WO2014057746A1 - シリンダ駆動装置 - Google Patents
シリンダ駆動装置 Download PDFInfo
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- WO2014057746A1 WO2014057746A1 PCT/JP2013/073592 JP2013073592W WO2014057746A1 WO 2014057746 A1 WO2014057746 A1 WO 2014057746A1 JP 2013073592 W JP2013073592 W JP 2013073592W WO 2014057746 A1 WO2014057746 A1 WO 2014057746A1
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- passage
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/149—Fluid interconnections, e.g. fluid connectors, passages
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B7/00—Systems in which the movement produced is definitely related to the output of a volumetric pump; Telemotors
- F15B7/005—With rotary or crank input
- F15B7/006—Rotary pump input
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/18—Combined units comprising both motor and pump
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/2053—Type of pump
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/2053—Type of pump
- F15B2211/20561—Type of pump reversible
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/27—Directional control by means of the pressure source
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/305—Directional control characterised by the type of valves
- F15B2211/30505—Non-return valves, i.e. check valves
- F15B2211/3051—Cross-check valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/305—Directional control characterised by the type of valves
- F15B2211/3056—Assemblies of multiple valves
- F15B2211/30565—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve
- F15B2211/3058—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve having additional valves for interconnecting the fluid chambers of a double-acting actuator, e.g. for regeneration mode or for floating mode
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/40—Flow control
- F15B2211/405—Flow control characterised by the type of flow control means or valve
- F15B2211/40507—Flow control characterised by the type of flow control means or valve with constant throttles or orifices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/40—Flow control
- F15B2211/405—Flow control characterised by the type of flow control means or valve
- F15B2211/40576—Assemblies of multiple valves
- F15B2211/40584—Assemblies of multiple valves the flow control means arranged in parallel with a check valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/40—Flow control
- F15B2211/415—Flow control characterised by the connections of the flow control means in the circuit
- F15B2211/41563—Flow control characterised by the connections of the flow control means in the circuit being connected to a pressure source and a return line
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/50—Pressure control
- F15B2211/505—Pressure control characterised by the type of pressure control means
- F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
- F15B2211/50518—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using pressure relief valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/50—Pressure control
- F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
- F15B2211/5159—Pressure control characterised by the connections of the pressure control means in the circuit being connected to an output member and a return line
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
- F15B2211/7051—Linear output members
- F15B2211/7053—Double-acting output members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/76—Control of force or torque of the output member
- F15B2211/761—Control of a negative load, i.e. of a load generating hydraulic energy
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/785—Compensation of the difference in flow rate in closed fluid circuits using differential actuators
Definitions
- the present invention relates to a cylinder driving device for driving a cylinder.
- JP 28246659B discloses a cylinder driving device that drives a single-acting cylinder using hydraulic oil.
- This cylinder driving device is configured to extend and contract the cylinder by supplying and discharging hydraulic oil in the bottom side chamber of the cylinder.
- the cylinder drive device described above is switched so that the working oil stored in the tank can be supplied to the pump or the working oil in the bottom side chamber can be discharged to the tank by moving the spool according to the pilot pressure.
- a valve is provided, and the configuration of the cylinder driving device is complicated.
- An object of the present invention is to provide a cylinder driving device having a simple configuration with a small number of parts.
- a cylinder driving device includes a cylinder having a first chamber and a second chamber that are partitioned by a piston provided on a piston rod, a first port, and a second port.
- a pump capable of discharging the working fluid; and a tank for storing the working fluid.
- the cylinder driving device includes a first passage communicating the first chamber and the first port, a second passage communicating the second chamber and the tank, a third passage communicating the second port and the tank, and a third passage.
- the operating check valve allows the flow of the working fluid from the pump to the first chamber, and the working fluid flows from the first chamber to the pump in accordance with the fluid pressure of the working fluid in the third passage between the pump and the throttle. Allow flow.
- the cylinder is configured such that when the pump discharges the working fluid from the first port, the discharged working fluid is supplied to the first chamber via the operation check valve, so that the piston rod moves in the extending direction. The Further, in the cylinder, when the pump discharges the working fluid from the second port, the working fluid in the first chamber is discharged from the first chamber via the operation check valve so that the piston rod moves in the contracting direction. Configured.
- FIG. 1 is a schematic configuration diagram of a cylinder driving device according to the first embodiment.
- FIG. 2 is a circuit diagram showing the cylinder driving device according to the first embodiment.
- FIG. 3 is a circuit diagram showing a cylinder driving device according to the second embodiment.
