WO2023067945A1 - 旋回式クランプ装置 - Google Patents
旋回式クランプ装置 Download PDFInfo
- Publication number
- WO2023067945A1 WO2023067945A1 PCT/JP2022/033996 JP2022033996W WO2023067945A1 WO 2023067945 A1 WO2023067945 A1 WO 2023067945A1 JP 2022033996 W JP2022033996 W JP 2022033996W WO 2023067945 A1 WO2023067945 A1 WO 2023067945A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- diameter hole
- housing body
- peripheral wall
- retainer
- axial direction
- Prior art date
Links
- 230000002093 peripheral effect Effects 0.000 claims description 42
- 238000009751 slip forming Methods 0.000 abstract description 2
- 239000012530 fluid Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/06—Work-clamping means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B5/00—Clamps
- B25B5/04—Clamps with pivoted jaws
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B5/00—Clamps
- B25B5/06—Arrangements for positively actuating jaws
- B25B5/061—Arrangements for positively actuating jaws with fluid drive
- B25B5/062—Arrangements for positively actuating jaws with fluid drive with clamping means pivoting around an axis parallel to the pressing direction
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/02—Mechanical layout characterised by the means for converting the movement of the fluid-actuated element into movement of the finally-operated member
- F15B15/06—Mechanical layout characterised by the means for converting the movement of the fluid-actuated element into movement of the finally-operated member for mechanically converting rectilinear movement into non- rectilinear movement
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/02—Mechanical layout characterised by the means for converting the movement of the fluid-actuated element into movement of the finally-operated member
- F15B15/06—Mechanical layout characterised by the means for converting the movement of the fluid-actuated element into movement of the finally-operated member for mechanically converting rectilinear movement into non- rectilinear movement
- F15B15/068—Mechanical layout characterised by the means for converting the movement of the fluid-actuated element into movement of the finally-operated member for mechanically converting rectilinear movement into non- rectilinear movement the motor being of the helical type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1433—End caps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1438—Cylinder to end cap assemblies
Definitions
- the present invention relates to a swivel clamping device that fixes workpieces, molds, tools, etc. of objects to be fixed to a table, a robot arm, etc. by rotating and lowering the clamp arm.
- Patent Document 1 Japanese Utility Model Laid-Open No. 5-52304.
- the prior art is configured as follows. 5 of Patent Document 1, a piston is inserted into a cylinder hole of a cylinder tube. A cylindrical rod cover is inserted into the tip of the cylindrical hole of the cylinder tube and protrudes upward from the cylinder tube. A piston rod projecting forward from the piston is inserted into the cylindrical hole of the rod cover, and the piston rod projects outside the cylinder cover. The rod cover is received from below by a stepped portion formed on the inner peripheral wall of the cylindrical hole of the cylinder tube, and is prevented from coming off from the cylindrical hole of the cylinder tube by a retaining ring.
- a threaded hole is radially penetrated through the cylinder wall of the cylinder tube, and a screw is screwed into the threaded hole.
- the tip of the screw is inserted into a recess formed in the outer peripheral wall of the rod cover.
- the rod cover is prevented from rotating with respect to the cylinder tube.
- the rod cover is fixed to the cylinder tube by a ring nut instead of the retaining ring.
- a snap ring attached to the inner peripheral wall of the cylinder tube between the cylinder tube and the rod cover prevents the rod cover from coming off from the cylinder tube.
- To attach the retaining ring between the cylinder tube and the rod cover there must be a space for inserting the retaining ring between the cylinder tube and the rod cover, a space for inserting the retaining ring, and a space for inserting the mounting tool. It is necessary to provide space, etc. Therefore, the radial dimension of the cylinder tube is increased.
- the screw and retaining ring receive the impact caused by the piston colliding with the rod cover.
- An object of the present invention is to provide a highly durable and compact swivel clamping device.
- the present invention for example, as shown in FIGS. 1 and 2, is configured as follows.
