WO2002090781A1 - Dispositif avec cylindre amortisseur - Google Patents
Dispositif avec cylindre amortisseur Download PDFInfo
- Publication number
- WO2002090781A1 WO2002090781A1 PCT/JP2002/003364 JP0203364W WO02090781A1 WO 2002090781 A1 WO2002090781 A1 WO 2002090781A1 JP 0203364 W JP0203364 W JP 0203364W WO 02090781 A1 WO02090781 A1 WO 02090781A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cushion
- piston
- drive
- cylinder
- working fluid
- 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
- F15B15/22—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke
-
- 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
- F15B15/22—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke
- F15B15/228—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke having shock absorbers mounted outside the actuator housing
Definitions
- the present invention relates to a cushion cylinder device.
- a cylinder device that is operated by hydraulic pressure or other fluid pressure is used to move an object to be moved such as a tool, a workpiece, or a cargo.
- the movement is required to be fast in order to improve work efficiency, and at the same time, to move the object to be moved and the surrounding objects safely and prevent damage. Since the amount of soft movement is small, and the higher the amount of high-speed movement, the greater the work efficiency is, the amount of soft movement is controlled in units of 0.1 mm, and it is desirable to minimize the amount of movement. .
- cylinder devices with a cushioning effect which move at high speed while moving, decelerate slowly when approaching the target position, and stop slowly, are often used.
- Conventional cylinder devices having a cushioning action include a cushion cylinder device having a cushion mechanism inside a cylinder and a cylinder device provided by switching a solenoid valve provided in a fluid pressure circuit for supplying and discharging the cylinder. ing.
- Fig. 5 shows an example of a conventional cushion cylinder.
- 501 is a piston
- 502 is a cylinder tube
- 503 is a working chamber containing a working fluid
- 504 is a supply / discharge port through which the working fluid enters and exits.
- a fluid is supplied from the supply / discharge port 504 to the working chamber 503.
- Fluid is supplied to the lower (retreating) working chamber 505 of the piston 501 from a supply / discharge port (not shown) provided below the tube 502.
- a supply / discharge port not shown
- a cylindrical cushion rod 506 protrudes from the forward side of the piston 501, and when the piston 501 slides forward in the cylinder tube 502 and reaches near the end, The cushion pad 506 enters the part of the cushion inlet 508 provided in the end cap 507 that closes the end of the cylinder tube 502.
- the gap between the inside diameter of the cushion-in opening part 508 and the outside diameter of the cushion rod 506 is a gap, and when the cushion rod 506 is inserted into the cushion-in part 508, it becomes narrow.
- the working fluid flows through the gap, and the flow of the working fluid from the working chamber 503 to the supply / discharge port 504 is blocked, and the piston 501 decelerates to generate a cushioning action.
- the cushion operation stroke cs for performing the deceleration operation is fixed, and the cushion operation start position with respect to the target stop position t of the piston 501 cannot be adjusted.
- the cylinder must be set in accordance with the long cushion deceleration time (a in Fig. 3). If the operation is started in the setting state of a and it becomes as shown in b of Fig. 3 over time, the cushion speed is switched to the cushion speed cv earlier than a in Fig. 3 and the cushion speed c moves the cushion stroke cs. The ratio of V increases and the cushion operation time increases.
- FIG. 6 shows an example of a conventional cylinder device by switching a solenoid valve.
- the supply / discharge ports 602 and 603 of the cylinder tube 601 are connected to a first control fluid circuit 604 and a second control fluid circuit 605, respectively.
- the fluid circuits 604 and 605 are further activated It is connected to a fluid supply 606.
- the first control fluid circuit 604 is provided with a first moving direction switching solenoid valve 607 and a first moving speed adjusting section 608, and the second control fluid circuit 605 is connected to the second control fluid circuit 605.
- the first solenoid valve 607 for switching the movement direction and the second solenoid valve 609 for switching the movement direction are switched.
- a large amount of working fluid per unit time is supplied to one of the supply / discharge ports 62, 603 via both the first control fluid circuit 604 and the second control fluid circuit 605.
