WO2002088570A1 - Ressort a gaz - Google Patents
Ressort a gaz Download PDFInfo
- Publication number
- WO2002088570A1 WO2002088570A1 PCT/JP2002/003469 JP0203469W WO02088570A1 WO 2002088570 A1 WO2002088570 A1 WO 2002088570A1 JP 0203469 W JP0203469 W JP 0203469W WO 02088570 A1 WO02088570 A1 WO 02088570A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- gas
- grease
- filling chamber
- cylinder body
- gas spring
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/36—Special sealings, including sealings or guides for piston-rods
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/43—Filling or drainage arrangements, e.g. for supply of gas
- F16F9/432—Filling or drainage arrangements, e.g. for supply of gas via piston rod sealing or guiding means
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T409/00—Gear cutting, milling, or planing
- Y10T409/30—Milling
- Y10T409/309352—Cutter spindle or spindle support
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T409/00—Gear cutting, milling, or planing
- Y10T409/30—Milling
- Y10T409/309352—Cutter spindle or spindle support
- Y10T409/309408—Cutter spindle or spindle support with cutter holder
- Y10T409/309464—Cutter spindle or spindle support with cutter holder and draw bar
Definitions
- the present invention relates to a gas spring, and more particularly to a gas spring in which a ring member is mounted near a seal member for sealing a filled compressed gas, and a grease filling chamber is formed between the seal member and the ring member.
- gas springs used for various machines generally include a cylinder body, a rod member slidably fitted in the cylinder body, and a compressed gas (mainly nitrogen gas) formed inside the cylinder body. ) Is provided with a gas filling chamber and the like. The rod member is advanced by the compressed gas in the gas filling chamber.
- a compressed gas mainly nitrogen gas
- the gas filling chamber is filled with a high-pressure (for example, 7-1 OMPa) compressed gas in order to strongly advance and drive the rod member.
- a seal member is mounted between the cylinder body and the rod member to seal the filled compressed gas so as not to leak.
- An object of the present invention is to configure a grease filling chamber for filling grease so as to be easily formed, to extend the life of a gas spring, and the like. Disclosure of the invention
- the gas spring of the present invention is a gas spring having a cylinder body, a rod member slidably fitted in the cylinder body, and a gas filling chamber formed inside the cylinder body and filled with a compressed gas.
- a ring-shaped grease filling chamber formed between the sealing member and the ring member and filled with grease.
- the ring member Before fitting the rod member into the cylinder body, press the ring member into the end of the gas filling chamber near the seal member, and place the grease filling chamber between the seal member and the ring member. After forming and filling the grease filling chamber with grease, the rod member is fitted inside the cylinder body. In the use state of the gas spring, the ring member is urged toward the seal member side by the gas pressure of the compressed gas, so that the grease does not leak from the grease filling chamber.
- a grease filling chamber can be easily formed by forming a grease filling chamber between the seal member and the ring member. When the gas spring is used, grease is supplied from the grease filling chamber. The life of the gas spring can be prolonged without losing grease between the gas spring and the member.
- the rod member may be provided so as to penetrate a cylinder body, and the seal member, the ring member, and the grease filling chamber may be provided on both ends of a gas filling chamber.
- the seal member, the ring member, and the grease filling chamber may be provided on both ends of a gas filling chamber.
- the rod member slides at both ends of the cylinder body, thereby preventing the compressed gas from leaking to both ends of the gas filling chamber. It is necessary to provide a sealing member respectively.
- Two ring members Is mounted on both ends of the gas filling chamber, a grease filling chamber is formed between each seal member and the ring member, and grease can be filled.
- the ring member may be rotatably fitted on the rod member, and an outer peripheral portion of the ring member may be fitted into an annular groove on an inner peripheral surface of the cylinder body. In this case, the movement of the ring member in the axial direction is locked, and grease hardly leaks from the grease filling chamber.
- the ring member is formed in a continuous annular shape with a synthetic resin material, when the ring member is press-fitted into the annular groove, the ring member can be elastically deformed and mounted relatively easily in the annular groove.
- the ring member when configured to be able to reduce the diameter through a dividing portion at one point in the circumferential direction, when the ring member is press-fitted into the annular groove, the diameter of the ring member is reduced to make it relatively easy. Can be mounted in the annular groove.
