WO2015178056A1 - シリンダ装置 - Google Patents
シリンダ装置 Download PDFInfo
- Publication number
- WO2015178056A1 WO2015178056A1 PCT/JP2015/055460 JP2015055460W WO2015178056A1 WO 2015178056 A1 WO2015178056 A1 WO 2015178056A1 JP 2015055460 W JP2015055460 W JP 2015055460W WO 2015178056 A1 WO2015178056 A1 WO 2015178056A1
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- WIPO (PCT)
- Prior art keywords
- cylinder device
- side chamber
- passage
- pipe
- rod
- Prior art date
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- 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
- F16F9/437—Drainage arrangements
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- 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
-
- 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
- F16F9/34—Special valve constructions; Shape or construction of throttling passages
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- 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
- F16F9/10—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using liquid only; using a fluid of which the nature is immaterial
- F16F9/14—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect
- F16F9/16—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts
- F16F9/18—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein
- F16F9/185—Bitubular units
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- 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
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- 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
- F16F2230/00—Purpose; Design features
- F16F2230/06—Fluid filling or discharging
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- 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
Definitions
- the present invention relates to a cylinder device.
- JP2008-25694A discloses a uniflow cylinder device in which a relief valve that provides resistance to the flow of hydraulic fluid passing therethrough is provided inside a bottom member that closes one end of an outer tube.
- a reservoir tank is formed between the inner tube and the outer tube.
- a pipe for guiding the hydraulic oil discharged from the rod side chamber to the bottom member is disposed in the reservoir tank.
- the gas mixed in the inner tube is discharged from the rod side chamber together with the hydraulic oil, so that the gas passes through the relief valve. For this reason, the differential pressure generated in the relief valve varies, and the operation of the cylinder device may become unstable.
- the object of the present invention is to operate the cylinder device stably.
- the cylinder device is an inner tube filled with hydraulic fluid, and a reservoir tank that is disposed so as to cover the inner tube and stores the hydraulic fluid between the inner tube. And an outer tube that is slidably inserted into the inner tube, and a piston that divides the inner tube into a rod side chamber and a piston side chamber, and is inserted into the inner tube so as to be able to advance and retreat, and is connected to the piston.
- a piston rod a rod guide for inserting the piston rod and closing one end of the inner tube and the outer tube, a first common passage through which the hydraulic fluid supplied to and discharged from the rod side chamber passes, A pipe that forms part of the first common passage and is disposed in the reservoir tank A pipe holder provided between the pipe and the rod guide and holding one end of the pipe; provided on the opposite side of the pipe from the pipe; and the first common passage and the reservoir tank. And a plug having a throttle passage communicating therewith.
- FIG. 1 is a circuit diagram when a cylinder device according to an embodiment of the present invention is an actuator.
- FIG. 2 is a circuit diagram when the cylinder device according to the embodiment of the present invention is a passive damper.
- FIG. 3 is a cross-sectional view of a main part of the cylinder device according to the embodiment of the present invention.
- FIG. 4 is a perspective view of the cylinder device according to the embodiment of the present invention.
- FIG. 5 is a view showing a modification of the cylinder device.
- the cylinder device 100 is, for example, an actuator that is interposed laterally between a vehicle body and a carriage of a railway vehicle and suppresses vibration in the left-right direction with respect to the traveling direction of the vehicle body.
- the cylinder device 100 includes a cylinder 1 filled with hydraulic oil as hydraulic fluid, a piston 2 that is slidably inserted into the cylinder 1 and divides the cylinder 1 into a rod side chamber 110 and a piston side chamber 120, and the cylinder 1.
- the piston rod 3 is inserted into the piston 2 and is connected to the piston 2, the reservoir tank 130 that stores hydraulic oil, and the first passage 140 that communicates the rod side chamber 110 and the piston side chamber 120.
- a second check valve 5 that allows only the flow of hydraulic oil toward the rod, a rod side chamber 110, a reservoir tank 130, Provided in the third passage 160 which communicates includes a relief valve 6 for regulating the pressure in the cylinder 1 to a predetermined pressure, the.
- the cylinder device 100 is provided in the fourth passage 170 that communicates the rod side chamber 110 and the piston side chamber 120, and communicates the first on-off valve 7 that opens and closes the fourth passage 170, and the piston side chamber 120 and the reservoir tank 130.
- the second on-off valve 8 provided in the fifth passage 180 for opening and closing the fifth passage 180 and the sixth passage 190 communicating the rod side chamber 110 and the reservoir tank 130 are provided from the reservoir tank 130 to the rod side chamber 110.
- a third check valve 11 to be permitted.
