WO2016017377A1 - スピードコントローラ - Google Patents
スピードコントローラ Download PDFInfo
- Publication number
- WO2016017377A1 WO2016017377A1 PCT/JP2015/069431 JP2015069431W WO2016017377A1 WO 2016017377 A1 WO2016017377 A1 WO 2016017377A1 JP 2015069431 W JP2015069431 W JP 2015069431W WO 2016017377 A1 WO2016017377 A1 WO 2016017377A1
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- WIPO (PCT)
- Prior art keywords
- flow path
- valve
- flow
- port
- pressure fluid
- Prior art date
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Classifications
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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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
- F15B11/10—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor in which the servomotor position is a function of the pressure also pressure regulators as operating means for such systems, the device itself may be a position indicating system
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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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
- F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
- F15B11/0413—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed in one direction only, with no control in the reverse direction, e.g. check valve in parallel with a throttle 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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
- F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
- F15B11/046—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed depending on the position of the working member
- F15B11/048—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed depending on the position of the working member with deceleration control
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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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/027—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
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/24—Other details, e.g. assembly with regulating devices for restricting the stroke
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/18—Check valves with actuating mechanism; Combined check valves and actuated valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
- F16K31/1221—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston one side of the piston being spring-loaded
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
- F16K31/1223—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston one side of the piston being acted upon by the circulating fluid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/04—Means in valves for absorbing fluid energy for decreasing pressure or noise level, the throttle being incorporated in the closure member
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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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
- F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
- F15B11/0406—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed during starting or stopping
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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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/06—Servomotor systems without provision for follow-up action; Circuits therefor involving features specific to the use of a compressible medium, e.g. air, steam
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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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
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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
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/22—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/40—Flow control
- F15B2211/405—Flow control characterised by the type of flow control means or valve
- F15B2211/40515—Flow control characterised by the type of flow control means or valve with variable 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
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/75—Control of speed of the output member
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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
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/885—Control specific to the type of fluid, e.g. specific to magnetorheological fluid
- F15B2211/8855—Compressible fluids, e.g. specific to pneumatics
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/8593—Systems
- Y10T137/86928—Sequentially progressive opening or closing of plural valves
- Y10T137/86936—Pressure equalizing or auxiliary shunt flow
- Y10T137/86944—One valve seats against other valve [e.g., concentric valves]
- Y10T137/86968—With balancing chamber
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/8593—Systems
- Y10T137/87265—Dividing into parallel flow paths with recombining
- Y10T137/8741—With common operator
- Y10T137/87418—Balanced valve
Definitions
- the present invention relates to a speed controller, and more particularly to a speed controller connected to an external cylinder and capable of controlling the operation speed of the cylinder in a stepwise manner.
- Equipment using cylinders is often used in automated equipment lines that assemble machinery and electronic equipment.
- the cycle time can be shortened, but on the other hand, there is a problem that the impact at the time of stopping increases and the cylinder life is shortened.
- a shock absorber for example, oil type
- the mechanism part to which the piston of the cylinder is connected so that the impact at the time of stopping the cylinder does not increase even if the cylinder speed is increased, thereby reducing the impact at the time of stopping the cylinder.
- the method was general.
- Patent Document 1 a technique relating to a pneumatic cylinder with a cushion mechanism is also disclosed (Patent Document 1) in which a cushion mechanism for reducing the impact is provided in the cylinder itself to reduce the impact at the time of stopping.
- the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a speed controller capable of controlling the operation speed in one stroke of an external cylinder in a stepwise manner with a simple configuration without using a shock absorber.
- the disclosed speed controller includes a first flow path and a second flow path that allow a pressure fluid to flow through a first port and a second port provided in the main body, respectively.
- a first check valve that allows only a flow from the first port to the second port is provided, and a first needle valve that adjusts a flow rate of the flowing pressure fluid is provided in the second flow path.
- the second flow path is configured with an opening opening at a radial center position of the first check valve as a part of the flow path, and the first needle valve is a cylinder chamber provided in the main body portion.
- the tip of the needle shaft fixed to a piston that can be reciprocated inside the cylinder and protruded to the outside of the cylinder chamber is brought into contact with, close to, or entered into the opening hole, thereby opening the opening hole. Adjust the flow rate by changing the area
- a second check valve is provided to allow the above.
- the disclosed speed controller it is possible to realize a speed controller capable of controlling the operation speed in one stroke of an external cylinder in a stepwise manner with a simple configuration. Accordingly, it is possible to increase the speed of the cylinder operation and to reduce the impact when the cylinder is stopped without using a shock absorber.
