WO2004067971A1 - 流体圧シリンダ - Google Patents
流体圧シリンダ Download PDFInfo
- Publication number
- WO2004067971A1 WO2004067971A1 PCT/JP2004/000863 JP2004000863W WO2004067971A1 WO 2004067971 A1 WO2004067971 A1 WO 2004067971A1 JP 2004000863 W JP2004000863 W JP 2004000863W WO 2004067971 A1 WO2004067971 A1 WO 2004067971A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- rod
- lock
- piston
- cylinder
- mouth
- Prior art date
Links
Classifications
-
- 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
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/26—Locking mechanisms
- F15B15/261—Locking mechanisms using positive interengagement, e.g. balls and grooves, for locking in the end positions
Definitions
- the present invention relates to a fluid pressure cylinder that reciprocates a rod in the axial direction by the pressure of a fluid such as compressed air, and in particular, a fluid that applies an axial thrust to a piston port when supply of fluid pressure is cut off.
- a fluid such as compressed air
- an automobile body is formed by assembling a plurality of panel members constituting the body by joining means such as spot welding.
- each work stage is moved to a body assembly line having work stages arranged at predetermined intervals while the panel material is fastened to the carrier by a clamp member.
- a body assembly line having work stages arranged at predetermined intervals while the panel material is fastened to the carrier by a clamp member.
- some pneumatic cylinders have a brake mechanism so that the piston rod can be braked even when the supply of air pressure is stopped.
- the brake mechanism an engagement groove is formed on the side surface of the piston, and the piston rod moves in the forward direction or When it moves to a predetermined position in the retreating direction, the urging force of the spring member in a direction orthogonal to the moving direction inserts the hook member from the side of the cylinder into the engagement groove, thereby making the piston mouth catch.
- an inclined surface such as a tapered surface is formed at the tip of the lock member to apply a thrust to the piston rod, and the lock member is attached to the piston rod by applying a spring force to the lip member.
- Some are designed to apply thrust through the shaft.
- it is important to reduce the size of a spring member for applying a predetermined thrust to the piston hole.
- the fluid pressure cylinder can be downsized. Disclosure of the invention
- An object of the present invention is to ensure that thrust can be reliably applied to a piston rod even when a small force is applied to a lock rod that applies axial thrust to the piston rod when supply of fluid pressure is cut off. It is to be.
- the fluid pressure cylinder includes a cylinder body having a piston chamber in which a piston is reciprocally movable, and a cylinder chamber partitioned into a forward fluid chamber and a backward fluid chamber by the piston, and attached to the piston, A piston rod protruding from the end of the cylinder body to the outside, an engaging member provided on the piston port and having a hook surface inclined with respect to a radial direction of the piston port, A lock piston, which is reciprocally movable in a direction substantially perpendicular to the piston rod, in a hook cylinder provided in the cylinder body, and a guide hole formed in the lock piston, which is formed in the hook cylinder.
- the large-diameter portion that fits and the large-diameter portion is provided through a narrow-diameter constriction portion, and the mouthpiece is closest to the biston rod.
- a mouth Kkuroddo having a sliding contact portion which contacts the radially inner portion of the lock surface when the.
- the sliding contact portion when the mouthpiece rod comes closest to the biston rod, the sliding contact portion is located inside a radially central portion of the mouthpiece surface. It is characterized by contact. Further, in the fluid pressure cylinder according to the present invention, an angle of the lock surface with respect to the biston opening is set to 45 degrees or less.
- the hydraulic cylinder according to the present invention further includes a spring member that applies a spring force to the mouth rod in a direction toward the biston rod, the unlocking fluid that applies a thrust in a direction away from the biston rod. A chamber is formed in the mouth cylinder.
- the fluid pressure cylinder of the present invention is inclined at an angle larger than the mouth surface in a direction opposite to the mouth surface, and retreats the mouth rod against the spring force when the biston rod moves.
- a riding guide surface to be moved is formed on the engaging member. Further, in the fluid pressure cylinder according to the present invention, an angle of the riding guide surface with respect to the biston rod is set to 45 degrees or more.
- the lock rod that contacts the engagement member provided on the piston opening is provided with the sliding contact portion that contacts the radially inner portion of the lock surface of the engagement member.
- the point of force transmitting the maximum thrust between the piston and the engaging member can be set radially inside the engaging member, and the axial thrust of the lock rod is increased to the piston rod to increase the axial direction of the piston rod. Thrust can be transmitted.
