WO2016063944A1 - 液圧機器 - Google Patents
液圧機器 Download PDFInfo
- Publication number
- WO2016063944A1 WO2016063944A1 PCT/JP2015/079822 JP2015079822W WO2016063944A1 WO 2016063944 A1 WO2016063944 A1 WO 2016063944A1 JP 2015079822 W JP2015079822 W JP 2015079822W WO 2016063944 A1 WO2016063944 A1 WO 2016063944A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cylinder
- pipe
- side chamber
- passage
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
-
- 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
-
- 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
-
- 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
- F16F9/44—Means on or in the damper for manual or non-automatic adjustment; such means combined with temperature correction
- F16F9/46—Means on or in the damper for manual or non-automatic adjustment; such means combined with temperature correction allowing control from a distance, i.e. location of means for control input being remote from site of valves, e.g. on damper external wall
-
- 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
- F16F9/50—Special means providing automatic damping adjustment, i.e. self-adjustment of damping by particular sliding movements of a valve element, other than flexions or displacement of valve discs; Special means providing self-adjustment of spring characteristics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
- B61F5/00—Constructional details of bogies; Connections between bogies and vehicle underframes; Arrangements or devices for adjusting or allowing self-adjustment of wheel axles or bogies when rounding curves
- B61F5/02—Arrangements permitting limited transverse relative movements between vehicle underframe or bolster and bogie; Connections between underframes and bogies
- B61F5/22—Guiding of the vehicle underframes with respect to the bogies
- B61F5/24—Means for damping or minimising the canting, skewing, pitching, or plunging movements of the underframes
- B61F5/245—Means for damping or minimising the canting, skewing, pitching, or plunging movements of the underframes by active damping, i.e. with means to vary the damping characteristics in accordance with track or vehicle induced reactions, especially in high speed mode
-
- 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
- F16F2228/00—Functional characteristics, e.g. variability, frequency-dependence
- F16F2228/06—Stiffness
- F16F2228/066—Variable stiffness
Definitions
- the present invention relates to a hydraulic device.
- the damper includes a cylinder connected to one of the bogie and the vehicle body of the railway vehicle, a piston that is slidably inserted into the cylinder, and the other of the piston, the bogie, and the vehicle body that is inserted into the cylinder.
- a rod connected to the cylinder, a rod side chamber and a piston side chamber partitioned by a piston in a cylinder, a tank, a first on-off valve provided in the middle of a first passage communicating the rod side chamber and the piston side chamber, a piston side chamber, A second opening / closing valve provided in the middle of the second passage communicating with the tank, a discharge passage connecting the rod side chamber to the tank, and a variable relief valve provided in the middle of the discharge passage are provided.
- the damping force generated during expansion and contraction can be adjusted by the variable relief valve. Further, when the first on-off valve is opened and the second on-off valve is closed, the extension side chamber and the pressure side chamber are in communication with each other, and hydraulic fluid is not pushed out from the cylinder to the discharge passage during extension. Although the damping force can be exhibited, the extension side does not exhibit the damping force.
- the damper when the first on-off valve is closed and the second on-off valve is opened, the pressure side chamber and the tank are brought into communication with each other, and the hydraulic oil is not pushed out from the inside of the cylinder to the discharge passage due to contraction, and the damper is attenuated on the extension side. Although the force can be exhibited, the pressure side does not exhibit the damping force.
- the damper When the damper is configured in this way, the damper can be set to a so-called single effect by opening and closing the first on-off valve and the second on-off valve, and the damper does not automatically generate a damping force in a region where the skyhook control force cannot be generated. Therefore, the semi-active control of the rail car body can be easily performed.
- the damper as described above generally employs a structure in which an outer cylinder covering the cylinder is provided and a tank is provided between the cylinder and the outer cylinder.
- the damper needs to be provided with a first passage to communicate the extension side chamber to the compression side chamber without a tank.
- the first passage is exposed to the outside, so that a structure that accommodates in the tank is adopted.
- the damper is welded to one end of an outer cylinder 101 that covers the cylinder 100 and closes one end of the outer cylinder 101, and is welded to the other end of the outer cylinder 101.
- a rod guide 105 that is bolted to the head cap 103 and guides the movement of the rod 104.
- the first passage is formed between the cylinder 100 and the outer cylinder 101. It is formed by a pipe 106 accommodated in the tank.
- the pipe 106 passes through the head cap 103 and is bridged between the bottom cap 102 and the head cap 103.
- the pipe 106 is brazed into the hole provided in the bottom cap 102, and then the cylinder 100 and the outer cylinder 101 are assembled to the bottom cap 102. Further, the head cap 103 is fitted into the outer cylinder 101 while the pipe 106 is passed through a hole provided in the head cap 103 so that an excessive load is not applied to the brazed pipe 106, and the head cap 103 is fitted into the outer cylinder 101. Weld.
- the rod guide 105 is laminated on the head cap 103. In this case as well, it is necessary to pass the pipe 106 through the hole provided in the rod guide 105. It is necessary to assemble carefully so as not to apply excessive load. When a load is applied to the pipe 106, the portion brazed to the bottom cap 102 is peeled off, the tank and the pipe 106 are communicated with each other, and the damper becomes a defective product, so that careful work is required. Since such work is required, the assembly work becomes very troublesome.
- the rod guide 105 is fitted to the outer periphery of the right end of the cylinder 100 in the drawing and holds the cylinder 100 together with the bottom cap 102, but it is difficult to apply an axial force to the cylinder 100.
- the conventional damper cannot apply an axial force to the cylinder 100, the cylinder 100 is idle in the axial direction inside the damper. Then, when the piston 107 in the cylinder 100 moves, the cylinder 100 also moves due to friction, and the expansion side chamber and the compression side chamber are neither compressed nor expanded, resulting in a situation where the damping force cannot be exerted. Therefore, in the conventional damper, there is a problem that a dead zone in which a force cannot be exerted unless the piston 107 moves more than the axial play of the cylinder 100 is generated.
- the present invention was devised to improve the above-mentioned problems, and the object of the present invention is to provide a hydraulic device that has no dead band in generating force and does not cause contamination.
- the hydraulic device in the problem solving means of the present invention includes a bottom cap and a head cap that are respectively welded to the outer cylinder, and a rod guide that is fastened to the head cap, and one end of the pipe is provided.
- the bottom cap and the other end of the pipe are fitted to the rod guide, and the cylinder is sandwiched between the bottom cap and the rod guide. Therefore, the hydraulic device of the present invention can add axial force to the cylinder while supporting the pipe, the interior of which is isolated from the tank, by the bottom cap and the rod guide. In the hydraulic device of the present invention, it is not necessary to braze the pipe to the bottom cap.
- the actuator A is configured to suppress the lateral movement of the vehicle body B of the railway vehicle.
- the actuator A includes a cylinder 1, a rod 2 that is movably inserted into the cylinder 1, an outer cylinder 3 that accommodates the cylinder 1 inside, and between the cylinder 1 and the outer cylinder 3. 1, a bottom cap 4 coupled to the left end in FIG. 1 that is one end of the outer cylinder 3, and an annular head cap 5 coupled to the right end in FIG. 1 that is the other end of the outer cylinder 3.