- FIG. 1 is a longitudinal sectional view of a tool fixing device including a gas spring according to an embodiment of the present invention
- FIG. 2 is a longitudinal sectional view of a gas spring
- FIG. 3 is an enlarged sectional view of a main part of a grease filling chamber (upper side of the gas filling chamber).
- Fig. 4 is an enlarged cross-sectional view of the main part of the grease filling chamber (gas filling chamber lower end)
- Fig. 5 is an end view of the ring member (gas filling chamber upper end)
- Fig. 6 is a ring member (gas filling chamber lower end).
- the present invention is applied to a tool fixing device for releasably fixing a tool to a tip of a main shaft of a machine tool.
- the main shaft 2 of the machine tool is rotatably supported via a plurality of bearings 2a, and a tapered tool holding portion 10 is formed at the front end portion, the diameter of which increases toward the front end. ing.
- the tool fixing device 1 includes a frame 4 for supporting the main shaft, a collet 5 for releasably engaging the engaged portion 3 a at the base end of the tool 3, a draw bar 6 linked to the collet 5, and a drawer 6. Connect the drawbar 6 to the proximal end (tool fixed side, ie
- the gas spring 7, which is unique to the present application, and the drawbar 1, which is staken to the urging force of the gas spring 7, can be driven to the tip side (tool fixing release side, that is, downward in FIG. 1). It is composed of a mechanism 8 and a coil 9 for driving the main shaft 2 to rotate.
- the main shaft 2 accommodates the tool holder 10 and the collet 5?
- a through hole 11 through which the drawer 6 is inserted, and an accommodation hole 13 that accommodates the gas spring 7 are formed in series from the distal end to the proximal end.
- a tapered hole 11a for deforming the divided body of the collet 5 to the radially reduced side is formed at the tip of the accommodation hole 11a.
- the receiving hole 13 is composed of a rod sliding hole 13 a into which the large diameter portion 21 b of the rod member 21 is slidably fitted, and a rod sliding hole 13.
- a cylinder housing hole 13b formed slightly smaller in diameter than a and accommodating the cylinder body 20 of the gas spring 7, a concave hole 1 3c connected to the cylinder housing hole 13b, and a concave hole 13
- the cylindrical holes 13 d having a smaller diameter than the above are arranged in series from the base end side.
- the cylindrical member 14 is fitted in the concave hole 13 c, and the distal end surface of the cylinder body 20 abuts on the proximal end surface of the cylindrical member 14.
- a sleeve 15 is fixed to the distal end portion of the main shaft 2 by externally screwing a base end portion thereof.
- a plurality of holes 16 are formed between the distal end portion of the sleeve 15 and the main shaft 2, and the base end of the pressing member 17 having a distal end protruding toward the distal end of the main shaft 2 in each hole 16 is freely movable.
- the pressing member 17 is urged to the distal end side by a plurality of plate panels 18 mounted in the holes 16.
- the tool 3 has the engaging portion 3a, the taper shaft portion 3b, and a large-diameter disk portion 3c provided on the tip side of the taper shaft portion 3b.
- the collet 5 is composed of an elastic divided body having a distal end divided into three or four parts.
- the collet 5 has a shaft hole 5 a through which the drawer 6 passes, and a shaft hole 5 provided at the front end of the shaft hole 5 a. It has a large-diameter hole 5b larger than a, and a locking portion 6a fixed to the tip of the draw bar 6 is fitted in the large-diameter hole 5b.
- the locking portion 6a is locked to the step 5c at the boundary between the shaft hole 5a and the large diameter hole 5b, and the collet 5 also moves to the base end side.
- the taper The split body on the tip end side of the collet 5 is closed by the hole 11a and enters the back side of the receiving hole 11 and engages with the engaging portion 3a of the tool 3 on the way, and thereafter, the engaging portion 3a Is pulled toward the base end side, and the tool 3 is fixed with its tapered shaft portion 3b in contact with the tool holding portion 10.
- the disc member 3c of the tool 3 is urged toward the distal end by the pressing member 17 urged by the plate panel 18.
- the draw bar 6 moves to the fixing releasing side, the locking of the locking portion 6a to the step portion 5c is released, and the pressing member 17 pushes the tool 3 toward the distal end to release the fixing.