- a large-diameter hole 6, a medium-diameter hole 7, and a small-diameter hole 8 are formed in the housing body 2 in order from the distal end side to the proximal end side in the axial direction.
- a cylindrical projecting member 3 is hermetically inserted into the large-diameter hole 6 .
- a male threaded portion 11 formed on the outer peripheral wall of the projecting member 3 is screwed into a female threaded portion 10 formed on the inner peripheral wall of the intermediate hole 7 .
- a cylindrical retainer 15 is inserted into the intermediate hole 7 .
- a first key groove 20 is formed in the inner peripheral wall of the intermediate hole 7 in the axial direction.
- a second keyway 21 facing the first keyway 20 is formed in the outer peripheral wall of the retainer 15 in the axial direction.
- a key member 22 is mounted between the first keyway 20 and the second keyway 21 .
- a piston 25 is hermetically inserted into the small diameter hole 8 so as to be movable in the axial direction.
- a piston rod 30 protruding from the piston 25 toward the distal end in the axial direction protrudes outward from the protruding member 3 through the cylindrical hole 31 of the retainer 15 and the cylindrical hole 19 of the protruding member 3 .
- An engaging member 38 protrudes radially inward from the inner peripheral surface of the retainer 15 .
- the engaging member 38 is inserted into a spiral groove 39 and a linear groove 40 which are formed in the outer peripheral wall of the piston rod 30 so as to be continuous from the base end side in the axial direction.
- a part of the peripheral wall of the first keyway 20 is formed so as to be radially outward of the inner peripheral surface of the large diameter hole 6 .
- the present invention has the following effects. Since the protruding member is directly and firmly screwed into the housing body by means of the male threaded portion and the female threaded portion, the durability of the engaging portion between the protruding member and the housing body can be enhanced. Also, since there is no need to provide a separate member for connecting between the protruding member and the housing body, the swivel clamp device can be made small.
- FIG. 1 shows an embodiment of the present invention, and is a schematic cross-sectional view of a swivel clamping device.
- FIG. 2 is a diagram showing a clamping state of the swivel clamping device.
- FIG. 3 is an exploded view of the housing, projecting member, retainer, and key member.
- the housing 1 of the swivel clamp device has a housing body 2, a projecting member 3 and a cover member 4, and the housing body 2 is made of drawn aluminum.
- a cylinder hole 5 is formed in the housing body 2 .
- the cylinder hole 5 has a large-diameter hole 6, a medium-diameter hole 7, and a small-diameter hole 8 which are formed in order from the upper side (the distal end side in the axial direction).
- the lower part of the protruding member 3 is inserted into the large diameter hole 6 described above.
- a female threaded portion 10 is formed in the upper half portion of the medium diameter hole 7 , and a male threaded portion 11 formed on the protruding member 3 is screwed into the female threaded portion 10 . Therefore, the projecting member 3 is fixed to the housing body 2 while projecting upward from the housing body 2 .
- a housing groove 12 is formed in the circumferential direction above the male screw portion 11 of the projecting member 3 , and a sealing member 13 such as an O-ring is mounted in the housing groove 12 .
- the sealing member 13 With the protruding member 3 screwed into the housing body 2, the sealing member 13 is brought into close contact with the surface to be sealed formed by the inner peripheral surface of the large-diameter hole 6. A gap between the peripheral surface and the outer peripheral surface of the projecting member 3 is sealed.
- a cylindrical retainer 15 is inserted into the lower half of the intermediate hole 7 (see FIGS. 3A and 3B). 16 is received from below.
- the retainer 15 has a large diameter portion 17 and a small diameter portion 18 formed in order from the bottom.
- the small diameter portion 18 is inserted into the cylindrical hole 19 of the protruding member 3 .
- a first keyway 20 is vertically formed in the inner peripheral wall of the medium-diameter hole 7
- a second keyway 20 is formed on the outer peripheral wall of the large-diameter portion 17 of the retainer 15 at a position facing the first keyway 20 .
- a keyway 21 is formed.