- a cylinder driving device 100 shown in FIGS. 1 and 2 is a device that is mounted on an agricultural machine, a work machine, or the like and drives the cylinder 10 using hydraulic oil.
- the cylinder drive device 100 includes a cylinder 10 configured to be extendable, a pump 20 that pumps hydraulic oil as a working fluid, a drive motor 30 that drives the pump 20, and a tank 40 that stores hydraulic oil. .
- the pump 20, the drive motor 30, the tank 40, the various passages 51, 52, 53 through which the hydraulic oil flows, and the valves provided in these passages 51, 52, 53 constitute one unit member U (see FIG. 1).
- the unit member U is disposed adjacent to the cylinder 10. Thereby, the cylinder drive device 100 can be configured compactly.
- the cylinder 10 includes a cylindrical main body 11, a piston rod 12 inserted into the main body 11 from one end of the main body 11, and an end of the piston rod 12. And a piston 13 that slides along the inner peripheral surface of the portion 11.
- the interior of the main body 11 is partitioned into a first chamber 14 and a second chamber 15 by a piston 13.
- the first chamber 14 and the second chamber 15 are filled with hydraulic oil.
- the end of the main body 11 of the cylinder 10 is fixed to a predetermined position of a body such as an agricultural machine, and the end of the piston rod 12 positioned outside the main body 11 is fixed to a drive target.
- the piston rod 12 moves in the extending direction by the hydraulic pressure of the hydraulic oil in the first chamber 14, and the hydraulic oil is discharged from the first chamber 14.
- the single-acting cylinder is configured such that the piston rod 12 moves in the contraction direction due to its own weight (piston rod 12 and its own weight).
- the pump 20 is a bidirectional pump having a first port 21 and a second port 22.
- the pump 20 is connected to the drive motor 30 and is driven based on the rotational driving force of the drive motor 30.
- the pump 20 discharges the hydraulic oil sucked from the second port 22 when the drive motor 30 rotates in the forward direction from the first port 21, and the hydraulic oil sucked from the first port 21 when the drive motor 30 rotates in the reverse direction. 2 port 22 discharges.
- the first chamber 14 of the cylinder 10 and the first port 21 of the pump 20 communicate with each other through the first passage 51.
- the second port 22 of the pump 20 and the tank 40 communicate with each other through the third passage 53.
- the second chamber 15 of the cylinder 10 communicates with the third passage 53 through the second passage 52. Therefore, the second chamber 15 is connected to the tank 40 through the second passage 52 and the third passage 53.
- the third passage 53 is provided with an orifice 53A as a throttle for imparting resistance to the hydraulic oil flowing in the third passage 53. Further, a bypass passage 54 is connected to the third passage 53 so as to bypass the orifice 53A. One end of the bypass passage 54 is connected to the third passage 53 closer to the pump 20 than the position where the orifice 53A is disposed, and the other end of the bypass passage 54 is a third passage closer to the tank 40 than the position where the orifice 53A is disposed. 53.
- the bypass passage 54 is provided with a check valve 54A that allows only the flow of hydraulic oil toward the pump 20.
- An operation check valve 60 is installed in the first passage 51 that connects the first chamber 14 of the cylinder 10 and the first port 21 of the pump 20.
- the operation check valve 60 is configured to allow the flow of hydraulic oil from the pump 20 to the first chamber 14 when the pump 20 discharges hydraulic oil from the first port 21.
- hydraulic oil in the third passage 53 between the pump 20 and the orifice 53A is always guided to the back pressure chamber of the operation check valve 60 through the connection path 55.
- the operation check valve 60 opens when the hydraulic pressure (pilot pressure) of the hydraulic oil guided through the connection path 55 reaches the valve opening pressure, and allows the hydraulic oil to flow from the first chamber 14 to the pump 20. It is configured as follows.
- a return passage 56 for returning the hydraulic oil to the tank 40 is provided in the first passage 51 on the cylinder 10 side from the position where the operation check valve 60 is disposed.
- One end of the return passage 56 is connected to the first passage 51, and the other end of the return passage 56 is connected to the tank 40.
- a relief valve 56A is installed in the return passage 56.
- the relief valve 56A opens when the hydraulic pressure of the hydraulic oil in the first passage 51 reaches the relief pressure, and allows the hydraulic oil to pass through.
- the hydraulic oil that has passed through the relief valve 56 ⁇ / b> A is discharged to the tank 40 through the return passage 56.
- the second passage 52 provided for communicating the second chamber 15 of the cylinder 10 with the tank 40 is configured such that one end thereof is connected to the third passage 53 on the tank 40 side with respect to the orifice 53A.
- the first passage 51 and the second passage 52 are provided with a communication passage 57 that connects the passages 51 and 52.