- the elastic split body at the distal end of the collet 5 also moves to the distal end while being opened, so that the engagement between the engaging portion 3a of the tool 3 and the collect 5 is released, and the tool 3 is released.
- the drawbar 6 is urged from the unlocking position to the tool fixing position by urging the drawbar 6 to the tool fixing side by the gas spring 7 via the engaging shaft fixed to the base end thereof, and
- the tool 3 can be fixed to the tool holding portion 10 by holding the draw bar 6 at the tool fixing position.
- the fixing release mechanism 8 has a hydraulic cylinder 50 driven and controlled by a drive control unit including a hydraulic supply source. 1 is driven from the advanced position to the retracted position, and the draw bar 6 connected to the rod member 21 is driven to the fixed release side.
- the gas spring 7 includes a cylinder body 20 fitted inside the main shaft 2 and a rod member 21 slidably fitted inside the cylinder body 20 and penetrating through the cylinder body 20.
- a gas filling chamber 23 formed inside the cylinder body 20 to be filled with the compressed gas 22; and a locking mechanism 24 for restricting the rod member 21 from moving out of the predetermined stroke or more by the compressed gas 22.
- two seal members 25, 26 for sealing between the cylinder body 20 and the rod member 21 at both ends of the gas filling chamber 23, and the gas near these seal members 25, 26.
- two ring members 27, 28 partitioning the gas filling chamber 23, and between the sealing members 25, 26 and the ring members 27, 28 and the grease 44 2 grease filling chambers 2 9, 30 filled with And so on.
- the cylinder body 20 At the upper end and lower end of the cylinder body 20, there are provided rod holes 31 and 32 into which rod members 21 are slidably fitted, respectively.
- the inside of the cylinder body 20 is filled with gas.
- a chamber 23 is formed, and the gas filling chamber 23 is filled with a high-pressure (7-1 OMPa) compressed gas 22 (for example, nitrogen gas).
- a high-pressure (7-1 OMPa) compressed gas 22 for example, nitrogen gas.
- an annular seal mounting groove 33 for mounting a seal member 25 is formed on the inner peripheral surface of the cylinder body 20 at the upper end side of the gas filling chamber 23.
- a tapered groove 34 connected to the lower end of the groove 33 and having a smaller diameter as it goes down, and an annular groove 35 connected to the lower end of the tapered groove 34 and having a diameter larger than the lower end of the taper groove 34 are also formed.
- an annular seal mounting groove 36 for mounting a seal member 26 is also formed on the inner peripheral surface of the cylinder body 20 at the lower end side of the gas filling chamber 23.
- An annular groove 37 connected to the upper end of the seal mounting groove 36 and an annular groove 38 having a diameter larger than that of the annular groove 37 are also formed. Seal members 39 and 40 are mounted between the cylinder body 20 and the cylinder housing holes 13b.
- the rod member 21 includes a connecting portion 2 la connected to the hydraulic cylinder 50 of the fixing release mechanism 8, a large-diameter portion 2 1 b slidably fitted in the rod sliding hole 13 a, and a rod 2. ⁇ Medium diameter part 2 1c slidably fitted in through hole 3 1, and rod part slidably fitted in rod ⁇ through hole 32 and connected to draw bar 6 at lower end 21 d are integrally formed in series from the upper side.
- the large-diameter portion 21b reaches the lower end of the rod sliding hole 13a, and the large-diameter portion 21b is the mouth sliding hole 13
- the rod member 21 is locked to the stepped portion 13 e at the boundary between a and the cylinder housing hole 13 b, and further downward movement of the rod member 21 is restricted.
- the locking mechanism 24 has an annular collar 41 fitted inside the tubular member 15 and a stop ring 42 fitted externally at the center of the rod 21 d.
- An annular groove 41 a is formed on the inner peripheral surface of the lower half of the collar 41, and when the mouth member 21 has advanced beyond a predetermined stroke, the stop ring 42 is formed with the annular groove of the collar 41. By engaging with 41 a, the upward movement of the rod member 21 is locked.
- annular seal member 25 is mounted in the seal mounting groove 33 on the upper end side of the gas filling chamber 23.
- the ring member 27 is press-fitted into the annular groove 35 from below.