- the circuit is connected so that the working fluid is discharged from the other.
- the high-speed moving speed is controlled by the first moving-speed adjusting unit 608 restricting the flow of the working fluid.
- the biston When the biston reaches the preset cushion operation start position, it switches to low-speed movement. That is, the first moving direction switching solenoid valve 607 is closed, and the circuit is connected so as to supply and discharge the working fluid only via the second control fluid circuit 605. The low-speed moving speed is controlled by the second moving-speed adjusting unit 608 restricting the flow of the working fluid.
- the present invention provides a driving cylinder tube for holding a driving piston in a sliding position, a cushion cylinder tube for slidably holding a cushion button, A first engaging member provided on a driving screw rod for the driving screw, a second engaging member provided on a cushion piston opening of the cushion button, and a cushion piston
- working fluid restricting means for restricting the flow of the working fluid of the cushion cylinder to reduce the moving speed of the cushion biston to perform the cushion operation, and the driving biston moves forward. Then, when the first engaging member comes into contact with the second engaging member, the cushion piston is restricted by the cushioning operation, and the speed of the driving piston is reduced. That.
- one of the cushion piston portion and the driving biston portion has a sleeve shape, and the other biston rod is slidable on the sleeve-shaped biston portion.
- the drive cylinder tube and the cushion cylinder tube are concentric, or the amount of throttle of the working fluid throttle means is adjustable.
- a cushion stroke adjusting means for adjusting a stroke of the cushion piston may be provided. Further, the first or second engaging member may include the cushion stroke adjusting means. Make it double.
- the drive piston Driving stroke adjusting means for adjusting the stroke is provided, and the first engaging member also serves as the driving stroke adjusting means.
- the working fluid of the cushion cylinder is provided only to the working chamber on the forward side of the cushion biston, and the working chamber on the retreating side is communicated with the atmosphere.
- FIG. 1 is a front view showing an embodiment of the present invention.
- FIG. 2 is a circuit diagram showing the working fluid circuit of FIG.
- FIG. 3 is an explanatory view for explaining a cushion operation of the operating biston according to the present invention.
- FIG. 4 is a longitudinal sectional view showing another embodiment of the present invention.
- FIG. 5 is a longitudinal sectional view showing a conventional cushion cylinder.
- Figure 6 shows a conventional cylinder speed switching circuit using a solenoid valve.
- FIG. 1 is a longitudinal sectional view showing a first embodiment of the present invention
- FIG. 2 is a circuit diagram showing a working fluid circuit of FIG.
- 1 is a main cylinder of a cylinder device, that is, a driving cylinder for moving an object to be moved, and 2 is a cushion cylinder for causing the driving cylinder 1 to perform a cushioning operation.
- the drive cylinder 1 includes a drive piston 3, a drive cylinder tube 4 that slidably holds the drive screw 3, and a drive screw of the drive screw 3.
- Ton rod 5 and supply / discharge for forward drive Consists of port 6 and retraction drive supply / discharge port 7, drive screw in drive cylinder tube 4 forward drive drive chamber 8 forward and retreat drive drive chamber 9 rear Have been.
- a first engagement member 10 is attached to an end of the driving screw rod 5.
- the cushion cylinder 2 includes a cushion piston 11, a cushion cylinder tube 12 that slidably holds the cushion piston 11, and a cushion piston 11 of the above cushion piston 11. Ton port 13, forward / reverse cushion supply / discharge port 14, and retraction-side cushion supply / discharge port 15, and cushion cushion 1 1 in cushion cylinder tube 1 2 A forward-side cushion operation chamber 16 is formed, and a rear-side cushion operation chamber 17 is formed rearward.
- a second engaging member 18 is provided.
- the driving cylinder 1 and the cushion cylinder 2 are fixed to the holding frame 19 in parallel with each other. Each end of the driving piston rod 5 and the cushion piston rod 13 protrudes from the holding frame 19 toward the retreating side, and the first engaging member 1 protrudes from the protruding end. 0, the second engaging tool 18 is attached.
