258584A1 (en) * 2008-04-10 2009-10-15 X'pole Precision Tools, Inc. Multi-Shell Air-Tight Compartmentalized Casings

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4660329A (en) * 1980-10-20 1987-04-28 Hutchins Manufacturing Company Powered abrading tool
JPH01171781A (ja) * 1987-12-26 1989-07-06 Nakanishi Shika Kikai Seisakusho:Kk エアーツールの接続装置
JPH07314315A (ja) * 1994-05-27 1995-12-05 Uriyuu Seisaku Kk エアーモータの排気の温度低下防止機構
JP2002505623A (ja) * 1998-04-20 2002-02-19 スナップ−オン ツールズ カンパニー 動力手工具用交換式グリップ
JP2001138267A (ja) 1999-11-16 2001-05-22 Kuken:Kk エアツールにおける消音装置
JP2006289607A (ja) * 2006-08-03 2006-10-26 Nitto Kohki Co Ltd 打撃工具
JP2008088933A (ja) * 2006-10-04 2008-04-17 Max Co Ltd エアモータ及びエアモータ付き空気圧工具
JP2009034753A (ja) * 2007-07-31 2009-02-19 Nitto Kohki Co Ltd エア工具
JP4912976B2 (ja) 2007-07-31 2012-04-11 日東工器株式会社 エア工具

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017155107A1 (fr) * 2016-03-11 2017-09-14 日東工器株式会社 Outil de meulage du type à bande
KR20180107219A (ko) * 2016-03-11 2018-10-01 니토 코키 가부시키가이샤 벨트식 연삭 공구
GB2562436A (en) * 2016-03-11 2018-11-14 Nitto Kohki Co Belt-type grinding tool
KR102083156B1 (ko) * 2016-03-11 2020-03-02 니토 코키 가부시키가이샤 벨트식 연삭 공구
GB2562436B (en) * 2016-03-11 2021-02-24 Nitto Kohki Co Belt-type grinding tool

Also Published As

Publication number Publication date
TW201524709A (zh) 2015-07-01
JPWO2014208589A1 (ja) 2017-02-23
JP6185585B2 (ja) 2017-08-23
TWI568549B (zh) 2017-02-01
KR20160022891A (ko) 2016-03-02
EP3015225B1 (fr) 2018-10-17
CN105307822A (zh) 2016-02-03
EP3015225A1 (fr) 2016-05-04
EP3015225A4 (fr) 2017-03-01
KR101921391B1 (ko) 2018-11-22
CN105307822B (zh) 2018-05-18

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