- the ring member 27 is formed of a synthetic resin material in a continuous annular shape.
- the taper groove 34 is separated from the gas filling chamber 23 by the ring member 27, and the grease filling chamber 29 is formed by the seal member 25, the ring member 27, and the taper groove 34.
- an annular seal member 26 is also mounted in the seal mounting groove 36 on the lower end side of the gas filling chamber 23.
- the ring member 28 is press-fitted into the annular groove 38 from above in a state where the mouth member 21 is not fitted in the cylinder body 20.
- the ring member 28 is made of a synthetic resin material and is formed in a continuous annular shape.
- the annular groove 37 is separated from the gas filling chamber 23 by the ring member 28, and the grease filling chamber 30 is formed by the seal member 26, the ring member 28, and the annular groove 37.
- the mouth member 21 is fitted in the cylinder body 20.
- the ring members 27 and 28 are slidably fitted to the rod member 21.
- the ring members 27, 28 are press-fitted into the annular grooves 35, 38, respectively, before the rod member 21 is fitted inside the cylinder body 20.
- the ring members 27, 28 since each of the ring members 27, 28 is made of a synthetic resin material, the ring members 27, 28 can be relatively easily mounted in the annular grooves 35, 38.
- the outer peripheral portions of the ring members 27, 28 After being mounted in the annular grooves 35, 38, the outer peripheral portions of the ring members 27, 28 are fitted into the annular grooves 35, 38, and the ring members 27, 28 are respectively in the axial center 43 direction. Is locked.
- grease 44 is supplied between the rod member 21 and the seal members 25, 26 from the grease filling chambers 29, 30 as the rod member 21 advances and retreats.
- Grease 4 4 acts as a lubricant.
- the annular grooves 35, 38 are formed on the inner peripheral surface of the cylinder body 20, and the ring members 27, 28 are press-fitted when the gas spring 7 is assembled.
- the grease filling chambers 29, 30 can be easily formed between the seal members 25, 26 and the ring members 27, 28 by being mounted in the grooves 35, 38. Therefore, the grease filling chamber 29, 30 is filled with the grease 44, and the grease 44 is supplied from the grease filling chamber 29, 30 when the gas spring 7 is in use. The grease 44 between the gas spring 7 and the seal members 25 and 26 is not lost, and the life of the gas spring 7 can be extended.
- the ring members 27 and 28 are urged by the compressed gas 22 toward the seal members 25 and 26, respectively, and the outer peripheral portions of the ring members 27 and 28 fit into the annular grooves 35 and 38, respectively. As a result, the movement of the ring members 27 and 28 in the direction of the axis 43 is locked, so that the grease 44 hardly leaks from the dries filling chambers 29 and 30.
- the present invention may be applied to a gas spring 7 in which the rod member 21 does not penetrate the cylinder body 20 and protrudes from one end of the cylinder body 20.
- the seal member, the ring member and the grease filling chamber are provided only at the end of the rod member 21 on the advance side in the gas filling chamber 23.
- the ring members 27A and 28A may be configured to be able to be reduced in diameter through the dividing portions 51 and 52 at one force point in the circumferential direction.
- the ring members 27A and 28A are made of a metal material
- the ring members 27A and 28A The ring members 27 ⁇ and 28 ⁇ are press-fitted into the annular grooves 35, 38 when they are press-fitted into the annular grooves 35, 38.