- the deepest portion of the bottom surface of the first keyway 20 is set to be radially outward of the inner peripheral surface of the large-diameter hole 6 .
- a parallel pin serving as a key member 22 is mounted with a sliding gap between the first key groove 20 and the second key groove 21 (see FIG. 3B).
- the retainer 15 is provided with a passage groove 23 continuous with the second key groove 21 on the side of the small diameter portion 18 to facilitate entry of the key member 22 . As a result, the retainer 15 is circumferentially positioned with respect to the housing body 2 and prevented from rotating.
- a piston 25 is hermetically inserted into the small diameter hole 8 so as to be vertically movable (in the axial direction of the cylinder hole 5).
- a clamping chamber 26 is formed above the piston 25 and an unclamping chamber 27 is formed below the piston 25 .
- a clamp supply/discharge port 28 for supplying/discharging compressed air from a compressed air source is formed in the body portion of the housing body 2 , and the clamp supply/discharge port 28 communicates with the clamp chamber 26 .
- An unclamping supply/discharge port 29 is formed in the body portion of the housing body 2 below the clamping supply/discharge port 28 , and the unclamping supply/discharge port 29 communicates with the unclamping chamber 27 .
- a piston rod 30 projects upward from the piston 25, and the piston rod 30 is inserted into the tubular hole 31 of the retainer 15 and into the tubular hole 19 of the protruding member 3 in a hermetic manner so as to be vertically movable. be done.
- the piston rod 30 protrudes outward from the protruding member 3 .
- One end 33 a of a clamp arm 33 is screwed to the tip of the piston rod 30 .
- a pressing portion 34 is formed on the back surface of the other end portion 33 b of the clamp arm 33 , and the pressing portion 34 can come into contact with a work (an object to be fixed) 35 .
- a spherical engagement ball (engagement member) 38 is mounted in a recess 37 formed in the inner peripheral wall of the retainer 15 .
- the engagement ball 38 protrudes radially inward from the inner peripheral surface of the retainer 15 .
- the engaging ball 38 is inserted into a spiral groove 39 and a linear groove 40 which are continuously formed in the outer peripheral wall of the piston rod 30 from below.
- a stepped portion 41 is formed in the circumferential direction above the spiral groove 39 on the outer peripheral wall of the piston rod 30 . Further, a projecting portion 42 projects radially inward from the inner peripheral surface of the cylindrical hole 19 of the projecting member 3 .
- a housing groove 43 is formed in the circumferential direction on the inner peripheral wall of the cylindrical hole 19 and below the protrusion 42 .
- a shock absorbing member 44 such as a spring member made of rubber, resin, or metal is mounted in the accommodation groove 43 .
- the swivel clamping device described above operates as follows.
- compressed air pressure fluid
- compressed air pressure fluid
- the compressed air in the unclamping chamber 27 moves the piston 25 and the piston rod 30 to the upper limit position, and the engaging portion formed at the stepped portion 41 of the piston rod 30 is received by the impact absorbing member 44 from above.
- the compressed air in the unclamping chamber 27 is discharged to the outside through the unclamping supply/discharge port 29, and the compressed air is supplied from the compressed air source. Air is supplied to the clamping chamber 26 through a clamping supply/discharge port 28 .
- the compressed air in the clamping chamber 26 moves the piston 25 downward, and the piston 25 is rotated clockwise by the spiral groove 39 and the engagement ball 38 in plan view.
- the piston 25 is then moved straight downward by the linear groove 40 and the engaging ball 38 .
- the clamp arm 33 presses the workpiece 35 placed on the table T from above, and the descent of the piston 25 is stopped. As a result, the swivel clamping device is switched from the unclamped state shown in FIG. 1 to the clamped state shown in FIG.
- the above embodiment has the following advantages. Since the projecting member 3 is directly and firmly screwed into the housing body 2 by the female threaded portion 10 and the male threaded portion 11 of the housing body 2, the projecting member 3 and the housing body 2 are connected. There is no need to separately provide a member for As a result, the radial dimensions of the housing body 2 and the protruding member 3 can be reduced. As a result, the swivel clamping device can be made small.