- the outer diameter of the lock piston provided on the lock rod can be reduced, and the fluid pressure cylinder can be downsized.
- the lock rod has a large-diameter portion, and the large-diameter portion is slidably fitted in a guide hole formed in the lock cylinder, so that even if a bending force is applied to the lock rod, the lock rod is smoothly moved. Can be moved in the axial direction.
- the lock rod By applying spring force to the lock rod, thrust can be reliably applied to the piston rod even if the fluid pressure supply circuit fails. Further, since the engaging member has the riding guide surface, the lock rod can be moved backward by moving the piston rod, so that the lock rod can reliably contact the lock surface.
- FIG. 1 is a plan view showing a part of an assembly line of an automobile body in which panel materials constituting the automobile body are transported by the transport vehicle, and FIG. 2 is installed on the transport vehicle shown in FIG.
- FIG. 3 is an enlarged front view showing the clamped device
- FIG. 3 is an enlarged sectional view showing a fluid pressure cylinder according to an embodiment of the present invention applied to the clamp device shown in FIG. 2
- FIG. 3 is an enlarged cross-sectional view showing a part of FIG. 3
- FIGS. 5 (A) to 5 (D) are cross-sectional views showing an operation state of a lock piston accompanying movement of a piston port
- FIG. 6 is a fluid pressure of the present invention.
- FIG. 7 is a schematic diagram showing the state of transmission of the clamping force in the cylinder
- Fig. 7 is a schematic diagram showing the state of transmission of the clamping force in the hydraulic cylinder as a comparative example
- Fig. 8 is a state in which the lock rod and the lock surface are in contact.
- FIG. 9 is a characteristic diagram showing a difference in external force due to a difference in a contact point position when an external force in an axial direction is applied to a piston rod to return a lock rod.
- the panel material is transported by a transport vehicle.
- the transport vehicle 10 has a plurality of wheels 11 and extends from the first stage S1 to the final stage S1. Travel to n.
- the panel material constituting the vehicle body is loaded into the transport trolley 10 as a peak W, and the workpiece W is processed at each stage during traveling, such as the stage S2, and in the final stage Sn,
- the park W for which the predetermined assembling work has been completed is removed from the carrier 10.
- Each carrier 10 is provided with a clamp device 12 for clamping or fastening the work W.
- two clamp devices 12 are provided for each transport vehicle 10, but an arbitrary number of clamp devices 12 are provided on the transport vehicle 10 according to the size of the work W and the like. Can be provided.
- FIG. 2 is an enlarged front view showing the clamping device 12.
- the carrier 10 is provided with a work support 13 for supporting the work W.
- the support 13 is provided with a support 13.
- a clamp arm 14 for clamping the work W is swingably mounted about a pin 15a.
- a hydraulic cylinder 16 is fixed to the support base 13 by a pin 15b at the clevis 17 fixed to the cylinder 13 so as to be able to swing freely.
- the piston cylinder 16 of the hydraulic cylinder 16 Is connected to the clamp arm 14 by a pin 15c.
- the clamp arm 14 moves forward with the piston 18 and the hydraulic pressure When the workpiece W moves in a direction protruding from the inside of the cylinder 16 and moves to a predetermined stroke end position, the workpiece W is clamped.
- FIG. 3 is an enlarged sectional view of the fluid pressure cylinder 16 shown in FIG. 2, and FIG. 4 is an enlarged sectional view of a part of FIG.
- the fluid pressure cylinder 16 has a cylinder body 20 having a cylinder tube 20, an end force par 21 attached to one end of the cylinder tube 20, and a mouth cap 22 attached to the other end thereof.
- the supply port 21 and the rod cover 22 are provided with supply / discharge ports 19a and 19b, respectively.
- the mouth cover 22 is attached to the other end of the cylinder tube 20 via a mouthpiece cylinder 24.
- the mouthpiece cylinder 24 constitutes a cylinder body 23, and a cylinder chamber 25 is formed inside the cylinder body 23.
- a piston piston 26 is mounted in the cylinder chamber 25 so as to be able to reciprocate in the axial direction, and a piston opening 18 is mounted in the piston 26 so that it can be reciprocated in the cylinder body 23 in the axial direction.