- the rod guide 6 that is fastened to the head cap 5 and guides the movement of the rod 2 inserted inside, and is accommodated in the tank T and sandwiched between the bottom cap 4 and the rod guide 6, And a pipe 7 forming a passage to be isolated.
- the actuator A also includes a hydraulic circuit C communicated with the cylinder 1 by a pipe 7 and can be actively expanded and contracted by supplying hydraulic pressure from a pump 32 provided in the hydraulic circuit C. is there. As shown in FIG. 2, the actuator A is interposed as a pair between the carriage W and the vehicle body B of the railway vehicle, and suppresses horizontal and horizontal vibrations relative to the vehicle traveling direction of the vehicle body B. Thus, it is used as a vibration damping device for the vehicle body B.
- the cylinder 1 has a cylindrical shape, and one end that is the left end in FIG. 1 is closed by a valve case 9, and the rod guide 6 is fitted to the other end that is the right end in FIG.
- a rod 2 that is movably inserted into the cylinder 1 is slidably inserted into the rod guide 6.
- the rod 2 has one end protruding outside the cylinder 2, and the other end in the cylinder 2 is connected to a piston 8 that is also slidably inserted into the cylinder 2.
- the outer periphery of the rod 2 is sealed by a seal member 10 attached to the right end of the rod guide 6 in FIG. 1, and the inside of the cylinder 2 is maintained in a sealed state.
- the cylinder 1 is divided into an extension side chamber R1 on the right side in FIG. 1 and a compression side chamber R2 on the left side in FIG. 1 by a piston 8 slidably inserted inward.
- the extension side chamber R1 and the pressure side chamber R2 are filled with a liquid such as hydraulic oil.
- a liquid other than hydraulic oil such as water or an aqueous solution.
- the piston 8 is provided with a piston passage 11 that communicates the compression side chamber R2 and the extension side chamber R1 and includes a check valve 11a in the middle.
- the check valve 11a allows only the flow of hydraulic oil from the pressure side chamber R2 toward the extension side chamber R1, and the piston passage 11 is set as a one-way passage.
- the valve case 9 closes the end of the cylinder 1, communicates the through hole 9 a provided in the center, the tank T and the pressure side chamber R 2, and includes a check valve 12 a in the middle.
- a passage 12 is provided.
- a shaft portion 9 b extending in the axial direction is provided at the center of the left end of the valve case 9, and the through hole 9 a opens from the tip of the shaft portion 9 b and communicates with the right end of the valve case 9.
- the suction passage 12 leads from the position at the left end of the valve case 9 to avoid the shaft portion 9b to the right end.
- the check valve 12a allows only the flow of hydraulic oil from the tank T toward the pressure side chamber R2, and the suction passage 12 is set as a one-way passage.
- the bottom cap 4 is attached to one end, which is the left end in FIG. 1, of the outer cylinder 3 by welding, and closes one end of the outer cylinder 3.
- the bottom cap 4 has a bracket 4a that can be connected to the other of the railcar carriage W and the vehicle body B provided at the left end in FIG. 1, and a cylindrical fitting that is provided at the right end in FIG. A joint 4b, a recess 4c in which the left end of the cylinder 1 and the valve case 9 are fitted, and a fitting hole which is the right end in FIG. 1 and which opens to the outer peripheral side of the recess 4c and into which the pipe 7 can be inserted. 4d.
- first and second circuit blocks 22 and 23 having a hydraulic circuit C are connected to the side of the bottom cap 4, and the cylinder 1 and the tank T are hydraulically connected to the bottom cap 4.
- Communication passages 4e, 4f, 4g, 4h, 4i communicating with the circuit C are provided.
- the concave portion 4c includes a large diameter portion 4c1 having an inner diameter larger than the outer diameter of the valve case 9 and the cylinder 1, a middle diameter portion 4c2 connected to the left end of the large diameter portion 4c1, and an inner diameter smaller than the large diameter portion 4c1.
- a small-diameter portion 4c3 that is continuous with the left end of the medium-diameter portion 4c1 and has an inner diameter smaller than that of the medium-diameter portion 4c2.
- the shaft portion 9b of the valve case 9 is inserted into the small diameter portion 4c3, and the cylinder 1 and the valve case 9 are positioned in the radial direction. It has come to be.
- the medium diameter portion 4c2 is smaller in diameter than the outer diameter of the valve case 9.
- An annular gap leading to the tank T is formed between the large diameter portion 4c1 and the cylinder 1 and the valve case 9, and this annular gap is provided at a step portion between the large diameter portion 4c1 and the medium diameter portion 4c2.
- the gap is communicated with the gap 4c4.
- This gap faces a suction passage 12 provided in the valve case 9, and the suction passage 12 is communicated with the tank T through an annular gap and a gap, and communication between the pressure side chamber R ⁇ b> 2 and the tank T is ensured.
- the tank T is filled with gas in addition to hydraulic oil. It is not particularly necessary to compress and fill the inside of the tank T to make it pressurized.
- the communication passages 4e and 4f are both opened from the side of the bottom cap 4 and communicated with the pipe 7 through the fitting holes 4d.
- the communication passage 4g opens from the side of the bottom cap 4 and communicates with the small diameter portion 4c3.
- the valve case 9 includes a shaft portion 9b inserted into the small diameter portion 4c3, and a through hole 9a opens from the shaft portion 9b and communicates with the pressure side chamber R2. Therefore, the communication passage 4g communicates with the pressure side chamber R2 through the small diameter portion 4c3 and the through hole 9a.
- the communication passages 4h and 4i are also opened from the side of the bottom cap 4 and communicated with the tank T.
- a head cap 5 is attached to the other end of the outer cylinder 3 which is the right end in FIG. 1 by welding.
- the head cap 5 is annular, has a flange portion 5a having an outer diameter larger than the outer diameter of the outer tube 3, and extends from the inner periphery of the left end of the flange portion 5a toward the outer tube 3 side.
- a fitting portion 5b to be fitted and a plurality of screw holes 5c opened from the right end of the flange portion 5a are provided.
- the rod guide 6 includes a pipe holding member 13 that is bolted to the head cap 5 and a guide member 14 that is bolted to the pipe holding member 13 and integrated.
- the pipe holding member 13 has a thick cylindrical shape, a pipe holding cylinder 13a fitted to the inner circumference of the head cap 5, a flange 13b provided on the outer circumference of the pipe holding cylinder 13a, and a pipe holding cylinder 13a.
- 1 opens from the tank side end that is the left end in FIG. 1 and opens from the side end opposite to the tank T that is the right end in FIG. 1 of the pipe holding cylinder 13a.
- a through hole 13d that communicates with the fitting hole 13c with the same axis line, and a cylinder pressing portion 13e that is formed on the inner periphery of the pipe holding cylinder 13a and has a stepped portion with a small diameter on the cylinder side. ing.
- the flange 13b is provided with bolt insertion holes 13f of the same number as the screw holes 5c provided in the head cap 5.
- the pipe holding cylinder 13a is inserted into the head cap 5, and the flange 13b is inserted into the head cap 5.