- the communication passage 57 is provided with a manually operated manual valve 57A.
- the manual valve 57A is a valve capable of opening and closing the communication passage 57. During normal operation, the manual valve 57A is closed, and the communication between the first passage 51 and the second passage 52 is blocked. When the manual valve 57A is operated and opened, the first passage 51 and the second passage 52 communicate with each other. Thereby, the first chamber 14 of the cylinder 10 is released from the tank 40, and the cylinder 10 can be manually operated.
- the pump 20 discharges the hydraulic oil sucked from the first port 21 from the second port 22. Since the hydraulic oil discharged from the second port 22 passes through the orifice 53A of the third passage 53, the hydraulic pressure of the hydraulic oil upstream of the orifice 53A increases. When the oil pressure upstream of the orifice 53A reaches the valve opening pressure, the operation check valve 60 is opened, and the hydraulic oil is discharged from the first chamber 14 of the cylinder 10 toward the pump 20. At this time, the piston rod 12 moves in the contracting direction due to the piston rod 12 and its own weight, and the hydraulic oil is discharged from the first chamber 14 and the cylinder 10 contracts.
- the hydraulic oil discharged from the first chamber 14 is discharged from the second port 22 of the pump 20, passes through the orifice 53 ⁇ / b> A of the third passage 53, and is guided to the second chamber 15 and the tank 40 of the cylinder 10.
- the single-acting cylinder 10 can be expanded and contracted without a spool type switching valve as in the conventional method. Therefore, the number of parts provided in the cylinder driving device 100 can be reduced, and the configuration of the cylinder driving device 100 can be further simplified.
- one end of the second passage 52 is connected to the third passage 53 closer to the tank 40 than the orifice 53A, but may be directly connected to the tank 40.
- the cylinder 10 can be expanded and contracted by the cylinder driving device 100. Simplification can also be achieved.
- the cylinder drive device 100 by 2nd Embodiment of this invention is demonstrated.
- the cylinder drive device 100 according to the second embodiment is different from the cylinder drive device of the first embodiment in the configuration of the second passage 52.
- one end of the second passage 52 is not the third passage 53 on the tank 40 side relative to the orifice 53A, but the first passage 52 on the pump 20 side relative to the orifice 53A. Connected to three passages 53.
- the hydraulic oil in the second chamber 15 of the cylinder 10 is sucked into the pump 20 through the second passage 52 and the third passage 53.
- the hydraulic oil in the tank 40 is also sucked into the pump 20 through the bypass passage 54 having the check valve 54A and the third passage 53 having the orifice 53A.
- the hydraulic oil sucked from the second port 22 of the pump 20 is discharged from the first port 21 of the pump 20.
- the hydraulic oil discharged in this way pushes open the operation check valve 60 and is supplied to the first chamber 14 of the cylinder 10.
- the hydraulic pressure of the hydraulic oil in the first chamber 14 increases, and the piston rod 12 moves in the extending direction by the hydraulic pressure.
- the cylinder 10 extends.
- the pump 20 discharges the hydraulic oil sucked from the first port 21 from the second port 22. Since the hydraulic oil discharged from the second port 22 passes through the orifice 53A of the third passage 53, the hydraulic pressure of the hydraulic oil upstream of the orifice 53A increases. When the hydraulic pressure upstream of the orifice 53A reaches the valve opening pressure, the operation check valve 60 is opened, and the hydraulic oil is discharged from the first chamber 14 of the cylinder 10 toward the pump 20.
- the relatively high pressure hydraulic oil upstream of the orifice 53A is also supplied to the second chamber 15 of the cylinder 10 through the second passage 52, and becomes a thrust for moving the piston rod 12 in the contraction direction.
- the piston rod 12 moves in the contracting direction by the thrust and the own weight on the piston rod 12 side. As a result, the hydraulic oil is discharged from the first chamber 14 and the cylinder 10 contracts.
- the cylinder driving device 100 of the second embodiment described above when the cylinder 10 is contracted, the hydraulic oil upstream of the orifice 53A is guided to the second chamber 15 and the hydraulic pressure of the hydraulic oil moves the piston rod 12.
- the cylinder 10 can be contracted smoothly by utilizing the thrust and the own weight on the piston rod 12 side.
- the cylinder driving device 100 of the second embodiment can also reduce the number of parts provided in the cylinder driving device 100, and the configuration of the cylinder driving device 100 can be simplified.
- the bypass passage 54 having the check valve 54A is provided in the third passage 53, but the check valve 54A and the bypass passage 54 are not necessarily provided.