- the third passage 160, the fourth passage 170, and the sixth passage 190 communicate with the rod side chamber 110 through the first common passage 200 that supplies and discharges hydraulic oil to and from the rod side chamber 110. Further, the fourth passage 170 and the fifth passage 180 communicate with the piston side chamber 120 through the second common passage 210 that supplies and discharges hydraulic oil to and from the piston side chamber 120. The second passage 150 and the fifth passage 180 communicate with the piston side chamber 120 through a third common passage 220 that supplies hydraulic oil to the piston side chamber 120.
- the third passage 160, the fourth passage 170, and the sixth passage 190 may be communicated with the rod side chamber 110 without joining the first supply passage 200.
- the fourth passage 170 and the fifth passage 180 may be communicated with the piston-side chamber 120 without joining the second common passage 210, or the second passage 150 and the fifth passage 180 may be connected to the second passage 150.
- each may communicate with the piston side chamber 120.
- an orifice passage 15a that connects the rod side chamber 110 and the reservoir tank 130 is provided.
- the orifice passage 15a will be described later.
- the cylinder device 100 can be extended by driving the pump 9 with the first on-off valve 7 opened and the second on-off valve 8 closed.
- the rod side chamber 110 and the piston side chamber 120 communicate with each other through the fourth passage 170, and hydraulic oil is supplied to the rod side chamber 110 and the piston side chamber 120 so that the internal pressures of both increase equally.
- the pressure receiving area of the piston 2 is larger on the piston side chamber 120 side than on the rod side chamber 110 side. Therefore, when the pressure in the cylinder 1 rises as described above, the cylinder device 100 exhibits an extension operation in which the piston 2 moves to the rod side chamber 110 side, and the rod side chamber 110 from the pressure receiving area of the piston 2 on the piston side chamber 120 side. A thrust is generated by multiplying the area obtained by reducing the pressure receiving area on the side by the pressure in the cylinder 1.
- the relief valve 6 opens. After the valve opening, the relief valve 6 gives resistance to the flow of the working oil passing therethrough and generates a differential pressure before and after the relief valve 6.
- the cylinder device 100 adjusts the pressure in the cylinder 1 to a predetermined relief pressure by applying resistance to the flow of hydraulic oil passing through the third passage 160 by the relief valve 6.
- the relief valve 6 is provided with a proportional solenoid 6a, so that the relief pressure can be variably controlled. Therefore, the cylinder device 100 can change the pressure in the cylinder 1 by changing the relief pressure of the relief valve 6, and can change the generated thrust.
- the cylinder device 100 can be contracted by driving the pump 9 with the first on-off valve 7 closed and the second on-off valve 8 opened.
- the fourth passage 170 is blocked and the piston side chamber 120 and the reservoir tank 130 are communicated with each other through the fifth passage 180, so that the hydraulic oil is supplied only to the rod side chamber 110 and the internal pressure rises.
- the cylinder device 100 exhibits a contraction operation in which the piston 2 moves to the piston side chamber 120 side, and generates a thrust obtained by multiplying the pressure receiving area of the piston 2 on the rod side chamber 110 side by the pressure in the rod side chamber 110.
- the cross-sectional area of the piston rod 3 is set to 1 ⁇ 2 of the cross-sectional area of the piston 2 so that the pressure receiving area on the rod side chamber 110 side of the piston 2 is 1 ⁇ 2 of the pressure receiving area on the piston side chamber 120 side. I have to. For this reason, if the pressure in the rod side chamber 110 during the expansion operation and the contraction operation of the cylinder device 100 is made equal, the thrust generated by the cylinder device 100 can be made equal between the expansion operation and the contraction operation. Further, the flow rate of the hydraulic oil with respect to the displacement amount of the cylinder device 100 can be made equal.
- the cylinder device 100 can be used as a passive damper by closing the first on-off valve 7 and the second on-off valve 8.
- the rod 2 chamber 110 When the cylinder device 100 is extended by an external force, the rod 2 chamber 110 is reduced by moving the piston 2 toward the rod side chamber 110, and the reduced volume of hydraulic oil is discharged from the rod side chamber 110. At this time, the hydraulic oil is supplied from the reservoir tank 130 through the second passage 150 to the piston side chamber 120 that is enlarged by the movement of the piston 2 toward the rod side chamber 110.
- the third check valve 11 is provided between the pump 9 and the cylinder 1 in the sixth passage 190. For this reason, the hydraulic oil discharged from the rod side chamber 110 returns to the reservoir tank 130 through the third passage 160.
- the relief valve 6 Since the relief valve 6 is provided in the third passage 160, the pressure in the rod side chamber 110 when the cylinder device 100 is extended rises to the relief pressure set by the relief valve 6. Therefore, the cylinder device 100 generates a damping force obtained by multiplying the pressure receiving area of the piston 2 on the rod side chamber 110 side by the pressure in the rod side chamber 110.