- the first engagement member 10 includes a drive stroke adjusting screw 21 whose tip can abut against a stopper 20 fixed to a holding frame 19, and the second engagement member 1 A cushion stroke adjusting screw 22 that can be contacted with the tip is screwed into 8.
- Reference numeral 23 in FIG. 2 denotes a solenoid valve for switching the forward / backward / stop of the cylinder device.
- this solenoid valve 23 is connected to the retreat-side drive supply / discharge port 7 of the drive cylinder 1.
- A— B— C The pipeline is designed to send the working fluid supplied from the working fluid supply source 24 and return the working fluid discharged from the forward drive supply / discharge port 6 to the working fluid supply source 24.
- D—E—F and when retracting, the working fluid supply source is connected to the forward drive supply / discharge port 6 of the drive cylinder 1 and the forward cushion supply / discharge port 14 of the cushion cylinder 2.
- the retraction-side cushion supply / discharge port 15 of the cushion cylinder 2 is not connected to the above-mentioned pipeline, and is open to the atmosphere. As a result, the retreating working chamber 17 is open to the atmosphere.
- Numeral 25 is a working fluid restricting means provided between the solenoid valve 23 and the pipe line G between the forward side cushion supply / discharge port 14 of the cushion cylinder 2 and the working fluid restricting means 2.
- Numeral 5 restricts the flow of the working fluid in the cushion cylinder 2 when the cushion piston 11 advances.
- the working fluid throttle means 25 is provided with a throttle valve 26 whose throttle amount can be adjusted, and a check valve 27 connected in parallel with the throttle valve 26.
- the check valve 27 closes, the working fluid is throttled by the throttle valve 26, and the working fluid is The flow velocity of the working fluid is reduced according to the throttle amount.
- Reference numeral 28 denotes a throttle valve provided between the pipelines 8 and C
- reference numeral 29 denotes a check valve connected in parallel with the throttle valve 28.
- the cushion operation of the cylinder device according to this embodiment will be described below with reference to FIGS.
- the solenoid valve 23 is switched to advance the cylinder device, and the working fluid is sent to the retreat drive working chamber 9 via the pipe A—B—C—retreat drive supply / discharge port 7.
- the check valve 29 opens, the working fluid in the pipeline is not restricted, the driving piston 3 moves forward at a high speed hv, and the working fluid in the forward drive working chamber 8 is transferred to the port 6 — line D—.
- the cushioning stroke adjusting screw 2 2 of the first engaging member 10 that moves integrally with the driving piston 3 is used for the cushion.
- the second engagement member 18 on the cylinder 2 side comes into contact with the second engagement member 18 (k in FIG. 3), and thereafter, the driving piston 3 moves forward integrally with the cushion piston 11.
- the cushion piston 11 When the cushion piston 11 starts to move forward, the working fluid in the working chamber 16 moves out of the working chamber 16 and pushes out the working cushion supply / discharge port 14 side.
- the extruded working fluid closes the check valve 27 with that flow, is strongly throttled by the throttle valve 26, flows through the pipeline G—E—F at a slow flow rate, and drives the cushion piston 11 1, Reduce the forward movement speed of the screw 3 for use to the cushion operation speed cv, and shift to the cushion operation of the cylinder device.
- the flow rate of the working fluid on the driving cylinder 1 side naturally decreases.
- the driving piston 3 of the driving cylinder 1 is driven at a high speed hV until it is engaged with the cushion piston 11 of the cushion cylinder 2.
- the first engaging member 10 of the driving cylinder 1 moves forward and comes into contact with and engages with the second engaging member 18 of the cylinder 2 for cushion, the cushion operation of the cushion piston 11 is performed. The speed is reduced.
- the cushion stroke c s can be changed by inserting and removing the cushion stroke adjusting screw 22.
- the drive stroke d s can be changed by inserting and removing the drive stroke adjusting screw 21.
- the point k at which the first engagement member 10 comes into contact with the second engagement member 18 does not fluctuate due to the influence of the temperature change of the working fluid, the wear of the parts, and the like.