- the bottom surface of the first keyway 20 is radially outward of the inner peripheral surface of the large-diameter hole 6 of the housing body 2. is formed as Therefore, the key member 22 is arranged in a well-balanced position straddling the radially outer and inner sides of the large-diameter hole 6 with which the housing body 2 and the projecting member 3 abut.
- the thickness of the tubular wall of the housing body 2 and the thickness of the tubular wall of the retainer 15 can be made small, so that the radial dimensions of the housing body 2 and the retainer 15 can be made small.
- the overall dimensions of the swivel clamping device can be made small.
- the peripheral wall of the spiral groove 39 of the piston rod 30 presses the retainer 15 in the circumferential direction via the engagement balls 38 .
- the retainer 15 is reliably received by the housing body 2 via the key member 22 and prevented from rotating. Therefore, it is difficult for the pressing force to be transmitted in the circumferential direction to the projecting member 3, which is a member different from the retainer 15. As shown in FIG. Therefore, loosening of the threaded portion between the housing body 2 and the protruding member 3 due to a pressing force acting in the circumferential direction on the threaded portion is prevented. Therefore, it is possible to prevent abrasion and breakage of the threaded portion and peripheral members caused by loosening, and to increase the durability of the swivel clamp device.
- the thread groove of the female screw portion 10 is formed in a plurality of turns in the medium-diameter hole 7 of the housing body 2 .
- the thread groove of the female screw portion 10 of the present invention is formed longer than the thread groove of the screw hole formed in the cylinder tube wall in the conventional swivel clamp device described above. Therefore, by screwing the female threaded portion 10 to the male threaded portion 11 of the protruding member 3 at an engagement portion having a large area, a large frictional force can act on the engagement portion. Therefore, even if the impact when the piston rod 30 collides with the protruding member 3 acts on the engaging portion, it is possible to prevent the engaging portion from loosening. Therefore, it is possible to prevent wear and damage to the engaging portion and its surrounding members due to loosening, so that it is possible to improve the durability of the swivel clamping device.
- the pressurized fluid may be another gas or a liquid such as pressurized oil or water instead of the exemplified compressed air.
- the housing body 2 may be made of other metals such as iron or other materials instead of aluminum.
- the housing body 2 is not limited to a drawn material, and may be a member formed by machining.
- a gap is formed between the projecting member 3 and the retainer 15 .
- the peripheral wall of the spiral groove 39 is less likely to transmit to the projecting member 3 the pressing force that acts on the retainer 15 in the direction around the axis via the engagement balls 38 .
- the threaded portion between the housing body 2 and the projecting member 3 is prevented from loosening due to the pressing force in the circumferential direction acting on the threaded portion. Therefore, wear and damage caused by loosening can be prevented, and the durability of the swivel clamp device can be increased.
- the engaging member may be a member having another shape such as a substantially cylindrical shape or a rectangular shape.
- the engaging member may protrude from the outer peripheral wall of the piston rod 30 .
- a linear groove and a spiral groove are provided in the peripheral wall of the retainer 15 so as to be continuously continuous from the lower side (so as to penetrate the peripheral wall).
- the key member 22 is not limited to being configured by a columnar parallel pin, and may be a polygonal columnar pin or a spherical member. Further, the provision of only one key member 22 is not necessary, and a plurality of key members may be provided at predetermined intervals on the peripheral wall of the retainer.