- the cylinder device 100 since the first check valve 4 is opened and the rod side chamber 110 and the piston side chamber 120 communicate with each other, the pressure in the rod side chamber 110 and the pressure in the piston side chamber 120 are set by the relief valve 6. Increases to relief pressure. Therefore, the cylinder device 100 generates a damping force that is obtained by multiplying the pressure-receiving area of the piston 2 on the piston-side chamber 120 side by the pressure-receiving area on the rod-side chamber 110 side by the pressure in the cylinder 1.
- the first on-off valve 7 and the second on-off valve 8 of the present embodiment are normally closed on-off valves as shown in FIG. Accordingly, the cylinder device 100 functions as a passive damper when not energized.
- the relief valve 6 includes the proportional solenoid 6a, and the relief pressure can be variably controlled. Therefore, the cylinder device 100 can variably control the damping force.
- the cylinder device 100 can also be configured as a passive damper 300 as shown in FIG.
- the first common passage 200, the second common passage 210, the third common passage 220, the fourth passage 170, the fifth passage 180, the sixth passage 190, The 1 on-off valve 7, the second on-off valve 8, the pump 9, and the motor 10 are not necessary.
- a damping valve 30 is provided in place of the relief valve 6.
- the damping valve 30 is a damping force generating element that provides resistance to the flow of hydraulic oil passing through the third passage 160.
- the damping valve 30 is the same as that of the case where the cylinder apparatus 100 is used as an actuator.
- FIG. 3 is a cross-sectional view of the main part of the cylinder device 100.
- FIG. 4 is a perspective view of the cylinder device 100.
- the cylinder device 100 is disposed so as to cover the cylinder 1 serving as an inner tube, and is disposed in the reservoir tank 130 and the outer tube 12 that forms the reservoir tank 130 with the cylinder 1.
- the rod guide 16 includes a press-fit portion 16a that is press-fitted into the inner periphery of the cylinder 1, a large-diameter portion 16b that has a larger diameter than the press-fit portion 16a, and a flange portion 16c that coaxially positions the cylinder 1 with respect to the outer tube 12.
- the engaging portion 16d is formed in the flange portion 16c, and the notch portion 16e is formed on the surface that comes into contact with the cylinder 1 when press-fitted into the cylinder 1.
- the rod guide 16 slidably supports the piston rod 3 via a bush 17 press-fitted into the inner periphery.
- Seal members 50 and 51 are provided between the rod guide 16 and the outer tube 12 and between the rod guide 16 and the piston rod 3 to prevent hydraulic fluid from leaking to the outside.
- the valve mechanism 18 is attached to the end of the cylinder 1 on the piston side chamber 120 side.
- the end of the outer tube 12 on the piston side chamber 120 side is closed by the bottom member 19.
- the bottom surface of the bottom member 19 is provided with a seat surface 19a on which the valve mechanism 18 is seated.
- the seat surface 19a is provided with a notch 19b.
- the third passage 160, the fifth passage 180, and the sixth passage 190 are connected to the notch 19b. That is, the 3rd channel
- An insertion hole 19c into which one end of the pipe 13 is inserted is provided on a surface of the bottom member 19 between the cylinder 1 and the outer tube 12 and forming a part of the reservoir tank 130.
- the first opening / closing valve 7, the second opening / closing valve 8, the relief valve 6, the pump 9, the motor 10, and the third check valve 11 are fixed to the bottom member 19.
- an attachment portion 19d for attaching the cylinder device 100 to a vehicle body in the vehicle is provided at the end portion of the bottom member 19.
- a lock nut 20 is screwed into the opening of the outer tube 12 on the piston rod 3 side.
- the valve mechanism 18, the cylinder 1, and the rod guide 16 are sandwiched between the bottom member 19 and the lock nut 20.
- the valve mechanism 18 includes a base 21, a second check valve 5, a spring 22, and a spring holding member 23.
- the base 21 has a disk shape, protrudes toward the bottom member 19 and is provided at the center, a through hole 21b passing through the center, and a recess 21c provided at the piston side chamber 120. It has the 2nd channel
- the seat 19a of the bottom member 19 is provided with a notch 19b. For this reason, when the cylinder 1 to which the valve mechanism 18 is attached is seated on the bottom member 19, the reservoir tank 130 and the piston side chamber 120 communicate with each other through the notch 19 b and the second passage 150.
- the second check valve 5 is an annular disk valve and is disposed in the recess 21c of the base 21 to close the second passage 150.
- the spring 22 is disposed on the piston side chamber 120 side of the second check valve 5.
- the spring holding member 23 is annular and is fitted into an annular groove 21d provided in the recess 21c. The spring 22 is compressed between the second check valve 5 and the spring holding member 23, and always urges the second check valve 5 toward the base 21 side.