- the orifice 53A is set so that the degree of resistance application is smaller than that in the first and second embodiments. Even in this case, the orifice 53A is set so that the hydraulic pressure upstream of the orifice 53A reaches the valve opening pressure when the pump 20 is reversely rotated.
- the cylinder 10 is configured such that the piston rod 12 moves in the contracting direction by its own weight on the piston rod 12 side.
- the cylinder 10 may be configured such that the piston rod 12 moves in the contracting direction by the biasing force of a biasing member such as a spring.
- the working oil is used as the working fluid, but an incompressible fluid such as water or an aqueous solution may be used instead of the working oil. Good.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
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Abstract
Description
図1及び図2を参照して、第1実施形態によるシリンダ駆動装置100の構成について説明する。
次に、図3を参照して、本発明の第2実施形態によるシリンダ駆動装置100について説明する。第2実施形態によるシリンダ駆動装置100は、第2通路52の構成において第1実施形態のシリンダ駆動装置と相違する。
Claims (5)
- シリンダを駆動するシリンダ駆動装置であって、
ピストンロッドに設けられたピストンにより仕切られる第1室及び第2室を有するシリンダと、
第1ポート及び第2ポートを有し、いずれか一方のポートから作動流体を吐出可能なポンプと、
作動流体を貯留するタンクと、
前記第1室と前記第1ポートを連通する第1通路と、
前記第2室と前記タンクを連通する第2通路と、
前記第2ポートと前記タンクを連通する第3通路と、
前記第3通路を流れる作動流体に抵抗を付与する絞りと、
前記第1通路に設けられ、前記ポンプから前記第1室への作動流体の流れを許容するとともに、前記ポンプと前記絞りとの間の第3通路の作動流体の流体圧に応じて前記第1室から前記ポンプへの作動流体の流れを許容するオペレートチェック弁と、を備え、
前記シリンダは、
前記ポンプが前記第1ポートから作動流体を吐出する場合、吐出された作動流体が前記オペレートチェック弁を介して前記第1室に供給されることで、前記ピストンロッドが伸長方向に移動し、
前記ポンプが前記第2ポートから作動流体を吐出する場合、前記第1室の作動流体が前記オペレートチェック弁を介して前記第1室から排出されることで、前記ピストンロッドが収縮方向に移動するように構成される、
シリンダ駆動装置。 - 請求項1に記載のシリンダ駆動装置であって、
前記絞りをバイパスするように前記第3通路に接続されるバイパス通路と、
前記バイパス通路に設けられ、前記ポンプへの作動流体の流れのみを許容するチェック弁と、をさらに備える、
シリンダ駆動装置。 - 請求項1に記載のシリンダ駆動装置であって、
前記第2通路の一端は、前記絞りよりもタンク側の前記第3通路に接続される、
シリンダ駆動装置。 - 請求項1に記載のシリンダ駆動装置であって、
前記第2通路の一端は、前記絞りよりもポンプ側の前記第3通路に接続される、
シリンダ駆動装置。 - 請求項1に記載のシリンダ駆動装置であって、
前記シリンダは、前記第1室内の作動流体の流体圧により前記ピストンロッドが伸長方向に移動し、前記ピストンロッド側の自重により前記ピストンロッドが収縮方向に移動するように構成される、
シリンダ駆動装置。
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2886362A CA2886362A1 (en) | 2012-10-10 | 2013-09-03 | Cylinder driving apparatus |
| US14/432,756 US10066650B2 (en) | 2012-10-10 | 2013-09-03 | Cylinder driving apparatus |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012225279A JP6093535B2 (ja) | 2012-10-10 | 2012-10-10 | シリンダ駆動装置 |
| JP2012-225279 | 2012-10-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2014057746A1 true WO2014057746A1 (ja) | 2014-04-17 |
Family
ID=50477217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2013/073592 Ceased WO2014057746A1 (ja) | 2012-10-10 | 2013-09-03 | シリンダ駆動装置 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US10066650B2 (ja) |
| JP (1) | JP6093535B2 (ja) |
| CA (1) | CA2886362A1 (ja) |
| WO (1) | WO2014057746A1 (ja) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3096598A1 (en) * | 2014-01-24 | 2016-11-30 | Kinze Manufacturing, Inc. | Agricultural implement with electro-hydraulic cylinders |
| DE102015120131B4 (de) * | 2015-11-20 | 2023-06-01 | Robert Bosch Gmbh | Lenksystem zum Betreiben eines Lenksystems |