- the switching point is very stable.
- the working fluid restricting means 25 at the time of switching is different from the conventional cushion rod 506 in that the deceleration is started after the cushion rod 506 has entered the cushion inro part 508 to some extent.
- the deceleration starts immediately after the working fluid flows into the working fluid throttling means 25, the response is fast, and the time required for deceleration is very short (see r in Fig. 3). ).
- the cushion stroke cs can be set to the minimum necessary. Even if the cushion operation start position k is set very close to the stop position t, it is safe. The cushioning effect at the time of stoppage is reliably obtained, and the high-speed (hv) travel time can be extended by the reduction of the cushion stroke cs, leading to a reduction in work cycle time.
- the second engagement member 18 may be a cushion stroke adjusting screw, and the cushion stroke adjusting screw 22 may be a fixed pin that is ineffective to adjust. It is a matter of course that the adjusting means and the drive stroke adjusting means can be provided at a position different from the first and second engaging members.
- FIG. 4 is a longitudinal sectional view showing a second embodiment of the present invention.
- the driving cylinder tube and the cushion cylinder tube are formed concentrically to provide a compact cushion cylinder device.
- 31 is a driving cylinder
- 32 is a cushion cylinder
- the drive cylinder 31 includes a drive piston 33, a drive cylinder tube 34 that slidably holds the drive screw 33, and a front drive piston of the drive piston 33.
- the drive piston 33 in the inside is formed with a forward drive working chamber 38 on the front side and a backward drive working chamber 39 on the rear side.
- the front end of the front drive piston rod 35A projects forward from the drive cylinder tube 34 so that when the biston 33 advances, it strikes the driven member 100 and moves it. I'm sorry.
- the distal end of the rear drive piston rod 35 B has a screw portion 51, and a first engaging member 40 serving also as a drive stroke adjusting means is screwed into the screw portion 51. You.
- the cushion cylinder 32 includes a cushion piston 41, a cushion cylinder tube 42 that slidably holds the cushion piston 41, and a front cushion of the cushion piston 41. It is composed of a screw rod 43 A and a piston rod 43 B for the rear cushion, a supply / discharge port 44 for the forward side cushion, and a supply / discharge port 45 for the reverse side cushion.
- the piston 41 has a forward-side cushioning operation chamber 46 on the front side, and a retraction-side cushioning operation chamber 47 on the rear side.
- the piston 41 for the cushion, the piston rod 43A for the front cushion, and the piston rod 43B for the rear cushion are combined to form a cushion piston part.
- the piston portion for the cushion has a hollow sleeve shape, and the piston rod 35B for driving the rear portion is slidably inserted into the hollow hole, and the piston rod 35B for the rear portion further includes a cushion.
- the first engagement portion 40 is attached to the end portion of the piercing piston portion and penetrates through the piercing portion as described above.
- the end of the rear cushion screw rod 43B has a threaded portion 52, and a second engaging member 48, which also serves as cushion stroke adjusting means, is screwed into the threaded portion 52. are doing.
- the drive cylinder tube 34 and the cushion cylinder tube 42 are fitted in an in-line set (49), fixed with screws, and concentric.
- the O-ring 53 between the drive cylinder tube 34 and the front drive screw rod 35 A seals the forward drive operation chamber 38 with the outside
- the drive cylinder tube 3 A ring 5 4 between 4 and the drive piston 3 3 seals the forward drive working chamber 38 and the backward drive working chamber 39
- the cushion cylinder tube 42 and the front cushion are used.
- An O-ring 55 between the toner port 43 A seals the backward drive working chamber 39 and the forward cushion working chamber 46.
- cushion cylinder tube 4 2 and cushion biston 4 The 0 ring 56 between them seals the forward-side cushion operation chamber 46 and the rear-side cushion operation chamber 47, and the end of the cylinder tube 42 for cushion and the screw lock for rear cushion.