- the second check valve 5 opens and closes due to the differential pressure between the reservoir tank 130 and the piston side chamber 120 when the cylinder device 100 is operated, and allows only the flow of hydraulic oil toward the piston side chamber 120 from the reservoir tank 130.
- the bottom member 19 is provided with an insertion hole 19e into which the cylindrical portion 21a of the base 21 is inserted when the valve mechanism 18 is seated on the seating surface 19a.
- a second common passage 210 is connected to the insertion hole 19e. That is, the fourth passage 170 and the fifth passage 180 communicate with the piston side chamber 120 through the through hole 21 b of the base 21.
- seal members 52 and 53 for preventing hydraulic oil from leaking from the piston side chamber 120 to the reservoir tank 130 are provided.
- a first small diameter portion 3b having a diameter smaller than that of the main body portion 3a and a second small diameter portion 3c having a diameter smaller than that of the first small diameter portion 3b are provided.
- an attachment member 24 for attaching the cylinder device 100 to a carriage in the vehicle is connected to the end of the piston rod 3 opposite to the bottom member 19.
- the piston 2 has a first passage 140 that is opened in the rod side chamber 110 and the piston side chamber 120, and is fixed to the second small diameter portion 3 c of the piston rod 3 with a nut 25.
- a first check valve 4 is disposed on the rod side chamber 110 side of the piston 2.
- the first check valve 4 is an annular disc valve, and is held on the outer periphery of the first small diameter portion 3b of the piston rod 3 to close the first passage 140 of the piston 2.
- a spring 26 is disposed between the first check valve 4 and the main body portion 3a of the piston rod 3 and on the outer periphery of the first small diameter portion 3b. The spring 26 is compressed between the first check valve 4 and the main body 3a, and always biases the first check valve 4 toward the piston 2 side.
- the first check valve 4 opens and closes due to the differential pressure between the rod side chamber 110 and the piston side chamber 120 when the cylinder device 100 is operated, and allows only the flow of hydraulic oil from the piston side chamber 120 toward the rod side chamber 110.
- the pipe holder 14 is formed in an annular shape.
- the pipe holder 14 has an annular groove 14a formed on the inner periphery, an engagement portion 14b formed on the outer periphery and engaged with the positioning pin 27, and formed on the surface of the pipe 13 so that one end of the pipe 13 is inserted.
- the portion where the pipe holder 14 is fitted on the outer periphery of the cylinder 1 is a small-diameter portion 1a having a smaller diameter than other portions. Further, as shown in FIG. 3, the flange portion 16 c of the rod guide 16 is provided at a position close to the end face of the pipe holder 14 in a state where the pipe holder 14 and the rod guide 16 are assembled to the cylinder 1. Thereby, the position of the pipe holder 14 in the axial direction is defined.
- the positioning pin 27 as a rotation preventing member inserted into the through hole 12a of the outer tube 12 is engaged with the engaging portion 14b of the pipe holder 14. Thereby, the relative rotation of the pipe holder 14 and the outer tube 12 is restricted.
- the positioning pin 27 is fixed to the outer tube 12 by brazing, for example.
- the through hole 12a of the outer tube 12 is closed by brazing when the positioning pin 27 is fixed.
- the insertion hole 14c of the pipe holder 14 is provided so as to be positioned coaxially with the insertion hole 19c of the bottom member 19 in a state where the relative rotation between the pipe holder 14 and the outer tube 12 is restricted by the positioning pin 27.
- the annular groove 14 a of the pipe holder 14 is provided at a position facing the notch 16 e of the rod guide 16. Thereby, the annular groove 14a and the rod side chamber 110 communicate with each other through the notch 16e.
- the large-diameter portion 16b of the rod guide 16 has the same diameter as the small-diameter portion 1a of the cylinder 1 and is fitted to the inner periphery of the pipe holder 14.
- seal members 54 and 55 are provided between the pipe holder 14 and the cylinder 1 and between the pipe holder 14 and the rod guide 16, seal members 54 and 55 are provided for preventing hydraulic fluid from leaking from the annular groove 14a to the reservoir tank 130.
- the pipe 13 includes a cylindrical main body portion 13a and a cylindrical attachment member 13b that is thicker than the main body portion 13a and is fitted to both ends of the main body portion 13a.
- the pipe 13 has one end inserted into the insertion hole 14 c of the pipe holder 14 and the other end inserted into the insertion hole 19 c of the bottom member 19, and is held by the pipe holder 14 and the bottom member 19.
- the insertion hole 14c of the pipe holder 14 opens into an annular groove 14a provided on the inner periphery. For this reason, when the pipe 13 is inserted into the insertion hole 14c of the pipe holder 14, the pipe 13 and the annular groove 14a communicate with each other.