- the impact absorbing member 44 is attached to the protrusion 42 of the protrusion member 3 instead of being attached to the inner peripheral wall of the large diameter hole 6 of the housing body 2 , the lower end of the retainer 15 , the upper portion of the piston 25 , and the steps of the piston rod 30 . You may make it mount
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Jigs For Machine Tools (AREA)
- Clamps And Clips (AREA)
Abstract
Description
特許文献1の図5に示す旋回式クランプ装置では、シリンダチューブの筒孔内にピストンが挿入される。そのシリンダチューブの筒孔先端部に筒状のロッドカバーが挿入されて当該シリンダチューブから上方に突設される。そのロッドカバーの筒孔に、ピストンから先端側に突設されるピストンロッドが挿入され、そのピストンロッドがシリンダカバーの外側に突出している。そのロッドカバーは、シリンダチューブの筒孔の内周壁に形成される段差部に下方から受け止められ、止め輪によってシリンダチューブの筒孔から抜け止めされている。また、シリンダチューブの筒壁にネジ孔が径方向に貫通され、そのネジ孔にネジが螺合される。そのネジの先端部が、ロッドカバーの外周壁に形成される凹部に挿入されている。これにより、シリンダチューブに対してロッドカバーが回り止めされる。
また、特許文献1の図1の旋回式クランプ装置では、上記の止め輪に代えて、リングナットによってロッドカバーがシリンダチューブに固定されている。
上記シリンダチューブとロッドカバーとの間であってシリンダチューブの内周壁に装着される止め輪によってロッドカバーが当該シリンダチューブから抜け止めされる。その止め輪をシリンダチューブとロッドカバーとの間に装着するには、シリンダチューブとロッドカバーとの間に止め輪を挿入する空間と、挿入作業のための空間と、取り付け工具を挿入するための空間などを設ける必要がある。このため、シリンダチューブの径方向の寸法が大きくなる。また、ピストンが先端限界位置に移動したときに、ピストンがロッドカバーに衝突したことによる衝撃をネジや止め輪が受け止めることになる。その衝撃に耐える構造とするために、例えば、ネジの径寸法を極力大きくしたり、ネジ溝の巻き数を増やしたりするなどの緩みを防止する構造が必要となるほか、止め輪の厚みや幅寸法を大きくして耐久性を高くする必要がある。このため、シリンダチューブの筒壁が十分な肉厚となるように設定される必要がある。従って、旋回式クランプ装置の径方向の寸法は大きくなる。
また、特許文献1の図1に示す旋回式クランプ装置では、ロッドカバーの外周面とシリンダチューブの内周面との間にリングナットが上方から装着される。このため、そのリングナットをシリンダチューブとロッドカバーとの間に挿入するための空間と工具を挿入するための空間などを設ける必要がある。従って、旋回式クランプ装置の径方向の寸法が大きくなる。
本発明の目的は、耐久性が高くてコンパクトな旋回式クランプ装置を提供することにある。
ハウジング本体2内に大径孔6と中径孔7と小径孔8が軸方向の先端側から基端側に順に形成される。前記大径孔6に筒状の突出部材3が保密状に挿入される。前記突出部材3の外周壁に形成される雄ネジ部11が、前記中径孔7の内周壁に形成される雌ネジ部10に螺合される。前記中径孔7内に筒状のリテーナ15が挿入される。前記中径孔7の内周壁に第1キー溝20が前記軸方向に形成される。前記第1キー溝20に対面する第2キー溝21が前記リテーナ15の外周壁に前記軸方向に形成される。前記第1キー溝20と前記第2キー溝21との間にキー部材22が装着される。前記小径孔8にピストン25が保密状で前記軸方向に移動可能に挿入される。前記ピストン25から前記軸方向の先端側に突設されるピストンロッド30が、前記リテーナ15の筒孔31及び前記突出部材3の筒孔19を通って当該突出部材3から外方に突出する。前記リテーナ15の内周面から係合部材38が径方向の内方にむけて突設される。前記ピストンロッド30の外周壁に前記軸方向の基端側から順に連続するように形成される螺旋溝39と直線溝40には、前記係合部材38が挿入される。前記第1キー溝20の周壁の一部は前記大径孔6の内周面よりも径方向の外方となるように形成されている。