| GB2586639A (en) * | 2019-08-30 | 2021-03-03 | Airbus Operations Ltd | Hydraulic actuation system for an aircraft |
| JP7510271B2 (ja) * | 2020-04-17 | 2024-07-03 | カヤバ株式会社 | 電動流体圧シリンダ |
| DE102021204291B3 (de) | 2021-04-29 | 2022-06-15 | Hawe Hydraulik Se | Hydrauliksystem für eine fahrbare Rettungsliege und fahrbare Rettungsliege |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49115594U (ja) * | 1973-02-07 | 1974-10-02 | ||
| JPS5264294U (ja) * | 1975-11-06 | 1977-05-12 | ||
| JPH0842512A (ja) * | 1994-08-04 | 1996-02-13 | Showa:Kk | 油圧システムの回路構造 |
| JP2824659B2 (ja) * | 1989-03-27 | 1998-11-11 | カヤバ工業株式会社 | 草刈機等の作業機の制御装置 |
| JP2002048105A (ja) * | 2000-08-03 | 2002-02-15 | Kayaba Ind Co Ltd | シリンダ装置 |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3905591B2 (ja) * | 1997-02-04 | 2007-04-18 | 株式会社ショーワ | 船舶用推進機のチルト・トリム装置及びチルト・トリム装置組立方法 |
| JP2004293647A (ja) * | 2003-03-26 | 2004-10-21 | Showa Corp | パワーチルト装置 |
| WO2005039018A2 (en) * | 2003-10-14 | 2005-04-28 | The Braun Corporation | Hydraulic drive system |
| DE102004029409A1 (de) * | 2004-06-18 | 2006-01-05 | Jungheinrich Ag | Druckmittelbetätigte Stelleinrichtung, insbesondere für eine Fahrzeuglenkvorrichtung |
| JP4616672B2 (ja) * | 2005-03-14 | 2011-01-19 | カヤバ工業株式会社 | フィルタ一体化オリフィス、スローリターン弁、油圧駆動ユニット |
| ITMI20060426A1 (it) * | 2006-03-10 | 2007-09-11 | Faac Spa | Sistema di movimentazione con attuatore idraulico a doppio effetto per la movimentazione di cancelli |
| JP4424369B2 (ja) * | 2007-04-25 | 2010-03-03 | トヨタ自動車株式会社 | 自動変速機のダンパ機構 |
| JP4856578B2 (ja) * | 2007-04-25 | 2012-01-18 | カヤバ工業株式会社 | 流体圧駆動ユニット及び除雪ユニット |
| KR100899776B1 (ko) * | 2007-10-05 | 2009-05-28 | 주식회사알피엠텍 | 밸브 개폐용 유압식 조작기의 수동조절장치 |
| US8997626B2 (en) * | 2010-04-07 | 2015-04-07 | Parker-Hannifin Corporation | Electro-hydraulic actuator including a release valve assembly |
| US9187297B2 (en) * | 2011-05-13 | 2015-11-17 | Kabushiki Kaisha Kobe Seiko Sho | Hydraulic driving apparatus for working machine |
| JP5941641B2 (ja) * | 2011-09-15 | 2016-06-29 | 住友精密工業株式会社 | 航空機の脚揚降装置 |
| US8800279B2 (en) * | 2011-10-13 | 2014-08-12 | Kanzaki Kokyukoki Mfg. Co., Ltd. | Hydraulic transmission system for zero-turn vehicle |
-
2012
- 2012-10-10 JP JP2012225279A patent/JP6093535B2/ja active Active
-
2013
- 2013-09-03 CA CA2886362A patent/CA2886362A1/en not_active Abandoned
- 2013-09-03 WO PCT/JP2013/073592 patent/WO2014057746A1/ja not_active Ceased
- 2013-09-03 US US14/432,756 patent/US10066650B2/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49115594U (ja) * | 1973-02-07 | 1974-10-02 | ||
| JPS5264294U (ja) * | 1975-11-06 | 1977-05-12 | ||
| JP2824659B2 (ja) * | 1989-03-27 | 1998-11-11 | カヤバ工業株式会社 | 草刈機等の作業機の制御装置 |
| JPH0842512A (ja) * | 1994-08-04 | 1996-02-13 | Showa:Kk | 油圧システムの回路構造 |
| JP2002048105A (ja) * | 2000-08-03 | 2002-02-15 | Kayaba Ind Co Ltd | シリンダ装置 |
Also Published As
| Publication number | Publication date |
|---|---|
| US10066650B2 (en) | 2018-09-04 |
| US20150260204A1 (en) | 2015-09-17 |
| CA2886362A1 (en) | 2014-04-17 |
| JP6093535B2 (ja) | 2017-03-08 |
| JP2014077488A (ja) | 2014-05-01 |
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