- the rod side chamber 110 and the pipe 13 communicate with each other by the annular groove 14a formed on the inner periphery of the pipe holder 14. According to this, even if the communication path that connects the rod side chamber 110 and the pipe 13 is configured by the pipe holder 14, the pipe holder 14 can be formed into a shape that can be easily processed.
- first common passage 200 is connected to the insertion hole 19c of the bottom member 19, and when the pipe 13 is inserted into the insertion hole 19c of the bottom member 19, the first common passage 200 and the pipe 13 communicate with each other. Thereby, the first common passage 200 communicates with the rod side chamber 110 through the annular groove 14 a of the pipe holder 14 and the pipe 13.
- the first common passage 200 provided on the bottom member 19 side and the rod side chamber 110 communicate with each other through the pipe 13 provided in the reservoir tank 130. Therefore, the relief valve 6, the first on-off valve 7, the pump 9, and the third check valve 11 provided in the third passage 160, the fourth passage 170, and the sixth passage 190, respectively, as shown in FIG. Along with the second on-off valve 8 and the motor 10, it can be fixed to the bottom member 19.
- Seal members 56, 57, 58 and 59 are provided for preventing hydraulic oil from leaking from the pipe 13 to the reservoir tank 130, respectively.
- a general pipe material is thin, and for example, it may be difficult to form an annular groove for fitting a sealing member such as an O-ring.
- the attachment members 13b thicker than the main body 13a are provided at both ends of the main body 13a of the pipe 13. For this reason, as shown in FIG. 3, by providing annular grooves 13c and 13d in the attachment member 13b, seal members 56, 57, 58 and 59 for preventing hydraulic oil from leaking from the pipe 13 to the reservoir tank 130 are provided. Can be easily provided.
- the plug 15 has a cylindrical shape, and an orifice passage 15a is formed on the inner periphery.
- the mounting hole 14d of the pipe holder 14 is a through hole that opens into an annular groove 14a provided on the inner periphery. For this reason, when the plug 15 is fitted in the mounting hole 14d, the annular groove 14a and the reservoir tank 130 communicate with each other through the orifice passage 15a of the plug 15.
- the plug 15 is provided so as to protrude from the surface of the pipe holder 14 on the rod guide 16 side as shown in FIG. 3 when fitted in the mounting hole 14d of the pipe holder 14. A portion of the plug 15 protruding from the pipe holder 14 is engaged with the engaging portion 16 d of the rod guide 16.
- a seal member 60 is provided between the plug 15 and the pipe holder 14 for preventing hydraulic oil from leaking into the reservoir tank 130 from the gap.
- the thrust and damping force generated by the cylinder device 100 are adjusted by the set pressure of the relief valve 6 as described above. For this reason, when the gas passes through the relief valve 6 and the differential pressure varies, the pressure in the cylinder 1 may fluctuate and the operation of the cylinder device 100 may become unstable.
- the gas discharged from the rod side chamber 110 can be efficiently discharged to the reservoir tank 130. Therefore, the amount of gas passing through the pipe 13 and reaching the relief valve 6 can be reduced, and the operation of the cylinder device 100 can be stabilized.
- the position of the plug 15 on the circumference of the pipe holder 14 can be set arbitrarily.
- the plug is so arranged that the orifice passage 15a opens below the oil level of the hydraulic oil stored in the reservoir tank 130, that is, in the oil. If the position 15 is set, the hydraulic oil can be discharged directly from the orifice passage 15a into the oil. According to this, foaming of the hydraulic oil stored in the reservoir tank 130 and mixing of gas into the hydraulic oil can be suppressed.
- the insertion hole 14c and the mounting hole 14d of the pipe holder 14 are provided coaxially. According to this, the through-hole opened to the surface by the side of the pipe 13 and the surface by the side of the rod guide 16 is formed in the pipe holder 14 by the insertion hole 14c and the mounting hole 14d.
- a rod-shaped jig is inserted into the insertion hole 19c of the bottom member 19, and first the pipe 13 is inserted through the jig and assembled to the cylinder device 100. Subsequently, the insertion hole 14c and the mounting hole 14d The pipe holder 14 can be assembled to the cylinder device 100 by inserting the through hole formed by the above through a jig. According to this, since the pipe 13 and the pipe holder 14 can be easily positioned, the assemblability of the cylinder device 100 is improved.
- the portion of the plug 15 that protrudes from the pipe holder 14 engages with the engaging portion 16d of the rod guide 16, so that the relative rotation between the pipe holder 14 and the rod guide 16 is restricted by the plug 15. .