上記の突出部材がハウジング本体に雄ネジ部と雌ネジ部とによって直接かつ強固に螺合されるので突出部材とハウジング本体との係合部分の耐久性を高くすることができる。また、突出部材とハウジング本体との間に連結させるための別途部材を備える必要がないので旋回式クランプ装置を小さく作ることができる。
上記の旋回式クランプ装置のハウジング1は、ハウジング本体2と突出部材3と蓋部材4とを有し、ハウジング本体2がアルミニウム製の引き抜き材によって構成されている。そのハウジング本体2内にシリンダ孔5が形成される。そのシリンダ孔5は上側(軸方向の先端側)から順に形成される大径孔6,中径孔7,小径孔8を有する。
図1の初期状態(アンクランプ状態)では、クランプ室26から圧縮空気(圧力流体)が排出されると共に、アンクランプ室27に圧縮空気(圧力流体)が供給されている。そのアンクランプ室27の圧縮空気によってピストン25およびピストンロッド30が上限位置に移動され、ピストンロッド30の段差部41に形成される係合部が衝撃吸収部材44に上方から受け止められている。
上記の突出部材3が、その雌ネジ部10とハウジング本体2の雄ネジ部11とによって当該ハウジング本体2に直接かつ強固に螺合されるので、突出部材3とハウジング本体2との間に連結させるための部材を別途備える必要がない。これにより、ハウジング本体2および突出部材3の径方向の寸法を小さくできる。その結果、旋回式クランプ装置を小さく作ることができる。
圧力流体は、例示した圧縮空気に代えて、他の気体または圧油や水等の液体であってもよい。
上記ハウジング本体2はアルミニウムに代えて、他の金属、例えば鉄、または他の素材で形成してもよい。そのハウジング本体2は、引き抜き材に限られず、機械加工によって形成される部材であってもよい。
上記の突出部材3をハウジング本体2に螺合することにより、突出部材3がリテーナ15を介してハウジング本体2の段差部16に受け止められることに代えて、突出部材3がキー部材22介してハウジング本体2(第1キー溝20の下端壁)に、または、直接ハウジング本体2に受け止められるようにしてもよい。この場合、突出部材3とリテーナ15との間に隙間が形成されることになる。これにより、ピストン25等の上下方向への移動によって、螺旋溝39の周壁が係合ボール38を介してリテーナ15を軸心回りの方向に作用させる押圧力が突出部材3に伝達されにくくなる。その結果、ハウジング本体2と突出部材3との螺合部分に周方向への押圧力が作用することによる当該螺合部分の緩みが防止される。従って、緩みによって生じる摩耗や破損を防止して旋回式クランプ装置の耐久性を高くすることができる。
上記係合部材は、球状の係合ボール38に代えて、略円柱状や矩形など他の形状の部材であってもよい。
上記の係合部材がリテーナ15に設けられることに代えて、ピストンロッド30の外周壁から突設されるようにしてもよい。この場合、リテーナ15の周壁に直線溝と螺旋溝が下側から順に連続するように(周壁を貫通するように)設けられる。
上記キー部材22は、円柱状の平行ピンによって構成されることに限られず、多角柱状のピンであってもよく、また、球状の部材であってもよい。また、キー部材22を1つだけ備えることに限られず、リテーナの周壁に所定の間隔をあけて複数個設けられるようにしてもよい。
上記衝撃吸収部材44は突出部材3の突起部42に装着されることに代えて、ハウジング本体2の大径孔6の内周壁、リテーナ15の下端部、ピストン25の上部、ピストンロッド30の段差部41に装着されるようにしてもよい。
その他に、当業者が想定できる範囲で種々の変更を行えることは勿論である。
3 突出部材
6 大径孔
7 中径孔
8 小径孔
10 雌ネジ部
11 雄ネジ部
15 リテーナ
20 第1キー溝
21 第2キー溝
22 キー部材
25 ピストン
30 ピストンロッド
31 筒孔
19 筒孔
38 係合ボール
39 螺旋溝
40 直線溝
Claims (1)
- ハウジング本体(2)と、
前記ハウジング本体(2)内に軸方向の先端側から基端側に順に形成される大径孔(6)と中径孔(7)と小径孔(8)と、
前記大径孔(6)に保密状に挿入されると共に、前記ハウジング本体(2)から前記軸方向の先端側に突設される筒状の突出部材(3)と、
前記突出部材(3)の外周壁に形成されると共に、前記中径孔(7)の内周壁に形成される雌ネジ部(10)に螺合される雄ネジ部(11)と、
前記中径孔(7)内に挿入される筒状のリテーナ(15)と、
前記中径孔(7)の内周壁に前記軸方向に形成される第1キー溝(20)と、
前記第1キー溝(20)に対面するように前記リテーナ(15)の外周壁に前記軸方向に形成される第2キー溝(21)と、
前記第1キー溝(20)と前記第2キー溝(21)との間に装着されるキー部材(22)と、
前記小径孔(8)に保密状で前記軸方向に移動可能に挿入されるピストン(25)と、