- FIG. 1A is a plan sectional view (schematic diagram) showing an example of a speed controller 1 according to the present embodiment
- FIG. 1B is a front sectional diagram (schematic diagram).
- FIG. 2 is a circuit diagram in the case of comprising the speed controller 1 (here, two speed controllers 1A and 1B) and an external cylinder 2 shown in FIG. Note that components having the same function are denoted by the same reference symbols throughout the drawings for describing the embodiments, and the repetitive description thereof may be omitted.
- the speed controller 1 allows pressure fluid (for example, compressed air) to flow through an external return-acting cylinder (hereinafter simply referred to as “cylinder”) 2 constituting an automatic equipment line or the like. It is incorporated (connected) in the flow path and controls the operating speed of the cylinder 2 in stages (for example, in two stages of high speed and low speed).
- pressure fluid for example, compressed air
- cylinder external return-acting cylinder
- the speed controller 1 includes a plurality of flow paths through which pressure fluid flows in the main body 10 (details will be described later).
- a cylinder chamber 20 that holds the piston 30 so as to reciprocate is provided inside the main body 10.
- a resin material for example, POM, PBT, etc.
- a metal for example, a metal, etc., depending on use conditions, except for a portion where a rubber material such as a valve body 28a and an O-ring 38 described later is used.
- a material for example, stainless steel, brass, etc. is appropriately used.
- the cylinder chamber 20 airtightly seals the inside and outside of the cylinder chamber 20 on one end side (here, the inside of the main body portion 10 and the portion that becomes the first flow path 16 and the second flow path 18).
- a housing 36 is provided which holds and partitions.
- a cap 40 is provided on the other end side to partition the inside and the outside of the cylinder chamber 20 (here, a portion that is the outside of the main body 10) while maintaining airtightness. That is, the cylinder chamber 20 is configured such that an internal space is formed by the main body 10, the housing 36, and the cap 40.
- the plurality of flow paths provided in the main body 10 are more specifically, the first flow path 16 (FIG. 2) that allows the pressure fluid to flow through the first port 12 and the second port 14.
- a flow path exemplified by an arrow A in the inside) is provided.
- a second flow path 18 (flow path illustrated by arrow B in FIG. 2) that allows the first port 12 and the second port 14 to communicate with each other to allow the pressure fluid to flow. Is provided.
- a third flow path 22 (flow path exemplified by arrow C in FIG. 2) that allows the pressure fluid to flow through the first port 12 and the cylinder chamber 20 formed inside the main body 10 is provided.
- a fourth flow path 26 (flow path exemplified by arrow D in FIG. 2) is provided for communicating the pressure fluid by communicating the cylinder chamber 20 and the exhaust port 24 provided in the main body 10. .
- the first flow path 16 is provided with a first check valve 28 that allows only flow from the first port 12 to the second port 14.
- the first check valve 28 includes a valve body 28a and a valve seat 28b, and has an effect of allowing the pressure fluid to pass only in the direction illustrated by the arrow A in FIG. That is, when the pressure fluid is allowed to flow from the first port 12 side into the first flow path 16, the valve body 28a is separated from the valve seat 28b by the pressure of the pressure fluid, and the flow path is opened. On the other hand, when the pressure fluid is allowed to flow from the second port 14 side into the first flow path 16, the valve body 28a is brought into close contact with the valve seat 28b by the pressure of the pressure fluid, and the flow path is closed.
- the valve body 28 a is formed using a rubber material such as NBR
- the valve seat 28 b is formed using a resin material integrally with the main body portion 10.
- the first check valve 28 is provided with an opening hole 28d that opens to a central position in the radial direction.
- a valve body presser 28c that is fitted and fixed to the protruding portion 10a that protrudes to the inside of the main body portion 10 in a state where the ring-shaped valve body 28a is fixed to the outer periphery.
- An opening hole 28d is formed at the radial center position of the valve body presser 28c.
- the valve body presser 28c is configured to be fitted and fixed to the protruding portion 10a by a snap-fit engagement structure, and can be more easily assembled (see FIGS. 1 and 2).
- the second flow path 18 is configured such that an opening hole 28d that opens at the radial center position of the first check valve 28 forms a part of the flow path.
- the second flow path 18 is provided with a first needle valve 32 for adjusting the flow rate of the pressure fluid flowing therethrough. More specifically, the first needle valve 32 changes the opening area of the opening hole 28d by causing the tip end portion 34a of the needle shaft 34 to abut, approach, or enter the opening hole 28d of the first check valve 28. By doing so, the flow rate is adjusted.