- the inside of the cylinder chamber 25 is partitioned into a forward fluid chamber 25a and a backward fluid chamber 25b by the piston 26, and compressed air is supplied from the supply / discharge port 19a to the forward fluid chamber 25a.
- the piston rod 18 moves forward in the projecting direction, and when compressed air is supplied to the retraction fluid chamber 25 b from the supply / discharge port 19 b, the piston rod 18 enters the cylinder tube 20. It will move backward.
- the piston 26 has a first disk 27 having an outer periphery provided with a sealing material 27a, and a second disk 28 having a screw portion 28a, and is formed on a screw portion 28a.
- the piston 26 is attached to the piston rod 18 by screwing a male screw 29 formed at the end of the piston rod 18 into the female screw.
- An engagement member 31 and a sleeve 32 are attached between the piston 26 and the step portion 30 of the piston rod 18, and the engagement between the engagement member 31 and the piston opening
- a lock cylinder 33 is formed integrally with the lock cylinder 24 so as to apply thrust to 18, and the lock cylinder 33 is perpendicular to the cylinder body 23.
- the engaging member 31 is fitted to the piston rod 18 in the illustrated case, the engaging member 31 may be provided integrally with the piston rod 18.
- the lock cylinder 33 reciprocates in the direction perpendicular to the piston opening 18 in the lock cylinder 33.
- a mouthpiece is freely attached to the mouthpiece, and a mouthpiece is provided with a lock rod 35 integrally therewith.
- the lock rod 35 has a large-diameter portion 35a slidably fitted in a guide hole 36 formed in the lock cylinder 33, and a narrower portion 35b with a smaller diameter than the above.
- the distal end of 35b is provided with a tapered sliding contact portion 37 whose diameter decreases toward the distal end surface.
- a spring receiving hole 38 is formed at the center of the lock piston 34 and the lip rod 35 integrated with the lock piston 34.
- the spring receiving hole 38 has a lock rod 35 in the direction toward the piston rod 18.
- a compression coil spring 39 is incorporated as a spring member for applying a spring force.
- the interior of the lock cylinder 33 is divided into a spring housing chamber 41 a and a lock release fluid chamber 41 b by a lock piston 34, and the lock release fluid chamber 41 b is formed of a lock cylinder 3. 3 communicates with the supply / discharge port 19 b via the communication hole 4 2 formed in 3 and the fluid supplied to the fluid chamber 4 1 b for releasing the lip against the lip rod 35 against the spring force. Thrust is applied in the direction away from the piston 18.
- the engagement member 3 1 has a lock surface 4 3 with which the sliding contact portion 3 7 at the tip of the lock rod 35 comes into contact when the piston rod 18 approaches the stroke limit end of the forward movement.
- the piston rod 18 is inclined at an angle with respect to the radial surface S of the piston rod 18 toward the tip of the piston opening 18.
- This inclination angle a is about 30 degrees in the case shown, and corresponds to the inclination angle of the sliding contact portion 37 of the lock rod 35. Since both the sliding contact portion 37 and the locking surface 43 are conical surfaces, when the sliding contact portion 37 contacts the locking surface 43, they come into linear contact with each other, but the locking rod 35 And the engaging member 31 are elastically deformed, so that they come into line contact with a predetermined width.
- the inclination angle ⁇ is not limited to 30 degrees as long as the angle is 45 degrees or less that increases the spring force.
- the leading end side of the engaging member 31 is formed with a riding guide surface 44 having an inclination angle ⁇ with respect to the radial surface S toward the rear end of the biston rod 18. Is 60 degrees which is 45 degrees or more in the case shown. Therefore, the fluid supplied to the forward fluid chamber 25a causes the piston 18 to protrude from the retreat limit position to the forward limit position, and the tip of the lock rod 35 moves to the riding guide surface 44. When it comes into contact, the spring force of the spring member 39 is not converted as a large thrust in the direction of returning the piston rod 18, so the lock rod 35 is piled into the spring force and compressed by the compressed air. Move backwards away from 8.
- the position where the maximum axial force is applied can be set radially inside the lock surface 43.
- the width D is set to about 1/2 or less of the radial dimension R.
- the position where the maximum axial force is applied can be set inside the lip surface, so that the spring force of the spring member 39 is increased to change the lock rod 35 to the piston rod 18.
- the transmission can be performed, the small spring member 39 can be used, and the lock cylinder 33 can be downsized.