- the driving cylinder 31 of FIG. 4 is used instead of the driving cylinder 1 of FIG. 2, and the cushion cylinder 32 of FIG. 4 is used instead of the cushion cylinder 2 of FIG. Connecting.
- the forward drive supply / discharge port 36 of the drive cylinder 31 is connected to the pipeline D in FIG. 2, and the reverse drive supply / discharge port 37 is connected to the pipeline C in FIG. .
- the supply / discharge port 44 for the cushion on the forward side of the cushion cylinder 32 is connected to the pipeline G in Fig. 2, and the supply / discharge port 45 for the retraction cushion is open to the atmosphere.
- the solenoid valve 23 is switched and the working fluid is sent to the retreat-side drive working chamber 39 in order to advance the cylinder device.
- the drive piston 33 moves forward at a high speed hv, and the working fluid in the forward drive working chamber 38 is discharged to the working fluid supply source 24.
- the front end face of the first engaging member 40 moving integrally with the driving screw 33 is connected to the cushion cylinder. 3 Abuts the rear end face of the second engaging member 48 on the 2 side (k in FIG. 3), and thereafter, the driving piston 33 moves forward integrally with the cushion piston 41. .
- the forward speed of the cushion biston 41 becomes the low-speed cushion operation speed cV, and the cylinder device rapidly decreases from the high-speed advance hv to the cushion operation speed cV.
- the cushion of the second engagement member 48 can be adjusted to adjust the cushion stroke cs.
- the drive stroke ds can be adjusted by adjusting the screw of the first engagement member 40. That is, at the retracted position of the cushion cylinder, as shown in FIG. 4, the clearance between the front end face of the second engagement member 48 and the end face of the cushion cylinder tube end 42A is cs. to set the front end face of the first engaging member 4 0 and the clearance of the rear end surface of the second engaging Gogu 4 8 1 'ds - to set me cs ".
- the point k at which the first engagement member 40 comes into contact with the second engagement member 48 varies under the influence of a change in temperature of the working fluid, wear of parts, and the like.
- the switching point to the cushion operation is extremely stable.
- the response of the working fluid throttle means 25 at the time of this switching is fast, and the time required for deceleration is very short (see r in FIG. 3).
- the cushion stroke cs can be set to the minimum necessary, and even if the cushion operation start position k is set very close to the stop position t, it is safe.
- the cushioning effect at the time of stoppage is reliably obtained, and the high-speed (hv) travel time can be extended by the reduction of the cushion stroke cs, leading to a reduction in work cycle time.
- the cushion biston portion is formed in a sleeve shape
- the drive rod of the drive part is inserted slidably into the sleeve-shaped cushion part, but in the present invention, the drive part is formed in a sleeve shape. It is also possible to insert the cushion rod of the cushion part into the shape of the driving part.
- a working fluid restricting means is provided to reduce the moving speed of the cushion screw and perform the cushion operation, and the drive piston of the drive cylinder moves forward to make the first engagement member of the drive screw rod a cushion screw.
- Cushion movement due to dimensional errors in the cylinder parts because the cushion piston is restricted by the cushion movement of the cushion piston when it comes into contact with the second engagement member of the ton rod, and the speed of the drive piston is reduced.
- the change in cushion operation due to the passage of time and the temperature change of the working fluid is reduced, The cushion operation start position becomes possible accurately set.
- the cushion stroke can be set to the minimum necessary, the cushion operation start position can be set very close to the stop position, and the high-speed stroke can be reduced by the amount that can reduce the low-speed cushion stroke.
- the troke can be lengthened and the work cycle time can be reduced. If the drive cylinder and the cushion cylinder are formed concentrically, a compact and space-efficient cushion cylinder can be obtained. If the first and second engaging members for engaging the driving piston and the cushion piston also serve as the cushioning means and the driving stroke adjusting means, the number of parts can be reduced. This will reduce costs.