- each bolt insertion hole 13f faces each screw hole 5c. In this state, when the bolt 15 is screwed into the screw hole 5c through the bolt insertion hole 13f, the pipe holding member 13 is bolted to the head cap 5 and integrated.
- the inner and outer diameters of the cylinder pressing portion 13e of the pipe holding member 13 are equal to the inner and outer diameters of the cylinder 1, and when the pipe holding member 13 is bolted to the head cap 5, the cylinder pressing portion 13e becomes the cylinder 1 shown in FIG. It comes into contact with the other end which is the middle right end. Since one end of the cylinder 1 is supported by the bottom cap 4 as described above, the cylinder 1 is sandwiched between the pipe holding member 13 and the bottom cap 4. When the pipe holding member 13 is tightened to the head cap 5 with the bolt 15, the cylinder 1 is pressed toward the bottom cap 4 by the cylinder pressing portion 13 e, and an axial force can be applied to the cylinder 1.
- the pipe 7 is bridged between the pipe holding member 13 and the bottom cap 4. Specifically, one end of the pipe 7 which is the left end in FIG. 1 is inserted into the fitting hole 4d of the bottom cap 4 and fitted, and the other end of the pipe 7 which is the right end in FIG. When inserted and fitted into the fitting hole 13c, the pipe 7 is supported by the pipe holding member 13 and the bottom cap 4 and attached to them without application of axial force.
- the pipe 7 is fitted into the pipe body 7a and both ends of the pipe body 7a, and has a cylindrical shape in which the tips are formed with small diameters and the tips are fitted into the fitting holes 4d and 13c. Sockets 7b and 7c.
- Each of the sockets 7b and 7c includes a seal ring that is in close contact with the outer periphery of the pipe body 7a provided on the inner periphery, and a seal ring that is in close contact with the inner walls of the fitting holes 4d and 13c provided on the outer periphery.
- the passage formed in 7 is kept liquid tight and isolated from the tank T.
- the pipe 7 is comprised by three components, the pipe main body 7a and socket 7b, 7c, you may be comprised by a single component.
- the sockets 7b and 7c have small diameters at the tips, and are provided with stepped portions on the outer periphery.
- the sockets 7b and 7c have a large diameter only on the inner circumference where only the pipe body 7a is inserted to form a stepped portion. Therefore, even if the pipe 7 moves in the axial direction with respect to the pipe holding member 13 and the bottom cap 4, the sockets 7b and 7c do not come out of the fitting holes 4d and 13c, and the pipe body 7a is not with respect to the sockets 7b and 7c. Therefore, it does not come out even if it moves in the axial direction. Providing the sockets 7b and 7c in this way can prevent the pipe 7 from dropping from the fitting hole 13c of the pipe holding member 13 and the fitting hole 4d of the bottom cap 4.
- the pipe 7 When the pipe 7 is constituted by a single part, it is only necessary to provide both ends of the pipe 7 with a small diameter and provide stepped portions. However, since the entire outer diameter of the pipe 7 is increased, the weight of the actuator A is increased. In order to avoid this, wasteful meat may be dropped by cutting or the like in the middle of the pipe 7, but this increases the processing cost and the material yield. In the case where the sockets 7b and 7c are provided, there is an advantage that such a disadvantage does not occur, but the pipe 7 composed of a single part is not denied.
- the guide member 14 is an annular main body 14a that is bolted to the pipe holding cylinder 13a of the pipe holding member 13, and is inserted into the pipe holding member 13 at the left end of the main body 14a in FIG.
- a socket 14b that fits on the inner periphery and positions the cylinder 1 in the radial direction is provided, and an annular bush 16 that supports the outer periphery of the rod 2 that is mounted from the socket 14b to the inner periphery of the main body 14a.
- annular protrusion 14d is provided at the right end of the main body portion 14a in FIG. 1, and a sealing member 10 that slides on the outer periphery of the rod 2 and seals the outer periphery of the rod 2 is mounted in the annular protrusion 14d.
- a seal holding member 18 that holds an outer seal 17 that slides in contact with the outer periphery of the rod 2 and seals the outer periphery of the rod 2 is laminated on the main body portion 14a.
- the seal holding member 18 is bolted to the pipe holding member 13 together with the guide member 14 by a bolt 19.
- the outer diameter of the main body 14a is designed to be equal to or less than the outer diameter of the pipe holding cylinder 13a so as not to interfere with the tightening operation of the bolt 15 inserted through the flange 13b of the pipe holding member 13.
- the socket 14b has an outer diameter that can be fitted into the pipe holding cylinder 13a and the cylinder 1 of the pipe holding member 13.
- the socket 14b When the socket 14b is fitted into the cylinder 1, the right end of the cylinder 1 in FIG. Positioning. Since the cylinder 1 is positioned in the radial direction in this way, the axial center of the cylinder 1 is not displaced when an axial force is applied to the cylinder 1 by the pipe holding member 13.
- a cylindrical bush 16 is mounted from the inner periphery of the socket 14b to the inner periphery of the main body 14a. Since the socket 14b is provided in this manner, in addition to the radial positioning function of the cylinder 1, the axial length of the main body 14a can be shortened, and the overall length of the actuator A excluding the rod 2 can be shortened.
- a notch 14e is provided in a part of the outer periphery of the socket 14b so as to communicate with an annular groove 13h provided in the inner periphery of the pipe holding member 13 through a groove 13g provided in the cylinder pressing portion 13e. It has become.
- the annular groove 13h communicates with a fitting hole 13c into which the pipe 7 is fitted. Therefore, the inside of the pipe 7 communicates with the extension side chamber R1 via the annular groove 13h, the groove 13g, and the notch 14e. Further, one end side of the pipe 7 is communicated with a hydraulic circuit C provided inside the circuit blocks 22 and 23 via communication passages 4 e and 4 f provided in the bottom cap 4.
- the through hole 13d communicating with the fitting portion 13c is covered with the main body portion 14a.
- 13 d of through-holes are provided in order to make the operation
- a rod that can be inserted into the through hole 13d is sufficiently longer than the pipe 7 in the pipe 7, and the rod is inserted into the through hole 13d so as to be stacked on the pipe holding member 13 on the head cap 5. .
- the pipe holding member 13 cannot be visually recognized.
- the rod is inserted into the through hole 13d, the pipe 7 can be fitted into the fitting hole 13c, and the assembling work is facilitated. .
- the rod may be pulled out after assembling the pipe holding member 13 to the head cap 5.
- a plug 20 is inserted into the through hole 13d after the rod is pulled out, so that the pipe 7 is kept liquid-tight. Since the through hole 13d is closed by the guide member 14, the plug 20 is removed. Is prevented.
- the guide member 14 has an outer diameter smaller than the outer diameter of the pipe holding member 13, and forms a small diameter portion in the rod guide 6.
- the pipe holding member 13 forms a large diameter portion in the rod guide 6. Yes.
- the rod guide 6 is composed of two parts, that is, the pipe holding member 13 and the guide member 14, but may be formed as a single part by integrally forming them.