- the spring member 39 applies a thrust from the lock rod 35 to the piston rod 18 without using the spring member 39.
- the lock cylinder 33 may be a double-acting cylinder to apply thrust to the piston rod 18 with compressed air.
- FIG. 5 is a schematic diagram showing the operating state of the lock pad 35 when compressed air is supplied to the forward fluid chamber 25a to move the piston rod 18 toward the stroke end of the forward limit.
- FIG. 5 (A) shows a state in which the piston rod 18 has been protruded and moved just before the tip of the lock rod 35 comes into contact with the riding guide surface 44.
- the sliding contact portion 37 comes into contact with the riding guide surface 44 as shown in FIG.
- the lock rod 35 moves backward against the force.
- the biston rod 18 continues to move forward, the sliding contact portion 37 comes into contact with the lock surface 43 as shown in FIG. 5 (C).
- a thrust in the projecting direction is applied to the piston rod 18 by the spring force.
- FIG. 5 (D) shows a state at the time when the piston rod 18 further moves forward and the clamp arm 14 connected to the piston rod 18 reaches the clamp completion position. Under this condition, even if compressed air is discharged from the forward fluid pressure chamber 25a to the outside, Since the lock rod 35 is engaged with the engagement member 31, the spring force of the spring member 39 applies an elastic force in the forward direction to the piston rod 18, and the clamp arm 14 holds the workpiece W. Clamping can be continued with a predetermined thrust. When the work W is clamped, there is a gap between the distal end surface of the lock rod 35 and the sleeve 32 as shown in FIG. 5D, so that errors in the thickness of the work W can be absorbed.
- a supply / discharge hose 51 connected to a supply / discharge port 19 a is provided on a supply / discharge joint 51 provided on the carrier 10 as shown in FIG. 52 a and the supply / discharge hose 52 b connected to the supply / discharge port 19 b are connected, and the compressed air from the outside to the forward fluid chamber 25 a and the reverse fluid chamber 25 b is connected.
- Supply and discharge from the inside take place via a supply / discharge joint 51.
- the first stage S 1 shown in FIG. 1 is provided with a supply / discharge joint 53 adjacent to the carrier 10, and a supply / discharge hose connected to the supply / discharge joint 53 is provided with an air pressure (not shown).
- the source is connected via a flow path switching valve.
- These supply / discharge joints 51 and 53 are connected to each other when the transport vehicle 10 comes to the position of the first stage S 1, and are respectively connected from pneumatic sources provided outside the transport vehicle 10.
- the supply of compressed air to the fluid chambers 25a and 25b and the discharge to the outside can be switched.
- the work W is fastened by closing the clamp arm 14 with the fluid pressure cylinder 16. Can be.
- the carrier 10 By moving the carrier 10 in the state where the work W is fastened in this manner, the carrier 10 can be subjected to a predetermined assembling operation at each stage constituting the vehicle body assembly line.
- the final stage Sn shown in FIG. A joint 53 is provided, and by opening the clamp arm 14 at this stage Sn, the work W after the predetermined assembly is completed can be carried out of the line.
- FIG. 6 is a schematic diagram showing the state of transmission of the clamping force in the fluid pressure cylinder of the present invention.
- FIG. 7 is a schematic diagram showing, as a comparative example, a state of transmission of a clamping force in a fluid pressure cylinder having a lock rod without a constricted portion.
- a sliding contact portion 37 is formed at the tip of the lock rod 35 via a constricted portion 35b so that the sliding contact portion 37 contacts a part of the lock surface 43.
- Fig. 8 is different from the operating condition of the fluid pressure cylinder, and as shown by the symbol P in Figs. 6 and 7, the external force F is gradually applied to the application point P of the piston rod 18 while the lock rod 3 is being applied.
- 5 is a characteristic curve showing a result of measuring a movement stroke in a direction away from a biston rod 18 of FIG.
- the solid line is a characteristic line of the present invention in which a constricted portion 35b is formed in the lock rod 35 as shown in FIG. 6 and the power point T is set
- the broken line is a lock rod 3 as shown in FIG. 5 is a characteristic line of a comparative example in which a point of force U is formed without forming a constricted portion.
- FIG. 8 is different from the operating condition of the fluid pressure cylinder, and as shown by the symbol P in Figs. 6 and 7, the external force F is gradually applied to the application point P of the piston rod 18 while the lock rod 3 is being applied.