- the needle shaft 34 is fixed to a piston 30 disposed in the cylinder chamber 20 so as to be reciprocally movable, and can be reciprocated in the axial direction together with the piston 30.
- the needle shaft 34 and the piston 30 are integrally formed, but a structure formed separately may be used.
- the needle shaft 34 has a configuration in which a distal end portion 34 a protrudes outside the cylinder chamber 20 through the housing 36 on one end side of the cylinder chamber 20.
- the housing 36 through which the needle shaft 34 is inserted is provided with a rubber O-ring 38 at the sliding position, and the needle shaft 34 can move in the axial direction while maintaining airtightness with respect to the housing 36. ing.
- the first check valve 28 uses the opening hole 28d of the valve body presser 28c in combination with the distal end portion 34a of the needle shaft 34, so that the needle valve Can also function. This makes it possible to simplify the structure and reduce the number of parts compared to a configuration in which a check valve and a needle valve are separately provided, and as a result, reduce assembly costs and parts costs. It becomes possible.
- a moving member for moving the piston 30 and the needle shaft 34 is provided.
- an urging member for example, a mechanism for moving by the urging force of the urging member
- a motor for example, a stepping motor driven by a control unit, a rack and pinion, a ball screw, or the like
- a configuration using a moving mechanism is employed.
- an urging member is used as the moving member.
- the biasing member is a first biasing member (for example, a coil spring) disposed in the cylinder chamber 20 so that one end thereof is in contact with the piston 30 and the other end is in contact with the cap 40.
- Other spring members 42 are provided.
- the first urging member 42 is configured to reduce the volume in the cylinder chamber 20 and to move the tip portion 34a of the needle shaft 34 into contact with, close to, or enter the opening hole 28d.
- An urging force for moving the shaft 34 is generated.
- the pressure of the pressurized fluid compressed air or the like
- an adjustment member is provided that defines the stop position of the piston 30 (that is, the stop position of the tip end portion 34a of the needle shaft 34) and can adjust the stop position.
- a first biasing member 42 is provided as a moving member (biasing member), and an adjustable stopper 44 is provided as an adjusting member.
- the adjustable stopper 44 is fixed to the opposite side of the piston 30 to the side on which the needle shaft 34 is fixed, and is attached to a stroke rod 44a provided through the cap 40 and a screw portion 44b provided at the end of the stroke rod 44a.
- the adjusting screw 44c is screwed together. According to this, when the piston 30 is moved in the direction of decreasing the volume in the cylinder chamber 20, the end of the adjustment screw 44 c (the end on the side facing the cap 40) comes into contact with the cap 40, thereby The movement of 30 is stopped. That is, the stop position of the piston 30 (and the needle shaft 34) is defined.
- the distance L between the cap 40 and the end of the adjustment screw 44c can be adjusted by rotating the adjustment screw 44c, the stop position of the piston 30 (and the needle shaft 34) is adjusted. Is possible.
- symbol 44d in a figure is a nut for fixing the adjustment screw 44c so that the adjustment screw 44c may not rotate unintentionally.
- the stop position of the piston 30 (and the needle shaft 34) is adjusted by the control of the motor by the control unit, so that the control unit and the motor are adjusted. Configure the member.
- a configuration without an adjusting member for example, the above-described adjustable stopper 44
- a configuration is also used in which a through hole is provided in the distal end portion 34a that allows flow from the inside of the cylinder chamber 20 to the first port 12 when the distal end portion 34a of the needle shaft 34 abuts the opening hole 28d. (Not shown).
- the third flow path 22 is provided with a second check valve 46 that allows only the flow from the first port 12 toward the inside of the cylinder chamber 20.
- the second check valve 46 is fixed to a valve body 46a, a valve seat 46b, and a valve body 46a that are configured to reciprocate in a valve box 46e provided in the middle of the third flow path 22.
- An O-ring 46c that maintains airtightness between the valve 46a and the valve seat 46b, and a second biasing member that biases the valve body 46a (here, the O-ring 46c) in close contact with the valve seat 46b (for example, a coil Spring) 46d and an X ring 46f which is fixed to the valve body 46a and holds the airtightness between the valve body 46a and the valve box 46e, and has pressure only in the direction illustrated by the arrow C in FIG. Acts to allow fluid to pass through.
- a second biasing member that biases the valve body 46a (here, the O-ring 46c) in close contact with the valve seat 46b (for example, a coil Spring) 46d and an X ring 46f which is fixed to the valve body 46a and holds the airtightness between the valve body 46a and the valve box 46e, and has pressure only in the direction illustrated by the arrow C in FIG. Acts to allow fluid to pass through.