- the relative rotation between the outer tube 12 and the pipe holder 14 is restricted by the positioning pin 27, the relative rotation between the rod guide 16 and the outer tube 12 is also restricted. Therefore, the relative positions in the rotation direction of the outer tube 12, the pipe holder 14, and the rod guide 16 can be determined at arbitrary positions.
- the gas mixed in the cylinder 1 is discharged from the notch 16e of the rod guide 16 to the annular groove 14a of the pipe holder 14. For this reason, when the cylinder device 100 is installed sideways, in order to efficiently discharge the gas from the cylinder 1, the notch portion 16e of the rod guide 16 can be positioned above the cylinder 1, that is, above the cylinder 1. That's fine.
- the cylinder device 100 fixes the valve mechanism 18, the cylinder 1, and the rod guide 16 in the outer tube 12 by screwing the lock nut 20 into the opening of the outer tube 12. For this reason, for example, when the rod guide 16 is provided so as to be rotatable with respect to the outer tube 12, the rod guide 16 is rotated by contact friction when the lock nut 20 is fastened, and the notch portion 16 e is placed at an arbitrary position. It becomes difficult to provide in.
- the positioning pin 27 restricts relative rotation between the outer tube 12 and the pipe holder 14 and the plug 15 restricts relative rotation between the pipe holder 14 and the rod guide 16.
- the rod guide 16 does not rotate relative to the outer tube 12. Therefore, when the cylinder device 100 is installed sideways, the notch 16e of the rod guide 16 can be positioned upward, and the gas mixed in the cylinder 1 can be efficiently discharged.
- the pipe holder 14 holds one end of the pipe 13, the phase of the insertion hole 14 c of the pipe holder 14 and the insertion hole 19 c of the bottom member 19 is rotated when the cylinder device 100 is assembled. If they are shifted, the pipe 13 may come out of the insertion holes 14c and 19c.
- the relative rotation between the pipe holder 14 and the rod guide 16 is restricted by using the plug 15 provided to efficiently discharge the gas.
- the plug 15 is fitted in the mounting hole 14d of the pipe holder 14, and a portion protruding from the pipe holder 14 is engaged with the engaging portion 16d of the rod guide 16. That is, the plug 15 is provided so as to be within the range of the axial length of the pipe holder 14 and the rod guide 16. According to this, the plug 15 can be provided without increasing the axial length of the cylinder device 100.
- the annular groove 14 a of the pipe holder 14 that constitutes a part of the first common passage 200 and communicates with the rod side chamber 110 and the pipe 13 is formed in the plug 15. Since the passage 15a communicates with the reservoir tank 130, a part of the hydraulic oil discharged from the rod side chamber 110 is discharged to the reservoir tank 130 through the orifice passage 15a. At this time, since a differential pressure is generated before and after the orifice passage 15a, the gas mixed into the hydraulic oil and discharged from the rod side chamber 110 can be efficiently discharged to the reservoir tank 130 on the low pressure side. Therefore, the amount of gas passing through the pipe 13 and reaching the relief valve 6 can be reduced, and the operation of the cylinder device 100 can be stabilized.
- the insertion hole 14c and the mounting hole 14d of the pipe holder 14 are provided coaxially. According to this, the through-hole opened to the surface by the side of the pipe 13 and the surface by the side of the rod guide 16 is formed in the pipe holder 14 by the insertion hole 14c and the mounting hole 14d.
- a rod-shaped jig is inserted into the insertion hole 19c of the bottom member 19, and first the pipe 13 is inserted through the jig and assembled to the cylinder device 100. Subsequently, the insertion hole 14c and the mounting hole 14d The pipe holder 14 can be assembled to the cylinder device 100 by inserting the through hole formed by the above through a jig. According to this, since the pipe 13 and the pipe holder 14 can be easily positioned, the assemblability of the cylinder device 100 is improved.
- the rod side chamber 110 and the pipe 13 are communicated with each other by an annular groove 14 a formed on the inner periphery of the pipe holder 14. According to this, even if the passage for communicating the rod side chamber 110 and the pipe 13 is constituted by the pipe holder 14, the pipe holder 14 can be formed into a shape that can be easily processed.
- one end of the plug 15 is fitted in the mounting hole 14 d of the pipe holder 14, and a portion protruding from the pipe holder 14 is provided so as to engage with the engaging portion 16 d of the rod guide 16. That is, the plug 15 is provided so as to be within the range of the axial length of the pipe holder 14 and the rod guide 16. According to this, the plug 15 can be provided without increasing the axial length of the cylinder device 100.
- the pipe 13 is configured to include attachment members 13b that are thicker than the main body portion 13a at both ends of the main body portion 13a, the annular tanks 13c and 13d are provided in the attachment member 13b, so that the reservoir tank is removed from the pipe 13. Seal members 56, 57, 58, 59 for preventing hydraulic oil from leaking to 130 can be easily provided.