- 5 is a characteristic curve showing a result
- the angle between the line connecting the point of force T and the point of action P and the center line of the piston opening 18 is set to 01, and the line connecting the point of force U and the point of action P is connected to the center line.
- 0 1 is smaller than 0 2, forming a constricted portion 3 5 b as shown in FIG.
- the lip rod 35 moves back unless a large external force is applied to the point of action P, as shown in Fig. 7. Turned out not to be. This means that even if the same spring force is applied to the lock rod 35, a large thrust can be applied to the piston rod 18 by setting the force point T radially inside the lock surface 43. It means you can do it.
- this fluid pressure cylinder 16 moves the piston rod 18 forward, that is, presses it, and clamps the work with the clamp arm 14. However, the piston rod 18 moves backward, that is, pulls. Then, the workpiece may be clamped by the clamp arm 14. In that case, a tensile stress is generated in the piston rod 18 in the clamped state.
- the fluid pressure cylinder 16 can be applied to a fluid pressure cylinder for driving a clamp arm incorporated in a slit formed in a locate pin.
- the fluid pressure cylinder 16 is used to drive a clamp device 12 provided in the carrier 10, and is attached to the tip of the robot arm to clamp and transport the panel material. The case can also be applied.
- This fluid pressure cylinder is not limited to clamping the panel material, but can be used in any application where the piston rod is stopped at a predetermined position to generate thrust on the piston rod. Cylinder 16 can be applied.
- the fluid pressure cylinder 16 moves the piston 18 by compressed air, the piston 18 may reciprocate by liquid pressure such as hydraulic pressure.
- This fluid pressure cylinder is provided on the transport trolley and is used to clamp the panel material when assembling the vehicle body while transporting the panel material constituting the vehicle body by the transport trolley.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/543,536 US7299739B2 (en) | 2003-01-29 | 2004-01-29 | Hydraulic cylinder |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003020201A JP4185374B2 (ja) | 2003-01-29 | 2003-01-29 | 流体圧シリンダ |
JP2003-020201 | 2003-01-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004067971A1 true WO2004067971A1 (ja) | 2004-08-12 |
Family
ID=32820624
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/000863 WO2004067971A1 (ja) | 2003-01-29 | 2004-01-29 | 流体圧シリンダ |
Country Status (4)
Country | Link |
---|---|
US (1) | US7299739B2 (ja) |
JP (1) | JP4185374B2 (ja) |
TW (1) | TWI306135B (ja) |
WO (1) | WO2004067971A1 (ja) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090266228A1 (en) * | 2006-07-28 | 2009-10-29 | Norgren Gmbh | Locking piston assembly |
CN105197821A (zh) * | 2015-09-07 | 2015-12-30 | 徐州重型机械有限公司 | 能防芯管吸空的伸缩系统及起重机 |
CN107191428A (zh) * | 2017-05-25 | 2017-09-22 | 奉化市鑫潮自动化元件有限公司 | 一种内外活塞自锁气缸 |
CN109058229A (zh) * | 2018-10-16 | 2018-12-21 | 山东百帝气动科技股份有限公司 | 一种具有双自锁结构的气缸 |
CN117847046A (zh) * | 2024-02-21 | 2024-04-09 | 江苏亚力亚气动液压成套设备有限公司 | 带锁紧结构的举升式油缸 |
Families Citing this family (17)
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JP4788181B2 (ja) * | 2005-04-13 | 2011-10-05 | パナソニック株式会社 | 表示パネルの組立装置 |
NO329856B1 (no) * | 2007-07-03 | 2011-01-17 | Nat Oilwell Norway As | Las for aksial lasing av en hydraulikksylinders stempelstangkopling til hydraulikksylinderens sylinderhus |