- the fluid pressure circuit can be saved and the cost can be reduced.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
- Fluid-Pressure Circuits (AREA)
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002587815A JP4398154B2 (ja) | 2001-04-25 | 2002-04-03 | クッションシリンダ装置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001-127848 | 2001-04-25 | ||
JP2001127848 | 2001-04-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002090781A1 true WO2002090781A1 (fr) | 2002-11-14 |
Family
ID=18976647
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2002/003364 WO2002090781A1 (fr) | 2001-04-25 | 2002-04-03 | Dispositif avec cylindre amortisseur |
Country Status (6)
Country | Link |
---|---|
US (1) | US20030167914A1 (ja) |
JP (1) | JP4398154B2 (ja) |
KR (1) | KR20030014729A (ja) |
CN (1) | CN1462346A (ja) |
TW (1) | TW593910B (ja) |
WO (1) | WO2002090781A1 (ja) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1396661B1 (it) * | 2009-11-19 | 2012-12-14 | Teco Srl | Circuito fluidodinamico. |
CN103423235B (zh) * | 2012-05-23 | 2015-11-25 | 中联重科股份有限公司 | 液压缸缓冲控制方法、缓冲式液压缸控制系统及液压设备 |
CN103032409B (zh) * | 2012-12-27 | 2015-04-15 | 广州市阿盖特科技有限公司 | 用于挖泥船耙管的软性缓冲装置 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5026863Y2 (ja) * | 1971-05-17 | 1975-08-11 | ||
JPS585507A (ja) * | 1981-06-30 | 1983-01-12 | Nissan Motor Co Ltd | シリンダ装置 |
JPS5888004U (ja) * | 1981-12-10 | 1983-06-15 | 九州東芝機械株式会社 | 衝撃力吸収装置 |
JPH0326477A (ja) * | 1989-06-19 | 1991-02-05 | Taiyo Ltd | スライドユニット |
JPH0720406Y2 (ja) * | 1988-11-10 | 1995-05-15 | 太陽鉄工株式会社 | スライドユニット |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2605751A (en) * | 1949-08-10 | 1952-08-05 | Perry Fay Company | Fluid pressure tool slide control assembly |
US2991760A (en) * | 1956-12-28 | 1961-07-11 | Jules A Rhine | Tool feed and control |
US4043254A (en) * | 1974-12-03 | 1977-08-23 | Emhart Industries, Inc. | Apparatus for cushioning the motion of a reciprocating member |
US4298373A (en) * | 1980-01-14 | 1981-11-03 | Owens-Illinois, Inc. | Apparatus for cushioning the motion of reciprocating members |
-
2002
- 2002-04-01 TW TW091106517A patent/TW593910B/zh not_active IP Right Cessation
- 2002-04-03 WO PCT/JP2002/003364 patent/WO2002090781A1/ja active Application Filing
- 2002-04-03 KR KR1020027017635A patent/KR20030014729A/ko not_active Application Discontinuation
- 2002-04-03 JP JP2002587815A patent/JP4398154B2/ja not_active Expired - Lifetime
- 2002-04-03 CN CN02801349A patent/CN1462346A/zh active Pending
- 2002-04-03 US US10/332,556 patent/US20030167914A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5026863Y2 (ja) * | 1971-05-17 | 1975-08-11 | ||
JPS585507A (ja) * | 1981-06-30 | 1983-01-12 | Nissan Motor Co Ltd | シリンダ装置 |
JPS5888004U (ja) * | 1981-12-10 | 1983-06-15 | 九州東芝機械株式会社 | 衝撃力吸収装置 |
JPH0720406Y2 (ja) * | 1988-11-10 | 1995-05-15 | 太陽鉄工株式会社 | スライドユニット |
JPH0326477A (ja) * | 1989-06-19 | 1991-02-05 | Taiyo Ltd | スライドユニット |
Also Published As
Publication number | Publication date |
---|---|
US20030167914A1 (en) | 2003-09-11 |
TW593910B (en) | 2004-06-21 |
KR20030014729A (ko) | 2003-02-19 |
JPWO2002090781A1 (ja) | 2004-08-26 |
CN1462346A (zh) | 2003-12-17 |
JP4398154B2 (ja) | 2010-01-13 |
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