- the pipe holding member 13 has a function of adding an axial force to the cylinder 1, and thus is preferably made of an iron-based material. Strength is not required. Therefore, the guide member 14 can be made of a light material, for example, aluminum, and the rod guide 6 is composed of two parts, that is, the pipe holding member 13 and the guide member 14. It is lighter than when manufactured.
- the dust boot 21 is attached.
- the dust boot 21 covers the outer periphery of the rod 2 and protects the sliding surface of the rod 2 to the rod guide 6.
- the first circuit block 22 has one end connected to the communication passage 4e and the other end connected to the communication passage 4g, a first opening / closing valve 25 provided in the middle of the passage 24, and one end connected to the passage 24.
- the passage 26 communicating with the communication passage 4h between the first opening / closing valve 25 and the communication passage 4g, the second opening / closing valve 27 provided in the middle of the passage 26, and the passage 26 branched from the passage 24.
- a variable relief valve 29 provided in the passage 28.
- passage 24 communicates with the inside of the pipe 7 through the communication passage 4e, and further communicates with the extension side chamber R1.
- the other end of the passage 24 communicates with the pressure side chamber R2 through the communication passage 4g. Therefore, the passage 24 and the communication passages 4e and 4g constitute a first bypass passage Bp1 that communicates with the compression side chamber R2 and communicates with the expansion side chamber R2 via the pipe 7.
- passage 26 One end of the passage 26 communicates with the pressure side chamber R2 through the communication passage 4g, and the other end communicates with the tank T through the communication passage 4h. Therefore, the passage 26 and the communication passages 4g and 4h constitute a second bypass passage Bp2 that connects the pressure side chamber R2 and the tank T.
- the passage 28 communicates with the extension side chamber R1 through the communication passage 4e and the pipe 7, and also communicates with the tank T through the communication passage 4h. Therefore, the passage 28 and the communication passages 4e and 4h constitute a discharge passage Ep that is communicated with the tank T and communicated with the expansion side chamber R2 via the pipe 7.
- the first on-off valve 25 is an electromagnetic on-off valve.
- the first on-off valve 25 opens the first bypass passage Bp1, and connects the extension side chamber R1 and the compression side chamber R2, and the extension side chamber R1.
- a valve 25a having a blocking position for blocking communication with the compression side chamber R2, a spring 25b for energizing the valve to take the blocking position, and a solenoid for switching the valve 25a to the communication position against the spring 25b when energized 25c.
- the second on-off valve 27 is an electromagnetic on-off valve.
- the second on-off valve 27 opens the second bypass passage Bp2 to communicate the pressure side chamber R2 and the tank T, and the pressure side chamber R2 and the tank.
- a valve 27a having a blocking position for blocking communication with T, a spring 27b for energizing the valve 27a to take the blocking position, and a solenoid 27c for switching the valve 27a to the communication position against the spring 27b when energized. And is configured.
- variable relief valve 29 is a proportional electromagnetic relief valve, and a valve body 29a provided in the middle of the discharge passage Ep and a spring that biases the valve body 29a so as to block the discharge passage Ep. 29b and a proportional solenoid 29c that generates a thrust against the spring 29b when energized, and the valve opening pressure can be adjusted by adjusting the amount of current flowing through the proportional solenoid 29c.
- variable relief valve 29 pushes the valve body 29a in a direction to open the discharge passage Ep when the pressure in the extension side chamber R1 upstream of the discharge passage Ep to be applied to the valve body 29a exceeds the relief pressure (valve opening pressure).
- the resultant force of the thrust due to the pressure and the thrust by the proportional solenoid 29c overcomes the urging force of the spring 29b that urges the valve body 29a in the direction of blocking the discharge passage Ep, and retracts the valve body 29a to discharge the discharge passage. Ep is released.
- the variable relief valve 29 is always kept in a closed state to block the flow of hydraulic oil in the direction from the tank T side toward the extension side chamber R1.
- variable relief valve 29 when the amount of current supplied to the proportional solenoid 29c is increased, the thrust generated by the proportional solenoid 29c can be increased, and when the amount of current supplied to the proportional solenoid 29c is maximized, the valve is opened. On the contrary, the valve opening pressure becomes maximum when no current is supplied to the proportional solenoid 29c.
- the second circuit block 23 includes a passage 30 having one end connected to the communication passage 4f and the other end connected to the communication passage 4i, and a check valve 31 and a pump 32 provided in the middle of the passage 30. I have.
- passage 30 communicates with the inside of the pipe 7 through the communication passage 4f, and further communicates with the extension side chamber R1.
- the other end of the passage 30 communicates with the tank T through the communication passage 4i. Therefore, the passage 30 and the communication passages 4f and 4i constitute a hydraulic pressure supply passage Sp that is communicated with the tank T and communicated with the expansion side chamber R1 via the pipe 7.
- the pump 32 is driven by a motor M attached to the second circuit block 23.
- the pump 32 is a pump that discharges hydraulic oil in only one direction.
- the discharge port is communicated with the expansion side chamber R1 through the hydraulic pressure supply passage Sp, and the suction port is driven by the motor M through the tank T. Then, the hydraulic oil is sucked from the tank T and is supplied to the extension side chamber R1.
- the pump 32 only discharges hydraulic oil in one direction and does not switch the rotation direction. Therefore, there is no problem that the discharge amount changes at the time of rotation switching, and an inexpensive gear pump or the like can be used. . Further, since the rotation direction of the pump 32 is always the same direction, even in the motor M that is a driving source for driving the pump 32, high responsiveness to rotation switching is not required, and the motor M is also inexpensive. Can be used.
- a check valve 31 for preventing the backflow of hydraulic oil from the extension side chamber R1 to the pump 32 is provided in the middle of the passage 30 constituting a part of the hydraulic pressure supply passage Sp. Since the check valve 31 is provided, the backflow of hydraulic oil to the pump 32 is prevented, and the actuator A is not restricted by the maximum torque of the motor M when exerting a force in the direction opposite to the operation direction. Can demonstrate great power.
- the actuator A configured as described above, when the first on-off valve 25 is in the communication position and the second on-off valve 27 is in the shut-off position while supplying a predetermined discharge flow rate from the pump 32 to the expansion side chamber R1, the extension side chamber R1 and the pressure side chamber R2 are in communication with each other, and hydraulic oil is supplied from the pump 32 to both.
- the total volume of the extension side chamber R1 and the compression side chamber R2 increases, and the rod 2 is pushed out from the cylinder 1 to the right in FIG.
- the variable relief valve 29 opens and the hydraulic oil is discharged to the tank T through the discharge passage Ep.
- the pressure in the extension side chamber R1 and the pressure side chamber R2 is controlled by the valve opening pressure of the variable relief valve 29 determined by the amount of current applied to the variable relief valve 29.
- the actuator A is equal to a value obtained by multiplying the pressure receiving area difference between the pressure side chamber R2 side and the extension side chamber R1 side in the piston 8 by the pressures in the extension side chamber R1 and the pressure side chamber R2 controlled by the variable relief valve 29 described above. Demonstrate thrust in the extension direction.
- first on-off valve 25 is set to the shut-off position and the second on-off valve 27 is set to the communication position while supplying a predetermined discharge flow rate from the pump 32 to the extension side chamber R1
- hydraulic oil is supplied only to the extension side chamber R1.