US9091285B2 (en) * | 2009-11-23 | 2015-07-28 | Numatics, Incorporated | Piston and cylinder assembly with an indicator pin device |
CN102011764A (zh) * | 2010-06-05 | 2011-04-13 | 常州液压成套设备厂有限公司 | 液压油缸锁定装置 |
CH703535B1 (de) * | 2010-07-22 | 2012-09-14 | Liebherr Machines Bulle Sa | Einstellmittel für einen Stellzylinder, Stellzylinder und Hydraulikmaschine. |
CN102865269B (zh) * | 2011-07-04 | 2015-03-25 | 鸿富锦精密工业(深圳)有限公司 | 气缸 |
CN102400973B (zh) * | 2011-11-18 | 2015-07-08 | 北京市三一重机有限公司 | 一种液压油缸 |
US9162760B2 (en) | 2012-08-02 | 2015-10-20 | Bell Helicopter Textron Inc. | Radial fluid device with multi-harmonic output |
US8857757B2 (en) * | 2012-08-02 | 2014-10-14 | Bell Helicopter Textron Inc. | Independent blade control system with hydraulic pitch link |
US8973864B2 (en) | 2012-08-02 | 2015-03-10 | Bell Helicopter Textron Inc. | Independent blade control system with hydraulic cyclic control |
US9061760B2 (en) | 2012-08-02 | 2015-06-23 | Bell Helicopter Textron Inc. | Independent blade control system with rotary blade actuator |
US9376205B2 (en) | 2012-08-02 | 2016-06-28 | Bell Helicopter Textron Inc. | Radial fluid device with variable phase and amplitude |
US9021936B2 (en) * | 2012-09-28 | 2015-05-05 | Eaton Corporation | Ventless actuator lock |
US9291176B2 (en) * | 2013-01-30 | 2016-03-22 | Messier-Dowty Inc. | Locking mechanism for locking an actuator |
CN104314898B (zh) * | 2014-09-28 | 2016-10-05 | 徐州重型机械有限公司 | 起重机及其单缸插销式伸缩机构液控系统 |
JP2023018944A (ja) | 2021-07-28 | 2023-02-09 | Kyb-Ys株式会社 | 流体圧シリンダ |
CN116518648B (zh) * | 2023-05-08 | 2023-11-17 | 环西汀新材料(江苏)有限公司 | 石油气体液化分离处理系统及处理工艺 |
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- 2003-01-29 JP JP2003020201A patent/JP4185374B2/ja not_active Expired - Fee Related
-
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- 2004-01-29 WO PCT/JP2004/000863 patent/WO2004067971A1/ja active Application Filing
- 2004-01-29 US US10/543,536 patent/US7299739B2/en not_active Expired - Fee Related
- 2004-01-29 TW TW093101923A patent/TWI306135B/zh not_active IP Right Cessation
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US3889576A (en) * | 1969-06-13 | 1975-06-17 | Sheffer Corp | Locking cylinder with improved locking structure |
JPS4841191B1 (ja) * | 1970-05-09 | 1973-12-05 | ||
WO1981002044A1 (en) * | 1980-01-04 | 1981-07-23 | Mecman Ab | Locking device for fluid cylinders |
US4524676A (en) * | 1984-01-19 | 1985-06-25 | American Standard Inc. | Hydraulic cylinder locking device |
WO1994020261A1 (de) * | 1993-03-03 | 1994-09-15 | Festo Kg | Werkzeugmaschine |
JP2001032803A (ja) * | 1999-07-23 | 2001-02-06 | Koganei Corp | 流体圧シリンダ |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090266228A1 (en) * | 2006-07-28 | 2009-10-29 | Norgren Gmbh | Locking piston assembly |
US8261655B2 (en) * | 2006-07-28 | 2012-09-11 | Norgren Gmbh | Locking piston assembly |
CN105197821A (zh) * | 2015-09-07 | 2015-12-30 | 徐州重型机械有限公司 | 能防芯管吸空的伸缩系统及起重机 |
CN105197821B (zh) * | 2015-09-07 | 2017-03-01 | 徐州重型机械有限公司 | 能防芯管吸空的伸缩系统及起重机 |
CN107191428A (zh) * | 2017-05-25 | 2017-09-22 | 奉化市鑫潮自动化元件有限公司 | 一种内外活塞自锁气缸 |
CN109058229A (zh) * | 2018-10-16 | 2018-12-21 | 山东百帝气动科技股份有限公司 | 一种具有双自锁结构的气缸 |
CN117847046A (zh) * | 2024-02-21 | 2024-04-09 | 江苏亚力亚气动液压成套设备有限公司 | 带锁紧结构的举升式油缸 |
Also Published As
Publication number | Publication date |
---|---|
JP4185374B2 (ja) | 2008-11-26 |
US20060140781A1 (en) | 2006-06-29 |
TW200422150A (en) | 2004-11-01 |
TWI306135B (en) | 2009-02-11 |
JP2004263713A (ja) | 2004-09-24 |
US7299739B2 (en) | 2007-11-27 |
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