前記ピストン(25)から前記軸方向の先端側に突設されると共に、前記リテーナ(15)の筒孔(31)及び前記突出部材(3)の筒孔(19)を通って当該突出部材(3)から外方に突出するピストンロッド(30)と、
前記リテーナ(15)の内周面から径方向の内方にむけて突設される係合部材(38)と、
前記ピストンロッド(30)の外周壁に前記軸方向の基端側から順に形成される螺旋溝(39)と直線溝(40)であって、前記係合部材(38)が挿入される螺旋溝(39)と直線溝(40)と、を備え、
前記第1キー溝(20)の周壁の一部が前記大径孔(6)の内周面よりも径方向の外方となるように形成される、ことを特徴とする旋回式クランプ装置。
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KR1020247008850A KR20240045316A (ko) | 2021-10-18 | 2022-09-12 | 선회식 클램프 장치 |
CN202280068935.6A CN118201736A (zh) | 2021-10-18 | 2022-09-12 | 回旋式夹紧装置 |
EP22883256.4A EP4420826A1 (en) | 2021-10-18 | 2022-09-12 | Rotary clamp device |
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JPH0552304U (ja) | 1991-12-18 | 1993-07-13 | エスエムシー株式会社 | ロータリクランプシリンダ |
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CN110529455A (zh) * | 2019-09-12 | 2019-12-03 | 无锡君帆科技有限公司 | 一种活塞杆可旋转的液压油缸 |
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TW405483U (en) * | 1999-04-13 | 2000-09-11 | Shen Tzung Lin | Plunger type rotary chuck |
TW544361B (en) * | 2002-04-03 | 2003-08-01 | Kosmek Kk | Rotary clamp |
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JP6147623B2 (ja) * | 2013-09-17 | 2017-06-14 | 株式会社スギノマシン | タレット装置 |
CN110418693B (zh) * | 2017-04-05 | 2021-04-06 | 克斯美库股份有限公司 | 回转式夹紧装置 |
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- 2022-09-12 WO PCT/JP2022/033996 patent/WO2023067945A1/ja active Application Filing
- 2022-09-12 CN CN202280068935.6A patent/CN118201736A/zh active Pending
- 2022-09-12 JP JP2023555029A patent/JPWO2023067945A1/ja active Pending
- 2022-09-12 KR KR1020247008850A patent/KR20240045316A/ko unknown
- 2022-09-12 EP EP22883256.4A patent/EP4420826A1/en active Pending
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US4508327A (en) * | 1982-01-15 | 1985-04-02 | Maschinenfabrik Hilma Gmbh | Swing clamp |
JPH0552304U (ja) | 1991-12-18 | 1993-07-13 | エスエムシー株式会社 | ロータリクランプシリンダ |
JPH0556334U (ja) * | 1992-01-20 | 1993-07-27 | エヌオーケー株式会社 | スイングクランプ装置 |
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EP4420826A1 (en) | 2024-08-28 |
TWI828357B (zh) | 2024-01-01 |
CN118201736A (zh) | 2024-06-14 |
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