- the relative rotation between the pipe holder 14 and the rod guide 16 is regulated using the plug 15 provided for efficiently discharging the gas, the positioning for regulating the relative rotation between the pipe holder 14 and the outer tube 12 is performed.
- the pin 27 By providing only the pin 27, it is possible to realize a structure that restricts the relative rotation of the outer tube 12, the pipe holder 14, and the rod guide 16 while suppressing an increase in the number of parts and cost.
- the relief valve 6 is provided in the third passage 160 to provide resistance to the flow of hydraulic oil passing therethrough.
- a throttle using a disk valve is used according to a desired thrust characteristic or damping force characteristic.
- a valve or the like may be provided.
- the pump 9 may be made into the one-way pump which cannot be reversely rotated, The motor 9 may hold the pump 9 so as not to rotate.
- the rod side chamber 110 and the annular groove 14a of the pipe holder 14 communicate with each other by the notch 16e provided in the rod guide 16.
- a hole 1b may be provided so that the rod side chamber 110 and the annular groove 14a communicate with each other.
- the pipe 13 when the cylinder apparatus 100 is installed sideways so that the notch part 16e of the rod guide 16 may be located above the cylinder 1, as shown in FIG. 3, the pipe 13 is located below.
- the position of the pipe 13 need not be downward.
- the position of the pipe 13 is set to a position where the oil level of the reservoir tank 130 is applied when the cylinder device 100 is extended to the maximum, the ripples of the oil level due to vibration can be suppressed, and the reservoir tank 130 enters the cylinder 1. Of gas can be suppressed.
- the plug 15 is provided with the orifice passage 15a.
- any choke passage may be used as long as it is a throttle passage that can generate a differential pressure.
- the pump 9 is driven by the motor 10, but drive means other than the motor may be used.
- hydraulic fluid is used as the hydraulic fluid, but other liquids such as water may be used.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Damping Devices (AREA)
- Actuator (AREA)
Abstract
Description
Claims (10)
- シリンダ装置であって、
作動液が充填されるインナーチューブと、
前記インナーチューブを覆って配設され、前記インナーチューブとの間に前記作動液を貯留するリザーバタンクを形成するアウターチューブと、
前記インナーチューブに摺動自在に挿入され、前記インナーチューブ内をロッド側室とピストン側室とに区画するピストンと、
前記インナーチューブに進退自在に挿入され、前記ピストンと連結されるピストンロッドと、
前記ピストンロッドが挿入されるとともに、前記インナーチューブおよび前記アウターチューブの一端を閉塞するロッドガイドと、
前記ロッド側室へ給排される前記作動液が通過する第1共通通路と、
前記第1共通通路の一部を形成し、前記リザーバタンク内に配設されるパイプと、
前記パイプと前記ロッドガイドとの間に設けられ、前記パイプの一端を保持するパイプホルダと、
前記パイプホルダにおける前記パイプとは反対側に設けられ、前記第1共通通路と前記リザーバタンクとを連通する絞り通路を有するプラグと、
を備えるシリンダ装置。 - 請求項1に記載のシリンダ装置であって、
前記パイプと前記プラグとは、前記パイプホルダを介して同軸に配置される、
シリンダ装置。 - 請求項1に記載のシリンダ装置であって、
前記ロッド側室と前記パイプとを連通する連通路を有し、
前記連通路は、前記パイプホルダの内周に形成された溝からなる、
シリンダ装置。 - 請求項1に記載のシリンダ装置であって、
前記インナーチューブおよび前記アウターチューブの他端を閉塞し、前記パイプの他端を保持するボトム部材を備え、
前記パイプは、
本体部と、
前記本体部よりも厚肉であって、前記本体部の両端にそれぞれ嵌装される取付部材と、
を備え、
前記ロッド側室側の前記取付部材と前記パイプホルダとの間、前記ピストン側室側の前記取付部材と前記ボトム部材との間、および前記取付部材と前記本体部との間には、それぞれシール部材が設けられる、
シリンダ装置。 - 請求項1に記載のシリンダ装置であって、
前記アウターチューブと前記パイプホルダとに係合し、前記アウターチューブと前記パイプホルダとの相対回転を規制する回り止め部材を備える、
シリンダ装置。 - 請求項1に記載のシリンダ装置であって、
前記パイプホルダには、前記プラグが嵌装される貫通孔が形成され、
前記プラグは、前記貫通穴に嵌装したときに前記パイプホルダの端面から突出し、
前記ロッドガイドには、前記プラグと係合する係合部が形成される、
シリンダ装置。 - 請求項1に記載のシリンダ装置であって、