- the hydraulic oil is discharged to the tank T through the second on-off valve 27.
- the piston 8 is pushed leftward in FIG. 1, and the actuator A exhibits a contraction operation.
- the pressure in the compression side chamber R2 becomes constant as the tank pressure, and the pressure in the expansion side chamber R1 is controlled by the valve opening pressure of the variable relief valve 29.
- the actuator A causes the pressure receiving area of the piston 8 on the extension side chamber R1 side and the pressure in the extension side chamber R1 controlled by the variable relief valve 29 to be adjusted. Delivers thrust in the direction of contraction equal to the multiplied value.
- variable relief valve 29 When the variable relief valve 29 is not provided, when the expansion operation is performed, the first on-off valve 25 is opened and the second on-off valve 27 is opened and closed to adjust the pressure in the expansion side chamber R1, and conversely the contraction operation is performed. If the pressure in the rod side chamber 5 is adjusted by opening and closing the first on-off valve 25 while opening the second on-off valve 27, the thrust generated by the actuator A can be adjusted. On the other hand, when the discharge passage Ep and the variable relief valve 29 are provided, when the actuator A is expanded and contracted, the pressure in the expansion side chamber R1 is adjusted to the valve opening pressure of the variable relief valve 29, and the pressure in the expansion side chamber R1. Can be easily controlled by adjusting the valve opening pressure of the variable relief valve 29.
- the discharge passage Ep and the variable relief valve 29 are provided in this way, sensors necessary for adjusting the thrust force of the actuator A become unnecessary. Furthermore, since the pressure in the expansion side chamber R1 may be controlled by the variable relief valve 29, the motor M only needs to drive the pump 32 at a constant rotational speed, and the motor M is highly advanced for adjusting the discharge flow rate of the pump 32. No need to control. Furthermore, the first on-off valve 25 and the second on-off valve 27 are opened and closed at high speed to control the thrust of the actuator A, or the first on-off valve 25 and the second on-off valve 27 are thrust as variable relief valves with an opening / closing function. There is no need to control. Therefore, the actuator A as a hydraulic device is inexpensive, and a robust system can be constructed in terms of hardware and software.
- the cross-sectional area of the rod 2 is halved of the cross-sectional area of the piston 8, and the pressure receiving area on the expansion side chamber R1 side of the piston 8 is half of the pressure receiving area on the pressure side chamber R2 side.
- the amount of hydraulic oil relative to the amount of displacement of the actuator A during the expansion operation and during the contraction operation is the same on both sides of the expansion and contraction. Therefore, if the valve opening pressure of the variable relief valve 29 is the same in both the expansion operation and the contraction operation and the pressure in the expansion side chamber R1 is the same, the thrust generated in both expansion and contraction becomes equal.
- the actuator A when the actuator A is extended, the pressure in the extension side chamber R1 and the pressure side chamber R2 are equalized because the extension side chamber R1 and the pressure side chamber R2 are communicated. A thrust is generated by multiplying the pressure receiving area difference on the pressure side chamber R2 side by the pressure.
- the actuator A when the actuator A is contracted, the expansion side chamber R1 and the pressure side chamber R2 are disconnected from each other and the pressure side chamber R2 is connected to the tank T. Thrust is generated by multiplying the pressure receiving area on the extension side chamber R1 side.
- the thrust generated by the actuator A is a value obtained by multiplying a half of the cross-sectional area of the piston 8 by the pressure of the extension side chamber R1 in both expansion and contraction.
- the pressure in the extension side chamber R1 may be controlled both during the extension operation and during the contraction operation.
- the pressure receiving area on the expansion side chamber R1 side of the piston 8 is set to one-half of the pressure receiving area on the compression side chamber R2, and when the same thrust is generated on both expansion and contraction sides, the pressure in the expansion side chamber R1 on the expansion side and contraction side is Since they are the same, the control is simplified, and in addition, the amount of hydraulic oil relative to the amount of displacement is the same, so there is an advantage that the responsiveness is the same on both sides of expansion and contraction.
- variable relief valve 29 acts as a resistance against the flow of hydraulic oil and functions as a pressure control valve for adjusting the pressure in the cylinder 1 to the valve opening pressure
- the actuator A functions as a passive uniflow type damper. It can. Further, at the time of failure in which energization of each device of the actuator A becomes impossible, the valves 25a and 27a of the first on-off valve 25 and the second on-off valve 27 are pressed by the springs 25b and 27b, respectively, and take off positions. . Since the variable relief valve 29 functions as a pressure control valve with the valve opening pressure fixed at a maximum, the actuator A automatically functions as a passive damper.
- this actuator A not only functions as an actuator but also functions as a damper regardless of the driving state of the motor M, and does not involve troublesome and steep valve switching operations.
- a highly reliable system can be provided.
- this actuator A is set to a single rod type, it is easier to secure a stroke length than the double rod type actuator, and the total length of the actuator is shortened, so that it can be mounted on a railway vehicle. Will improve.
- the flow of hydraulic oil from the pump 32 and the expansion / contraction operation in the actuator A passes through the expansion side chamber R1 and the pressure side chamber R2 in order and finally returns to the tank T. Even if gas is mixed in the side chamber R1 or the pressure side chamber R2, the actuator A is automatically discharged to the tank T by the expansion / contraction operation. Therefore, in this actuator A, it is possible to prevent the deterioration of the responsiveness of the propulsion force generation.
- variable relief valve 29 can be easily controlled by using a proportional electromagnetic relief valve that can change the valve opening pressure proportionally with the amount of current applied.
- variable relief valve 29 can be any relief valve that can adjust the valve opening pressure. It is not limited to a proportional electromagnetic relief valve.
- the piston passage 11 can be integrated into the first bypass passage Bp1 with the shut-off position of the first on-off valve 25 as a check valve, and the suction passage 12 also has the shut-off position of the second on-off valve 27 as a check valve.
- Bypass passage Bp2 can be consolidated.
- the actuator A as the hydraulic device of the present invention is configured as described above.
- the bottom cap 4 and the head cap 5 that are respectively welded to the outer cylinder 3 and the rod guide 6 that is fastened to the head cap 5 are provided, and one end of the pipe 7 is connected to the bottom cap. 4, and the other end of the pipe 7 is fitted to the rod guide 6, and the cylinder 1 is sandwiched between the bottom cap 4 and the rod guide 6. Therefore, an axial force can be applied to the cylinder 1 while supporting the pipe 7 that is isolated from the tank T by the bottom cap 4 and the rod guide 6.
- the hydraulic device according to the present invention it is not necessary to braze the pipe 7 to the bottom cap 5, so that contamination does not occur and the assembling work becomes very simple, and the hydraulic device is defective. There is no worry of becoming. Furthermore, in the hydraulic device according to the present invention, since an axial force is applied to the cylinder 1, there is no dead zone in which a damping force and a thrust during expansion and contraction cannot be generated. As described above, according to the hydraulic device of the present invention, there is no dead zone in the generation of force and no contamination occurs.