- the ring members 27A, 28A After being mounted in the annular grooves 35, 38, the ring members 27A, 28A expand in diameter again, and the outer peripheral portions of the ring members 27A, 28A are in the annular grooves 35, 38, respectively. Fit.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Damping Devices (AREA)
- Gripping On Spindles (AREA)
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02714517A EP1384918A1 (en) | 2001-04-11 | 2002-04-05 | Gas spring |
US10/473,828 US7021609B2 (en) | 2001-04-11 | 2002-04-05 | Gas spring |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001112964A JP2002310213A (ja) | 2001-04-11 | 2001-04-11 | ガススプリング |
JP2001-112964 | 2001-04-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002088570A1 true WO2002088570A1 (fr) | 2002-11-07 |
Family
ID=18964273
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2002/003469 WO2002088570A1 (fr) | 2001-04-11 | 2002-04-05 | Ressort a gaz |
Country Status (4)
Country | Link |
---|---|
US (1) | US7021609B2 (ja) |
EP (1) | EP1384918A1 (ja) |
JP (1) | JP2002310213A (ja) |
WO (1) | WO2002088570A1 (ja) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002310213A (ja) * | 2001-04-11 | 2002-10-23 | Pascal Corp | ガススプリング |
JP2010149227A (ja) * | 2008-12-25 | 2010-07-08 | Pascal Engineering Corp | 工作機械用主軸の工具固定装置 |
DE102009037617B3 (de) * | 2009-08-14 | 2011-03-24 | Ott-Jakob Spanntechnik Gmbh | Gasdruckfeder und Spannvorrichtung mit einer derartigen Gasdruckfeder |
DE102010032415A1 (de) * | 2010-07-27 | 2012-02-02 | Hydac Technology Gmbh | Vorrichtung zur Rückgewinnung von Energie |
KR101808216B1 (ko) * | 2015-04-27 | 2017-12-12 | 아퓨안 가부시키가이샤 | 단발식의 에어 해머 공구, 및 상기 단발식의 에어 해머 공구의 타격력 조정 방법 |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5036992U (ja) * | 1973-08-08 | 1975-04-17 | ||
JPS5357146U (ja) * | 1976-10-19 | 1978-05-16 | ||
JPS6435229U (ja) * | 1987-08-26 | 1989-03-03 | ||
JPH0187367U (ja) * | 1987-12-01 | 1989-06-09 | ||
JP2000005907A (ja) * | 1998-06-23 | 2000-01-11 | Pascal Kk | 工作機械主軸の工具固定装置 |
JP2001087910A (ja) * | 1999-09-14 | 2001-04-03 | Pascal Kk | 工作機械主軸の工具固定装置 |
JP2001246507A (ja) * | 2000-03-23 | 2001-09-11 | Pascal Kk | 工作機械主軸の工具固定装置 |
JP2001280390A (ja) * | 2000-03-31 | 2001-10-10 | Pascal Kk | ガススプリング及びそのガス充填方法 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6435229A (en) * | 1987-07-30 | 1989-02-06 | Shisaka Kenkyusho Kk | Carbon thermometer |
DE8806642U1 (ja) * | 1988-05-20 | 1988-09-08 | Stabilus Gmbh, 5400 Koblenz, De | |
JP4663901B2 (ja) * | 2001-04-11 | 2011-04-06 | パスカルエンジニアリング株式会社 | ガススプリング及びそのガス充填方法 |
JP2002310213A (ja) * | 2001-04-11 | 2002-10-23 | Pascal Corp | ガススプリング |
-
2001
- 2001-04-11 JP JP2001112964A patent/JP2002310213A/ja active Pending
-
2002
- 2002-04-05 WO PCT/JP2002/003469 patent/WO2002088570A1/ja not_active Application Discontinuation
- 2002-04-05 US US10/473,828 patent/US7021609B2/en not_active Expired - Fee Related
- 2002-04-05 EP EP02714517A patent/EP1384918A1/en not_active Withdrawn
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5036992U (ja) * | 1973-08-08 | 1975-04-17 | ||
JPS5357146U (ja) * | 1976-10-19 | 1978-05-16 | ||
JPS6435229U (ja) * | 1987-08-26 | 1989-03-03 | ||
JPH0187367U (ja) * | 1987-12-01 | 1989-06-09 | ||
JP2000005907A (ja) * | 1998-06-23 | 2000-01-11 | Pascal Kk | 工作機械主軸の工具固定装置 |
JP2001087910A (ja) * | 1999-09-14 | 2001-04-03 | Pascal Kk | 工作機械主軸の工具固定装置 |
JP2001246507A (ja) * | 2000-03-23 | 2001-09-11 | Pascal Kk | 工作機械主軸の工具固定装置 |
JP2001280390A (ja) * | 2000-03-31 | 2001-10-10 | Pascal Kk | ガススプリング及びそのガス充填方法 |
Also Published As
Publication number | Publication date |
---|---|
US20040155390A1 (en) | 2004-08-12 |
US7021609B2 (en) | 2006-04-04 |
JP2002310213A (ja) | 2002-10-23 |
EP1384918A1 (en) | 2004-01-28 |
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