前記ピストン側室へ給排される前記作動液が通過する第4通路を有し、
前記第4通路は、前記第1共通通路を通じて前記ロッド側室と連通する、
シリンダ装置。 - 請求項1に記載のシリンダ装置であって、
前記ロッド側室と前記リザーバタンクとを連通する第3通路と、
前記第3通路の途中に設けられ、前記第3通路を通過する前記作動液の流れに抵抗を与えるリリーフ弁と、
を備えるシリンダ装置。 - 請求項3に記載のシリンダ装置であって、
前記シリンダ装置を横向きに設置した場合において、前記連通路と前記ロッド側室とは、前記インナーチューブの上方で連通する、
シリンダ装置。 - 請求項7に記載のシリンダ装置であって、
前記ロッド側室および前記ピストン側室に前記作動液を供給するポンプと、
前記ポンプを駆動するモータと、
前記第4通路の途中に設けられ、前記第4通路を開閉する第1開閉弁と、
前記ピストン側室と前記リザーバタンクとを連通する第5通路と、
前記第5通路の途中に設けられ、前記第5通路を開閉する第2開閉弁と、
を備えるシリンダ装置。
Priority Applications (5)
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KR1020167022509A KR101893666B1 (ko) | 2014-05-23 | 2015-02-25 | 실린더 장치 |
EP15796073.3A EP3106708B1 (en) | 2014-05-23 | 2015-02-25 | Cylinder device |
US15/122,732 US10054183B2 (en) | 2014-05-23 | 2015-02-25 | Cylinder device |
CA2940831A CA2940831C (en) | 2014-05-23 | 2015-02-25 | Cylinder device comprising a common passage through which working oil that is supplied to and discharged from a rod-side chamber passes |
CN201580012603.6A CN106068399B (zh) | 2014-05-23 | 2015-02-25 | 作动缸装置 |
Applications Claiming Priority (2)
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JP2014106934A JP6336822B2 (ja) | 2014-05-23 | 2014-05-23 | シリンダ装置 |
JP2014-106934 | 2014-05-23 |
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WO2015178056A1 true WO2015178056A1 (ja) | 2015-11-26 |
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PCT/JP2015/055460 WO2015178056A1 (ja) | 2014-05-23 | 2015-02-25 | シリンダ装置 |
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US (1) | US10054183B2 (ja) |
EP (1) | EP3106708B1 (ja) |
JP (1) | JP6336822B2 (ja) |
KR (1) | KR101893666B1 (ja) |
CN (1) | CN106068399B (ja) |
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RU176369U1 (ru) * | 2016-11-14 | 2018-01-17 | Общество с ограниченной ответственностью "Первоуральский Автоагрегатный завод" | Гидравлический амортизатор |
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EP3115620B1 (en) * | 2014-05-23 | 2018-10-03 | KYB Corporation | Cylinder device |
JP6368204B2 (ja) * | 2014-09-19 | 2018-08-01 | Kyb株式会社 | 鉄道用制振装置 |
JP6845643B2 (ja) * | 2016-09-20 | 2021-03-24 | Kyb株式会社 | ショックアブソーバ |
CN107327447A (zh) * | 2017-07-28 | 2017-11-07 | 重集团大连工程技术有限公司 | 一种适用于取消溢流阀的前置泵压力范围保护回路 |
CN107202042A (zh) * | 2017-07-28 | 2017-09-26 | 重集团大连工程技术有限公司 | 一种取消溢流阀的前置泵恒压回路 |
JP6933985B2 (ja) * | 2018-01-31 | 2021-09-08 | Kyb株式会社 | 液圧機器 |
JP7285750B2 (ja) * | 2019-09-26 | 2023-06-02 | 日立Astemo株式会社 | 緩衝器 |
JP7393303B2 (ja) | 2020-06-09 | 2023-12-06 | カヤバ株式会社 | シリンダ装置 |
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- 2015-02-25 US US15/122,732 patent/US10054183B2/en not_active Expired - Fee Related
- 2015-02-25 CA CA2940831A patent/CA2940831C/en not_active Expired - Fee Related
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Also Published As
Publication number | Publication date |
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KR20160110489A (ko) | 2016-09-21 |
CA2940831A1 (en) | 2015-11-26 |
JP2015222110A (ja) | 2015-12-10 |
EP3106708A4 (en) | 2017-11-15 |
US10054183B2 (en) | 2018-08-21 |
EP3106708B1 (en) | 2019-01-30 |
JP6336822B2 (ja) | 2018-06-06 |
CA2940831C (en) | 2018-11-27 |
CN106068399A (zh) | 2016-11-02 |
CN106068399B (zh) | 2019-01-01 |
EP3106708A1 (en) | 2016-12-21 |
KR101893666B1 (ko) | 2018-08-30 |
US20170067527A1 (en) | 2017-03-09 |
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