- the rod guide 6 is bolted to the head cap 5 so as to come into contact with the end of the cylinder 1 and the other end of the pipe 7 is fitted.
- a guide member 14 that is bolted to the pipe holding member 13 and has an outer diameter smaller than that of the pipe holding member 13 and supports the outer circumference of the rod 2 on the inner circumference. Therefore, the guide member 14 that is not required to be as strong as the pipe holding member 13 that applies axial force to the cylinder 1 can be manufactured with a light material, and the hydraulic device can be reduced in weight.
- the guide member 14 is inserted into the pipe holding member 13 provided at the end of the annular main body portion 14a and the main body portion 14a that are bolted to the pipe holding member 13.
- a socket 14b that fits on the inner periphery of the cylinder 1 and positions the cylinder 1 in the radial direction, and an annular bush 16 that is mounted from the socket 14b to the inner periphery of the main body 14a and supports the outer periphery of the rod 2 are provided.
- the axial length of the main body 14 a can be shortened, and the total length of the hydraulic device excluding the rod 2 can be shortened.
- the pipe holding member 13 is opened from the tank T side end and the fitting hole 13c into which the other end of the pipe 7 is fitted, and the pipe T is opened from the side end opposite to the tank T. And a through hole 13d communicating with the fitting hole 13c. Therefore, when the pipe holding member 13 is assembled to the head cap 5, a rod longer than the pipe 7 is inserted into the pipe 7, and the rod is inserted into the through hole 13 d, so that the head cap of the pipe holding member 13 is inserted. Easily assembled to 5. The rod may be pulled out and removed after the pipe holding member 13 is assembled to the head cap 5.
- the plug 20 is inserted into the through hole 13d, and the guide hole 14 closes the through hole 13d when the guide member 14 is fastened to the pipe holding member 13. Can be kept liquid-tight and the stopper 20 is prevented from falling off.
- the hydraulic device of the present embodiment includes a dust boot 21 that spans the tip of the rod 2 and the guide member 14 and covers the outer periphery of the rod 2.
- the dust boot 21 is attached to a guide member 14 that forms a small diameter portion of the rod guide 6. Therefore, even in a hydraulic device such as the actuator A provided with the first circuit block 22 that holds the solenoids 25c, 27c, and 29c and the second circuit block 23 that holds the large motor M in the vicinity of the outer cylinder 3,
- the dust boot 21 does not interfere with the solenoids 25c, 27c, 29c and the motor M. Therefore, the motor M and the solenoids 25c, 27c, 29c can be disposed in the vicinity of the outer cylinder 3, and the hydraulic device can be downsized.
- the hydraulic device includes a piston 8 that is movably inserted into the cylinder 1 and divides the cylinder 1 into an extension side chamber R1 and a pressure side chamber R2.
- a piston 8 that is movably inserted into the cylinder 1 and divides the cylinder 1 into an extension side chamber R1 and a pressure side chamber R2.
- the hydraulic circuit C connected to the bottom cap 4 via the bottom cap 4. Since heavy objects such as the first circuit block 22 and the second circuit block 23 in which the hydraulic circuit C is provided are supported by the bottom cap 4, an excessive load is applied to the rod guide 6 that pivotally supports the rod 2. Smooth expansion and contraction operation is guaranteed.
- a piston passage 11 provided on the piston 8 that allows only the passage of liquid from the pressure side chamber R2 to the extension side chamber R1, and one end of the cylinder 1 are closed and a tank.
- a valve case 9 having a suction passage 12 that allows only the passage of liquid from T to the pressure side chamber R2, and the hydraulic circuit C communicates with the pressure side chamber R2 and communicates with the expansion side chamber R1 through the pipe 7.
- First bypass passage Bp1, first on-off valve 25 provided in the middle of the first bypass passage Bp1, second bypass passage Bp2 that communicates the pressure side chamber R2 and the tank T, and in the middle of the second bypass passage Bp2.
- the hydraulic device can function as both the actuator A and the passive damper. Further, in this case, the hydraulic device can function not only as an actuator but also as a passive damper by only opening and closing the first on-off valve 25 and the second on-off valve 27, accompanied by troublesome and steep valve switching operations. Therefore, a system with high responsiveness and reliability can be provided.
- the hydraulic oil supplied from the pump 32 and the flow of the hydraulic oil by the expansion / contraction operation in this hydraulic device passes through the expansion side chamber R1 and the pressure side chamber R2 in order and finally returns to the tank T.
- the expansion side chamber R1 or the pressure side chamber Even if gas is mixed in R2, it is discharged to the tank T independently by the expansion / contraction operation of the actuator A. Therefore, in the actuator A, it is possible to prevent the deterioration of the response of the generation of the propulsive force.
- the hydraulic circuit C further includes a discharge passage Ep that connects the expansion side chamber R1 communicated via the pipe 7 to the tank T, and a middle portion of the discharge passage Ep. And a variable relief valve 29 provided and capable of changing the valve opening pressure. Therefore, when the actuator A as the hydraulic device is expanded and contracted, the pressure in the expansion side chamber R1 is adjusted to the valve opening pressure of the variable relief valve 29, and the pressure in the expansion side chamber R1 is the valve opening pressure of the variable relief valve 29. Adjustment makes thrust control easier. If the discharge passage Ep and the variable relief valve 29 are thus provided, the thrust of the actuator A can be controlled without a sensor.
- the motor M since the pressure in the expansion side chamber R1 may be controlled by the variable relief valve 29, the motor M only needs to drive the pump 32 at a constant rotational speed, and the motor M is highly advanced for adjusting the discharge flow rate of the pump 32. No need to control. Furthermore, the first on-off valve 25 and the second on-off valve 27 are opened and closed at high speed to control the thrust of the actuator A, or the first on-off valve 25 and the second on-off valve 27 are thrust as variable relief valves with an opening / closing function. There is no need to control. Therefore, the actuator A as a hydraulic device is inexpensive, and a robust system can be constructed in terms of hardware and software.
- the hydraulic device of the present invention has been described using the example in which the hydraulic device of the present invention is embodied in the actuator A.
- the present invention can be applied to a hydraulic device that employs a structure in which a pipe is accommodated in a tank. Therefore, the present invention is applicable to, for example, a hydraulic device such as a uniflow damper or a damper used for semi-active control in addition to an actuator.
- a hydraulic device such as a uniflow damper or a damper used for semi-active control in addition to an actuator.