- valve body 46a when the pressure fluid is caused to flow from the first port 12 side into the third flow path 22, the valve body 46a is opposed to the urging force of the second urging member 46d by the pressure of the pressure fluid. A flow path is opened away from.
- the urging force of the second urging member 46d causes the valve body 46a (here, the O-ring 46c). Close to the valve seat 46b and the flow path is closed.
- the valve body 46a is formed using a resin material
- the valve seat 46b is formed using a resin material integrally with the main body 10
- the O-ring 46c and the X-ring 46f are formed using a rubber material.
- the O-ring 46c may be configured to be fixed to the valve seat 46b.
- the X ring 46f may be replaced by an O ring (not shown).
- the third flow path 22 is formed such that a middle portion of the flow path passes through the inside of the valve body 46a of the second check valve 46 (in the drawing, (Indicated by reference numeral 22a). Further, the valve body 46a is provided with a third check valve 47 that allows only the flow from the first port 12 toward the inside of the cylinder chamber 20 in the middle portion 22a of the third flow path 22 formed inside. ing.
- the third check valve 47 is a third attachment that urges the valve body 47a, the valve seat 47b, and the valve body 47a, which are configured to be movable in the middle portion 22a of the third flow path 22, in a direction to bring the valve body 47a into close contact with the valve seat 47b.
- a biasing member (coil spring as an example) 47c is provided, and the pressure fluid is allowed to pass only in the direction illustrated by the arrow C in FIG. 2 as with the second check valve 46 described above.
- valve body 47a when the pressure fluid is caused to flow from the first port 12 side into the third flow path 22 (22a in this case), the valve body resists the urging force of the third urging member 47c by the pressure of the pressure fluid. 47a is separated from the valve seat 47b and the flow path is opened. On the other hand, when the flow of the pressure fluid from the first port 12 side into the third flow path 22 (22a in this case) is stopped, the valve body 47a is moved to the valve seat by the urging force of the third urging member 47c. The channel closes in close contact with 47b.
- the valve body 47a is formed using a steel ball made of stainless steel or the like, and the valve seat 47b is formed using a resin material integrally with the valve body 46a of the second check valve 46.
- the third flow path 22 is provided with the second check valve 46 and the third check valve 47 that allow only the flow from the first port 12 toward the inside of the cylinder chamber 20.
- the third check valve 47 is disposed inside the valve body 46 a of the second check valve 46.
- the valve body 46a reciprocating in the valve box 46e performs an operation of sliding with the X ring 46f interposed between the valve body 46e and the valve box 46e. Accordingly, when the flow of the pressure fluid from the first port 12 side into the third flow path 22 is stopped due to the sliding resistance, the valve body 46a is applied by the urging force of the second urging member 46d. There arises a problem that the operation until (the O-ring 46c) is in close contact with the valve seat 46b and the flow path is closed is not completed instantaneously. That is, when used as a fluid control device, there is a problem that it is not possible to quickly move to the next process, and as a result, a problem of an increase in cycle time may occur.
- a steel ball that is urged by a third urging member (for example, a coil spring) 47c and can be operated instantaneously inside the valve body 46a of the second check valve 46.
- a third urging member for example, a coil spring
- the third flow path 22 is also closed by the second check valve 46 at a predetermined time difference, it is possible to reliably prevent leakage of the pressure fluid by the double closing structure.
- the configuration in which the third check valve 47 is provided inside the valve body 46a of the second check valve 46 can achieve downsizing of the entire apparatus and simplification of the mechanism.
- the second check valve 46 and the third check valve 47 are not limited to the above configuration, and other check valve structures may be adopted (not shown).
- the fourth flow path 26 is a side where the second urging member 46d is provided with respect to the valve body 46a in the valve box 46e which is a space part in which the valve body 46a of the second check valve 46 reciprocates. This region is configured to form a part of the flow path.
- the fourth flow path 26 is provided with a second needle valve 48 that adjusts the flow rate of the pressure fluid flowing therethrough.
- the fourth flow path 26 communicates from the inside of the cylinder chamber 20 to the exhaust port 24 via the valve box 46 e and the second needle valve 48, It is a flow path leading to.
- a portion 22 b connecting the valve box 46 e and the inside of the cylinder chamber 20 in the third flow path 22 is used as a shared flow path with the fourth flow path 26.
- the present invention is not limited to this configuration, and a configuration may be employed in which a dedicated channel for the fourth channel 26 that connects the inside of the cylinder chamber 20 and the valve box 46e is provided (not shown).
- the above-described second check valve 46 also serves as an on-off valve that opens and closes the fourth flow path 26. More specifically, in the valve box 46e, a valve seat 46g for opening and closing the fourth flow path 26 is provided on the side where the second urging member 46d is provided with respect to the valve body 46a. . Furthermore, an O-ring 46h is provided that is fixed to the valve body 46a and maintains airtightness between the valve body 46a and the valve seat 46g.
- valve body 46a of the second check valve 46 moves in the direction of opening the third flow path 22
- the valve body 46a comes into close contact with the valve seat 46g
- the fourth flow path 26 becomes open. Close.
- the valve body 46a of the second check valve 46 moves in a direction to close the third flow path 22
- the valve body 46a (here, the O-ring 46h) is separated from the valve seat 46g, and the fourth flow path 26 is opened. Open.
- the fourth flow path 26 is opened and closed, and when the fourth flow path 26 is opened, the pressure fluid is allowed to pass in the direction illustrated by the arrow D in FIG.
- the problem that the pressure fluid that should originally flow from the inside of the cylinder chamber 20 to the exhaust port 24 via the fourth flow path 26 flows to the third flow path 22 is solved. Can do. This is because the fourth channel 26 is opened when the third channel 22 is closed, and the fourth channel 26 is closed when the third channel 22 is opened. is there.
- the second biasing member 46 d of the second check valve 46 is connected to the valve body 46 a of the second check valve 46. Even if an urging force is applied, it may be difficult to move (that is, it is difficult to close the third flow path 22). However, in the present embodiment, as described above, the third that can be operated instantaneously.
- the configuration including the check valve 47 can also avoid the problem.
- the opening and closing of the third flow path 22 and the opening and closing of the fourth flow path 26 may have some overlap.
- the second needle valve 48 more specifically changes the opening area of the orifice 48c by bringing the tip 48b of the needle shaft 48a into contact with, approaching, or approaching an orifice 48c having a predetermined opening. By doing so, the flow rate is adjusted.
- a threaded portion 48d provided at the rear end portion of the needle shaft 48a is rotatably engaged with the main body portion 10, and the needle shaft 48a is moved in the axial direction by rotating the adjustment knob 48e. Therefore, the position of the tip 48b of the needle shaft 48a with respect to the orifice 48c, that is, the opening area of the orifice 48c can be adjusted.
- the position and shape of the orifice 48c provided in the middle of the fourth channel 26 are appropriately set and are not particularly limited.
- Pressure fluid (compressed air as an example) is supplied from an external pressure fluid supply source 3 and supplied to the first port 12 of the speed controller 1 (1A) via the flow path 60, the electromagnetic valve 4, and the flow path 62.
- the operation of the electromagnetic valve 4 will be described later.
- the pressure fluid supplied to the first port 12 of the speed controller 1 (1A) flows through the first flow path 16 to the second port 14 via the first check valve 28 as indicated by an arrow A. Further, the cylinder chamber of the cylinder 2 through the flow path 64 (in this case, one end 2b 1 of the cylinder chamber 2a 1 with respect to the piston 2b) is fed into. As a result, the pressure of the pressure fluid supplied into the cylinder chamber 2a 1 acts on the one end 2b 1 side of the piston 2b, so that the piston 2b is driven in the X1 direction.
- the pressure fluid supplied to the first port 12 of the speed controller 1 (1A) flows through the third flow path 22 as shown by the arrow C and enters the cylinder chamber 20 of the main body 10. Inflow (note that the flow direction is controlled by the second check valve 46 and the third check valve 47).
- the pressure of the pressure fluid supplied into the cylinder chamber 20 acts on the one end 30a side of the piston 30, the piston 30 is driven in the Y1 direction against the urging force of the first urging member 42.
- the pressure fluid is stored in the cylinder chamber 20.
- the needle shaft 34 when the piston 30 is driven in the Y1 direction, the needle shaft 34 also moves in the Y1 direction, so that the opening degree of the first needle valve 32 is relatively large (no throttling action occurs). State). Therefore, the pressure fluid from the first port 12 toward the second port 14 can flow using the two flow paths of the first flow path and the second flow path as much as possible.
- the pressure fluid delivered from the cylinder 2 is supplied to the second port 14 of the speed controller 1 (1B) via the flow path 66.
- the flow rate that is, the flow rate
- the speed controller 1 (1B) It becomes possible to adjust (control) the operating speed (axial movement speed) of the piston 2b of the cylinder 2.
- the pressure fluid supplied to the second port 14 of the speed controller 1 (1B) flows through the second flow path 18 to the first port 12 through the first needle valve 32 as indicated by an arrow B.
- the pressure fluid sent from the first port 12 is sent to the atmosphere via the flow path 68 and the electromagnetic valve 4.
- the piston 30 moves in a predetermined direction in the Y1 direction. Since the needle shaft 34 has moved to the position and the needle shaft 34 has also moved in the Y1 direction, the first needle valve 32 is in a state in which the opening degree is relatively large (a state in which no throttling action occurs). At this time, the flow rate of the pressure fluid passing through the first needle valve 32, that is, the second flow path 18, is relatively high (that is, the flow rate per unit time is large). That is, the operating speed (axial movement speed) of the piston 2b of the cylinder 2 becomes high.
- the pressure fluid stored in the cylinder chamber 20 of the speed controller 1 (1B) moves from the cylinder chamber 20 to the valve box 46e and the The gas flows through the two-needle valve 48 to the exhaust port 24 and is exhausted (sent out) to the outside of the main body 10.
- a decrease in the pressure fluid stored in the cylinder chamber 20, that is, a decrease in pressure acting on the one end 30 a side of the piston 30, causes the first biasing to act on the other end 30 b side of the piston 30.
- the biasing force of the member 42 is increased, and the piston 30 starts moving in the Y2 direction by the biasing force.
- the piston 30 and the needle shaft fixed to the piston 30 are adjusted by adjusting the flow rate (that is, the flow rate per unit time) of the pressure fluid flowing from the cylinder chamber 20 to the exhaust port 24 by the second needle valve 48. It is possible to adjust (control) the operation speed (axial movement speed) of Y in the Y2 direction. That is, when the flow rate of the pressure fluid passing through the fourth flow path 26 (more specifically, the second needle valve 48) is high (that is, the flow rate per unit time is large), the piston 30 and the needle shaft 34 The operation speed (axial movement speed) becomes higher. On the other hand, when the flow rate of the pressure fluid is low (that is, the flow rate per unit time is small), the operating speed (axial moving speed) of the piston 30 and the needle shaft 34 is low.
- the tip end portion 34a of the needle shaft 34 fixed to the piston 30 comes into contact with, approaches, or enters the opening hole 28d to the predetermined position.
- an adjusting action as the first needle valve 32 that is, a throttle action of the passing flow rate occurs. More specifically, since the first needle valve 32 has a relatively small opening (a state in which a throttling action occurs), the flow velocity of the pressure fluid passing through the first needle valve 32, that is, the second flow path 18. Becomes relatively slow (that is, the flow rate per unit time is small). That is, the operating speed (axial movement speed) of the piston 2b of the cylinder 2 is low (switched from high speed to low speed).
- the operating speed of the cylinder 2 can be adjusted (controlled) in stages (here, in two stages of high speed and low speed).
- the predetermined position (stop position) in the Y2 direction of the piston 30 is defined and adjusted by the adjustable stopper 44 as described above.
- the flow rate (flow rate) of the pressure fluid passing through the fourth flow path 26 can be adjusted by adjusting the opening area of the second needle valve 48, that is, the flow rate (flow rate) of the passing pressure fluid. It becomes possible. Thereby, it becomes possible to adjust the operation speed (axial movement speed) of the main body 10 in the Y2 direction of the piston 30. Therefore, it is possible to adjust the timing at which the first flow rate of the first needle valve 32 starts to be reduced. That is, it is possible to adjust the timing at which the operation speed (axial movement speed) of the piston 2b of the cylinder 2 is switched from the high speed movement to the low speed movement to be advanced or delayed.
- the opening area of the first needle valve 32 that is, the flow velocity (flow rate) of the passing pressure fluid can be adjusted. Become. That is, it becomes possible to adjust the flow velocity (flow rate) of the pressure fluid passing through the second flow path 18. Accordingly, it is possible to adjust the moving speed on the low speed side after the operating speed (axial moving speed) of the piston 2b of the cylinder 2 is switched from the high speed movement to the low speed movement. That is, since the speed immediately before stopping the piston 2b can be adjusted to be reduced to a desired speed, it is possible to mitigate the impact at the time of stopping.
- the solenoid valve 4 is operated to switch the circuit and supply the pressure fluid to the speed controller 1 (1B) opposite to the above example. More specifically, pressurized fluid (for example, compressed air) is supplied from the external pressurized fluid supply source 3 to the first port 12 of the speed controller 1 (1B) via the flow path 60, the electromagnetic valve 4, and the flow path 68. What is necessary is just to supply.
- pressurized fluid for example, compressed air
- the pressure fluid supplied to the first port 12 of the speed controller 1 (1B) flows through the first flow path 16 and then flows through the first check valve 28 to the second port 14. Furthermore, it is supplied into the cylinder chamber of the cylinder 2 (here, the cylinder chamber 2a 2 on the other end 2b 2 side with respect to the piston 2b) via the flow path 66. As a result, the pressure of the pressurized fluid supplied into the cylinder chamber 2a 2 acts on the other end 2b 2 side of the piston 2b, so that the piston 2b is driven in the X2 direction.
- FIG. 3 is a drawing of a position corresponding to FIG. 1A described above.
- the second check valve 46 does not have the third check valve 47 inside, and a valve body 46 a configured to reciprocate in a valve box 46 e provided in the middle of the third flow path 22.
- the valve seat 46b is provided.
- the valve body 46a is formed using a rubber material such as NBR, and the valve seat 46b is formed using a resin material.
- the valve body 46a moves away from the valve seat 46b by the pressure of the pressure fluid,
- the flow path (third flow path 22) is also opened away from the inner wall of the third flow path 22.
- the valve body 46 a is moved to the third flow path by the pressure of the pressure fluid stored in the cylinder chamber 20. 22 abuts against the inner wall, moves toward the valve seat 46b, closely contacts the valve seat 46b, and closes the flow path (third flow path 22).
- the second check valve 46 has a structure that also serves as an on-off valve that opens and closes the fourth flow path 26. More specifically, a valve seat 46g for opening and closing the fourth flow path 26 is provided.
- valve body 46a of the second check valve 46 moves in the direction of opening the third flow path 22, the valve body 46a comes into close contact with the valve seat 46g and the fourth flow path 26 is closed.
- the valve body 46a of the second check valve 46 moves in the direction to close the third flow path 22, the valve body 46a is separated from the valve seat 46g and the fourth flow path 26 is opened.
- the disclosed speed controller it is possible to adjust (control) the operating speed (moving speed) in one stroke of the external cylinder 2 step by step (two steps). That is, the operating time can be shortened by moving the piston 2b of the cylinder 2 at a high speed for a while after the piston 2b starts to move, and at a desired timing before the piston 2b stops.
- the moving speed By switching the moving speed from high speed to low speed, it is possible to reduce the impact when the piston 2b of the cylinder 2 is stopped without using a shock absorber.
- the first check valve and the first needle valve are realized by a simple structure using common components, and it is possible to achieve cost reduction in both the component cost and the manufacturing cost.
- the third check valve is provided inside the valve body of the second check valve, when the flow of the pressure fluid from the first port side into the third flow path is stopped, the second urging member Due to this urging force, it is possible to solve the problem that the operation until the valve body is brought into close contact with the valve seat and the flow path is closed is not completed instantaneously. Therefore, since it is possible to promptly move to the next process in fluid control, the cycle time can be shortened. Furthermore, it is possible to reduce the size of the entire device and simplify the mechanism.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fluid-Pressure Circuits (AREA)
- Actuator (AREA)
Abstract
Description
次に、第2チェック弁46の変形例を図3に示す。ここで、図3は、前述の図1Aに対応する位置の図面である。以下、本変形例に特徴的な構成を中心に説明する。当該第2チェック弁46は、内部に第3チェック弁47を有しておらず、第3流路22の流路途中に設けられた弁箱46e内を往復動可能に構成された弁体46a、弁座46bを備えて構成されている。一例として、弁体46aは、NBR等のゴム材料を用いて形成され、弁座46bは、樹脂材料を用いて形成されている。
Claims (6)
- それぞれ本体部に設けられた第1ポートと第2ポートとを連通して圧力流体を通流させる第1流路および第2流路を備え、
前記第1流路には、前記第1ポートから前記第2ポートへ向かう通流のみを許容する第1チェック弁が設けられ、
前記第2流路には、通流する圧力流体の流量を調整する第1ニードル弁が設けられ、
前記第2流路は、前記第1チェック弁の径方向中央位置に開口する開口孔を流路の一部として構成され、
前記第1ニードル弁は、前記本体部に設けられたシリンダ室内に往復動可能に配設されるピストンに固定され且つ該シリンダ室外に突出させたニードル軸の先端部を、前記開口孔に当接、近接、もしくは進入させて該開口孔の開口面積を変化させることにより流量の調整を行い、
前記第1ポートと前記シリンダ室とを連通して圧力流体を通流させる第3流路をさらに備え、
前記第3流路には、前記第1ポートから前記シリンダ室へ向かう通流のみを許容する第2チェック弁が設けられていること
を特徴とするスピードコントローラ。 - 前記シリンダ室と前記本体部に設けられた排気口とを連通して圧力流体を通流させる第4流路をさらに備え、
前記第2チェック弁は、前記第3流路を開通する方向に弁体が移動することによって前記第4流路を閉鎖し、前記第3流路を閉鎖する方向に前記弁体が移動することによって前記第4流路を開通する、前記第4流路の開閉弁を兼ねていること
を特徴とする請求項1記載のスピードコントローラ。 - 前記第3流路は、流路の途中部分が前記第2チェック弁の前記弁体の内部を通過するように形成されており、
前記弁体には、内部に形成された前記第3流路において前記第1ポートから前記シリンダ室へ向かう通流のみを許容する第3チェック弁が設けられていること
を特徴とする請求項2記載のスピードコントローラ。 - 前記第4流路には、通流する圧力流体の流量を調整する第2ニードル弁が設けられていること
を特徴とする請求項2または請求項3記載のスピードコントローラ。 - 前記シリンダ室内の容積を減少させる方向で、且つ、前記ニードル軸の先端部を前記開口孔に当接、近接、もしくは進入させる方向に、前記ピストンを移動させる移動部材を備えることを特徴とする請求項1~4のいずれか一項に記載のスピードコントローラ。
- 前記移動部材によって前記ピストンを移動させる際に、前記ニードル軸の先端部が前記開口孔に対して所定位置を超えて当接、近接、もしくは進入しないように該ピストンの停止位置を規定すると共に該停止位置の調整が可能な調整部材を備えること
を特徴とする請求項5記載のスピードコントローラ。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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CN201580038116.7A CN106537013B (zh) | 2014-08-01 | 2015-07-06 | 速度控制器 |
US15/310,282 US10247208B2 (en) | 2014-08-01 | 2015-07-06 | Speed controller |
EP15827235.1A EP3176482B1 (en) | 2014-08-01 | 2015-07-06 | Speed controller |
KR1020177000026A KR20170038781A (ko) | 2014-08-01 | 2015-07-06 | 스피드 컨트롤러 |
Applications Claiming Priority (4)
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JP2014157770A JP5756984B1 (ja) | 2014-08-01 | 2014-08-01 | スピードコントローラ |
JP2014-157770 | 2014-08-01 | ||
JP2015-040833 | 2015-03-03 | ||
JP2015040833A JP6047796B2 (ja) | 2015-03-03 | 2015-03-03 | スピードコントローラ |
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US (1) | US10247208B2 (ja) |
EP (1) | EP3176482B1 (ja) |
KR (1) | KR20170038781A (ja) |
CN (1) | CN106537013B (ja) |
TW (1) | TWI604132B (ja) |
WO (1) | WO2016017377A1 (ja) |
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WO2018203460A1 (ja) * | 2017-05-02 | 2018-11-08 | 有限会社浜インターナショナル | スピードコントローラ |
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JP6959485B2 (ja) | 2016-06-23 | 2021-11-02 | Smc株式会社 | スピードコントローラ |
JP6751911B2 (ja) | 2016-11-18 | 2020-09-09 | Smc株式会社 | 流体圧機器のポートに直接取り付ける複合弁 |
JP2019159784A (ja) * | 2018-03-13 | 2019-09-19 | 大電株式会社 | 流量調整弁 |
CN108194443B (zh) * | 2018-03-13 | 2019-07-09 | 中铁隧道局集团有限公司 | 一种用于盾构机的速度集成装置 |
ES2754721B2 (es) * | 2018-10-16 | 2021-07-07 | Comercial De Utiles Y Moldes Sa | Cilindro para moldes |
JP6960585B2 (ja) * | 2018-12-03 | 2021-11-05 | Smc株式会社 | 流量コントローラ及びそれを備えた駆動装置 |
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- 2015-07-06 CN CN201580038116.7A patent/CN106537013B/zh not_active Expired - Fee Related
- 2015-07-06 KR KR1020177000026A patent/KR20170038781A/ko unknown
- 2015-07-06 EP EP15827235.1A patent/EP3176482B1/en not_active Not-in-force
- 2015-07-06 US US15/310,282 patent/US10247208B2/en not_active Expired - Fee Related
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Also Published As
Publication number | Publication date |
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TWI604132B (zh) | 2017-11-01 |
EP3176482B1 (en) | 2019-01-02 |
CN106537013A (zh) | 2017-03-22 |
TW201615993A (zh) | 2016-05-01 |
KR20170038781A (ko) | 2017-04-07 |
EP3176482A1 (en) | 2017-06-07 |
EP3176482A4 (en) | 2018-04-18 |
CN106537013B (zh) | 2019-01-08 |
US10247208B2 (en) | 2019-04-02 |
US20170261008A1 (en) | 2017-09-14 |
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