- it can be used for various purposes such as building, machine vibration suppression, vehicle vibration suppression and the like.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Actuator (AREA)
- Fluid-Damping Devices (AREA)
Abstract
Description
Claims (9)
- シリンダと、
前記シリンダ内に移動自在に挿入されるロッドと、
内部に前記シリンダを収容する外筒と、
前記シリンダと前記外筒との間に形成されるタンクと、
前記外筒の一端に結合されるボトムキャップと、
前記外筒の他端に結合される環状のヘッドキャップと、
環状であって前記ヘッドキャップに締結されるとともに内側に挿通される前記ロッドの移動を案内するロッドガイドと、
前記タンク内に収容されるとともに前記ボトムキャップと前記ロッドガイドとで挟持されて前記リザーバとは隔絶される通路を形成するパイプとを備え、
前記ボトムキャップと前記ロッドガイドで前記シリンダを挟持するともに、
前記パイプの一端を前記ボトムキャップに嵌合させるとともに前記パイプの他端を前記ロッドガイドに嵌合させた
ことを特徴とする液圧機器。 - 前記ロッドガイドは、
前記ヘッドキャップにボルト締結されて、前記シリンダの端部に当接するとともに前記パイプの他端が嵌合される環状のパイプ保持部材と、
前記パイプ保持部材にボルト締結されて、外径が前記パイプ保持部材よりも小径な環状であって内周で前記ロッドの外周を支持するガイド部材と
を備えたことを特徴とする請求項1に記載の液圧機器。 - 前記ガイド部材は、
前記パイプ保持部材にボルト締結される環状の本体部と、
前記本体部の端部に設けられ前記パイプ保持部材内に挿入されるとともに前記シリンダの内周に嵌合して前記シリンダを径方向へ位置決めるソケットと、
前記ソケットから前記本体部の内周にかけて装着されて前記ロッドの外周を支持する環状のブッシュと
を備えたことを特徴とする請求項2に記載の液圧緩衝器。 - 前記パイプ保持部材に、
前記タンク側端から開口して前記パイプの他端が嵌合される嵌合孔と、
前記タンクとは反対の側端から開口して前記嵌合孔に通じる通孔とを設けた
ことを特徴とする請求項2または3に記載の液圧機器。 - 前記パイプ保持部材に設けられた通孔に挿入される栓を設け、
前記ガイド部材は、前記パイプ保持部材に締結されると前記通孔を閉塞する
ことを特徴とする請求項4に記載の液圧機器。 - 前記ロッドの先端と前記ガイド部材に架け渡されて前記ロッドの外周を覆うダストブーツを備えた
ことを特徴とする請求項2または3に記載の液圧機器。 - 前記シリンダ内に移動自在に挿入されて前記シリンダ内を伸側室と圧側室とに区画するピストンを備え、
前記パイプは、前記ロッドガイドを介して伸側室に連通されるとともに、前記ボトムキャップを介してボトムキャップに連結される液圧回路に連通される
ことを特徴とする請求項1から3のいずれか一項に記載の液圧機器。 - 前記ピストンに設けられて前記圧側室から前記伸側室への液体の通過のみを許容するピストン通路と、
前記シリンダの一端を閉塞するとともに前記タンクから前記圧側室への液体の通過のみを許容する吸込通路を有するバルブケースとを備え、
前記液圧回路は、
前記圧側室に連通されるとともに前記パイプを介して前記伸側室に連通される第一バイパス路と、
前記第一バイパス路の途中に設けた第一開閉弁と、
前記圧側室と前記タンクとを連通する第二バイパス路と、
前記第二バイパス路の途中に設けた第二開閉弁と、
前記タンクから前記パイプを介して前記伸側室へ液体を供給するポンプとを備えた
ことを特徴とする請求項7に記載の液圧機器。 - 前記液圧回路は、さらに、
前記パイプを介して連通される前記伸側室を前記タンクへ接続する排出通路と、
前記排出通路の途中に設けられて開弁圧を変更可能な可変リリーフ弁とを備えた
ことを特徴とする請求項8に記載の液圧機器。
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201580047892.3A CN107076243B (zh) | 2014-10-24 | 2015-10-22 | 液压设备 |
| EP15853442.0A EP3211263A4 (en) | 2014-10-24 | 2015-10-22 | Hydraulic device |
| CA2963221A CA2963221A1 (en) | 2014-10-24 | 2015-10-22 | Liquid pressure device |
| US15/514,327 US10184540B2 (en) | 2014-10-24 | 2015-10-22 | Liquid pressure device |
| KR1020177006944A KR20170041902A (ko) | 2014-10-24 | 2015-10-22 | 액압 기기 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014216895A JP6313693B2 (ja) | 2014-10-24 | 2014-10-24 | 液圧機器 |
| JP2014-216895 | 2014-10-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2016063944A1 true WO2016063944A1 (ja) | 2016-04-28 |
Family
ID=55760974
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2015/079822 Ceased WO2016063944A1 (ja) | 2014-10-24 | 2015-10-22 | 液圧機器 |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US10184540B2 (ja) |
| EP (1) | EP3211263A4 (ja) |
| JP (1) | JP6313693B2 (ja) |
| KR (1) | KR20170041902A (ja) |
| CN (1) | CN107076243B (ja) |
| CA (1) | CA2963221A1 (ja) |
| WO (1) | WO2016063944A1 (ja) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3115620B1 (en) * | 2014-05-23 | 2018-10-03 | KYB Corporation | Cylinder device |
| DE102016114635B4 (de) * | 2016-08-08 | 2018-09-20 | Hoerbiger Automatisierungstechnik Holding Gmbh | Bearbeitungsmaschine |
| JP6817786B2 (ja) * | 2016-11-04 | 2021-01-20 | Kyb株式会社 | シリンダ装置 |
| JP2018071769A (ja) * | 2016-11-04 | 2018-05-10 | Kyb株式会社 | バルブブロック |
| JP2019034620A (ja) * | 2017-08-14 | 2019-03-07 | Kyb株式会社 | 鉄道車両用制振装置 |
| DE102017216922A1 (de) * | 2017-09-25 | 2019-03-28 | Zf Friedrichshafen Ag | Verstellbarer Schwingungsdämpfer |
| DE102017216919A1 (de) * | 2017-09-25 | 2019-03-28 | Zf Friedrichshafen Ag | Verstellbarer Schwingungsdämpfer |
| US10960098B2 (en) | 2018-07-03 | 2021-03-30 | Apogee Lighting Holdings, Llc | Multi-functional lighting fixture |
| DE102019108092B4 (de) * | 2019-03-28 | 2022-09-01 | Thyssenkrupp Ag | Schwingungsdämpfer, Kraftfahrzeug und Verfahren zur Montage eines Schwingungsdämpfers |
| DE102019206455B4 (de) | 2019-05-06 | 2024-11-14 | Zf Friedrichshafen Ag | Schwingungsdämpfer mit zwei verstellbaren Dämpfventileinrichtungen |
| JP7360355B2 (ja) * | 2020-04-09 | 2023-10-12 | Kyb株式会社 | シリンダ装置 |
| JP7393303B2 (ja) * | 2020-06-09 | 2023-12-06 | カヤバ株式会社 | シリンダ装置 |
| JP7141553B1 (ja) | 2021-06-08 | 2022-09-22 | Kyb株式会社 | シリンダ装置 |
| US11781611B2 (en) * | 2021-11-23 | 2023-10-10 | DRiV Automotive Inc. | Damper with compression damping force range increase |
| JP7352710B1 (ja) | 2022-10-17 | 2023-09-28 | Kyb株式会社 | シリンダ装置 |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0754899A (ja) * | 1993-08-16 | 1995-02-28 | Tokico Ltd | 減衰力調整式油圧緩衝器 |
| JPH09222147A (ja) * | 1996-02-16 | 1997-08-26 | Kayaba Ind Co Ltd | 車高調整装置 |
| JP2008025694A (ja) * | 2006-07-20 | 2008-02-07 | Kayaba Ind Co Ltd | 緩衝器 |
| JP2012026564A (ja) * | 2010-06-21 | 2012-02-09 | Showa Corp | 油圧緩衝器 |
| JP2012193824A (ja) * | 2011-03-18 | 2012-10-11 | Kyb Co Ltd | 複筒型液圧緩衝器 |
| JP2013001306A (ja) * | 2011-06-20 | 2013-01-07 | Kyb Co Ltd | 鉄道車両用制振装置 |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL163606C (nl) * | 1976-11-26 | 1980-09-15 | Itt | Blokkeerbare hydraulische schokdemper. |
| NL169216C (nl) * | 1977-12-12 | 1982-06-16 | Itt | Inrichting voor het verlagen van de druk op de zuigerstangpakking van een hydraulische telescopische schokdemper. |
| US4744444A (en) * | 1978-04-12 | 1988-05-17 | Craig L. Gillingham | Shock absorber |
| JPS5872744A (ja) | 1981-10-28 | 1983-04-30 | Kayaba Ind Co Ltd | 複筒型油圧緩衝器の減衰力調整装置 |
| JPH0434237A (ja) * | 1990-05-28 | 1992-02-05 | Kayaba Ind Co Ltd | 油圧緩衝器の減衰力調整装置 |
| US5558190A (en) * | 1995-10-06 | 1996-09-24 | Chang; John | Damping device adapted for use in exercise apparatus |
| US5618248A (en) * | 1996-08-20 | 1997-04-08 | Huang; Chen-Tan | Double-acting hydraulic cylinder for use in an exercising apparatus |
| US5799758A (en) * | 1996-08-20 | 1998-09-01 | Huang; Chen-Tan | Double-acting hydraulic cylinder for use in an exercising apparatus |
| US5924528A (en) * | 1997-02-21 | 1999-07-20 | Tenneco Automotive Inc. | Load depending damping assembly |
| JP3895491B2 (ja) | 1999-02-23 | 2007-03-22 | カヤバ工業株式会社 | 鉄道車両の横揺れ制振用ダンパ及び制振方法 |
| JP4726168B2 (ja) * | 2000-04-17 | 2011-07-20 | キヤノン株式会社 | 光学スケール及び光学式エンコーダ |
| NL1015989C2 (nl) * | 2000-08-22 | 2002-02-25 | Koni Bv | Rotatiedemper met afsluiter. |
| US6926128B2 (en) * | 2003-06-10 | 2005-08-09 | Arvin Technologies, Inc. | Adaptive shock damping control |
| JP6010310B2 (ja) * | 2012-03-05 | 2016-10-19 | Kyb株式会社 | ロータリダンパ |
| JP6034684B2 (ja) * | 2012-12-10 | 2016-11-30 | Kyb株式会社 | 緩衝器 |
-
2014
- 2014-10-24 JP JP2014216895A patent/JP6313693B2/ja active Active
-
2015
- 2015-10-22 CN CN201580047892.3A patent/CN107076243B/zh active Active
- 2015-10-22 WO PCT/JP2015/079822 patent/WO2016063944A1/ja not_active Ceased
- 2015-10-22 KR KR1020177006944A patent/KR20170041902A/ko not_active Abandoned
- 2015-10-22 EP EP15853442.0A patent/EP3211263A4/en not_active Withdrawn
- 2015-10-22 CA CA2963221A patent/CA2963221A1/en not_active Abandoned
- 2015-10-22 US US15/514,327 patent/US10184540B2/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0754899A (ja) * | 1993-08-16 | 1995-02-28 | Tokico Ltd | 減衰力調整式油圧緩衝器 |
| JPH09222147A (ja) * | 1996-02-16 | 1997-08-26 | Kayaba Ind Co Ltd | 車高調整装置 |
| JP2008025694A (ja) * | 2006-07-20 | 2008-02-07 | Kayaba Ind Co Ltd | 緩衝器 |
| JP2012026564A (ja) * | 2010-06-21 | 2012-02-09 | Showa Corp | 油圧緩衝器 |
| JP2012193824A (ja) * | 2011-03-18 | 2012-10-11 | Kyb Co Ltd | 複筒型液圧緩衝器 |
| JP2013001306A (ja) * | 2011-06-20 | 2013-01-07 | Kyb Co Ltd | 鉄道車両用制振装置 |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP3211263A4 * |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3211263A4 (en) | 2018-06-13 |
| JP6313693B2 (ja) | 2018-04-18 |
| JP2016084841A (ja) | 2016-05-19 |
| CN107076243A (zh) | 2017-08-18 |
| KR20170041902A (ko) | 2017-04-17 |
| CN107076243B (zh) | 2019-10-01 |
| EP3211263A1 (en) | 2017-08-30 |
| US20170276205A1 (en) | 2017-09-28 |
| CA2963221A1 (en) | 2016-04-28 |
| US10184540B2 (en) | 2019-01-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6313693B2 (ja) | 液圧機器 | |
| JP5364323B2 (ja) | シリンダ装置 | |
| JP5517368B2 (ja) | アクチュエータ | |
| WO2017073540A1 (ja) | 油圧機器 | |
| JP6368204B2 (ja) | 鉄道用制振装置 | |
| JP5543996B2 (ja) | アクチュエータ | |
| CN103347767B (zh) | 铁路车辆用减震装置 | |
| US7766138B2 (en) | Arrangement for telescopic fork leg with parallel damping | |
| JP6654943B2 (ja) | 鉄道車両用制振装置 | |
| WO2010049524A1 (en) | Arrangement for telescopic fork leg with parallel damping | |
| CN112789412B (zh) | 用于在水下使用的具有液压伺服驱动装置的液压系统 | |
| JP7360355B2 (ja) | シリンダ装置 | |
| JP6853637B2 (ja) | 減衰弁およびシリンダ装置 | |
| JP2021193311A (ja) | シリンダ装置 | |
| JP7801146B2 (ja) | シリンダ装置 | |
| TWI640702B (zh) | Cylinder device | |
| WO2018084098A1 (ja) | バルブブロック | |
| JP2019183979A (ja) | 鉄道車両用ダンパ | |
| JP6975093B2 (ja) | 鉄道車両用ダンパ | |
| CA2511067C (en) | Aircraft landing gear with vibration damper | |
| JP2011117494A (ja) | フロントフォーク | |
| WO2016158816A1 (ja) | 鉄道車両用ダンパ | |
| JP5981869B2 (ja) | ダンパ | |
| JP2013108579A (ja) | 減衰バルブ | |
| JP2011117492A (ja) | フロントフォーク |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 15853442 Country of ref document: EP Kind code of ref document: A1 |
|
| ENP | Entry into the national phase |
Ref document number: 20177006944 Country of ref document: KR Kind code of ref document: A |
|
| REEP | Request for entry into the european phase |
Ref document number: 2015853442 Country of ref document: EP |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 2015853442 Country of ref document: EP |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 15514327 Country of ref document: US |
|
| ENP | Entry into the national phase |
Ref document number: 2963221 Country of ref document: CA |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |