WO2013157601A1 - 駆動軸へのダイヤフラムの固定構造及び駆動軸へのダイヤフラムの固定方法 - Google Patents
駆動軸へのダイヤフラムの固定構造及び駆動軸へのダイヤフラムの固定方法 Download PDFInfo
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- WO2013157601A1 WO2013157601A1 PCT/JP2013/061479 JP2013061479W WO2013157601A1 WO 2013157601 A1 WO2013157601 A1 WO 2013157601A1 JP 2013061479 W JP2013061479 W JP 2013061479W WO 2013157601 A1 WO2013157601 A1 WO 2013157601A1
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- diaphragm
- needle
- protrusion
- drive shaft
- insertion hole
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/001—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass valves or valve housings
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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
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0644—One-way valve
- F16K31/0655—Lift valves
- F16K31/0658—Armature and valve member being one single element
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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
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0644—One-way valve
- F16K31/0655—Lift valves
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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
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49405—Valve or choke making
- Y10T29/49412—Valve or choke making with assembly, disassembly or composite article making
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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
- Y10T29/00—Metal working
- Y10T29/53—Means to assemble or disassemble
Definitions
- the present invention relates to a structure for fixing a diaphragm to a drive shaft and a fixing method for fixing a flexible diaphragm embedded with a base fabric to an end portion of the drive shaft.
- the pressure difference between the pressure equalizing chamber connected to the primary chamber on the high pressure side and the low pressure chamber connected to the low pressure secondary chamber is applied to the valve rod through the diaphragm.
- the differential pressure between the chamber and the secondary chamber cancels (cancels) the force acting on the valve body of the valve stem.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2011-169415
- a valve stem having a valve body is disposed in a valve housing, the valve stem is displaced in the axial direction by electromagnetic force generated by energization of an electromagnetic coil, and the valve port is opened by the valve body. The degree is adjusted.
- this electromagnetic control valve is provided with a primary chamber that communicates with the inlet port on one side of the valve port and accommodates the valve body, and a secondary chamber that communicates with the outlet port on the other side of the valve port. It has been.
- a pressure equalizing chamber that communicates with the primary chamber by a pressure equalizing passage is provided on the secondary chamber side, and the pressure in the pressure equalizing chamber is configured to act on the valve rod via the diaphragm. The force acting on the valve body is canceled by the pressure difference from the side pressure.
- this pressure balance type electromagnetic control valve is not affected by the differential pressure between the primary chamber side pressure and the secondary chamber side pressure, and maintains a constant valve opening at a constant current. It becomes possible to control the flow rate.
- FIG. 10 is a schematic enlarged view of the main part of the conventional electromagnetic control valve, its assembly process, and the central part of the diaphragm.
- a connecting rod c having a cylindrical tip is formed at the end of the piston portion b in the valve housing a.
- the diaphragm d is obtained by embedding a base fabric d1 in a rubber layer d2, and a hole d3 is formed in the center.
- a through hole d3 in the center of the diaphragm d is passed through the connecting rod c of the piston portion b, and as shown in FIG. 10 (B), a diaphragm guide e is inserted into the connecting rod c, and the lower end of the connecting rod c The diaphragm d is fixed to the piston part b. Then, the diaphragm retainer f is fitted to the lower end portion of the valve housing a, and the lower end of the valve housing a is caulked as shown in FIG. 10C.
- Such a conventional assembling method has the following problems. Since a hole d3 is formed in the center of the diaphragm d for fixing to the piston part b, as a result, as shown in FIG. 10 (D), a hole is also formed in the base fabric d1 in the diaphragm d. d3 'is empty and the base fabric d1 (its fibers) is cut. Generally, in a rubber diaphragm or the like, the rubber layer d2 has airtightness, and the base fabric d1 has pressure resistance.
- the pressure resistance strength of the diaphragm d depends on the strength of the base fabric d1
- the rubber layer d2 is stretched and the base fabric d1 is also pulled by being pressurized.
- the pressure resistance of the diaphragm d is remarkably lowered, and when the diaphragm d is damaged, the primary chamber side pressure acting on the valve body and the secondary chamber The force due to the differential pressure from the side pressure cannot be canceled.
- the present invention has been made in order to solve the above-described problems, and has improved the structure for fixing the diaphragm to the drive shaft so as to cancel the force acting on the valve body due to the differential pressure using the diaphragm, for example.
- An object of the present invention is to improve the pressure resistance and durability of the diaphragm in the electromagnetic control valve.
- the structure for fixing a diaphragm to a drive shaft according to claim 1 is a structure for fixing a diaphragm to a drive shaft for fixing a flexible diaphragm embedded with a base fabric to the drive shaft, and the diaphragm together with the drive shaft.
- a diaphragm guide for holding is provided, one of the drive shaft and the diaphragm guide is formed with a needle-like protrusion, and the other is formed with an insertion hole through which the needle-like protrusion is inserted, and the needle-like protrusion has a center of the diaphragm And the needle-like protrusion is penetrated through the diaphragm, and the needle-like protrusion and the insertion hole are fixed to fix the diaphragm to the drive shaft.
- the structure for fixing the diaphragm to the drive shaft according to claim 2 is the structure for fixing the diaphragm to the drive shaft according to claim 1, wherein the needle-like protrusion is formed on the drive shaft, and the insertion hole is the diaphragm. It is formed in a guide, and the needle-like projection is inserted into the insertion hole, and the tip of the needle-like projection is welded to fix the needle-like projection and the insertion hole.
- the structure for fixing the diaphragm to the drive shaft according to claim 3 is the structure for fixing the diaphragm to the drive shaft according to claim 1, wherein the needle-like protrusion is formed in the diaphragm guide, and the insertion hole is formed in the drive shaft.
- the needle-like protrusion and the insertion hole are fixedly formed by press-fitting the needle-like protrusion into the insertion hole.
- a method for fixing a diaphragm to a drive shaft according to claim 4 is a method for fixing a diaphragm to a drive shaft for fixing a flexible diaphragm embedded with a base fabric to the drive shaft, the diaphragm being attached together with the drive shaft.
- the diaphragm guide to be sandwiched, one of the drive shaft and the diaphragm guide is formed with a needle-like projection, and the other is formed with an insertion hole through which the needle-like projection is inserted.
- the needle-like protrusion is penetrated through the diaphragm by piercing the center, and the needle-like protrusion and the insertion hole are fixed to fix the diaphragm to the drive shaft.
- the method for fixing the diaphragm to the drive shaft according to claim 5 is the method for fixing the diaphragm to the drive shaft according to claim 4, wherein the needle-like protrusion is formed on the drive shaft, and the needle-like protrusion is The needle-shaped cap at the tip is removable, the insertion hole is formed in the diaphragm guide, and the needle-shaped cap is inserted into the needle-shaped cap of the needle-shaped protrusion so that the needle-shaped protrusion penetrates the diaphragm. It is characterized by that.
- the method for fixing the diaphragm to the drive shaft according to claim 6 is the method for fixing the diaphragm to the drive shaft according to claim 5, wherein the needle-like protrusion is passed through the diaphragm, and then the needle-like protrusion is inserted.
- the needle-like cap is inserted into the insertion hole of the diaphragm guide, the needle-like cap is removed, the tip of the needle-like projection from which the needle-like cap has been removed is caulked or welded, and the needle-like projection and the insertion hole And are fixed.
- the needle-like protrusion even if the needle-like protrusion is pierced with the diaphragm, the needle-like protrusion only passes through the gap of the fiber of the base fabric, and the hole like a punched hole is formed in the base fabric. Is not formed, and the base fabric (its fibers) is not cut. Therefore, the pressure resistance and durability of the diaphragm can be improved.
- the needle-like protrusion and the diaphragm guide can be firmly fixed by welding.
- the structure for fixing the diaphragm to the drive shaft in addition to the effect of the first aspect, it is only necessary to press-fit the diaphragm guide to the drive shaft side. Moreover, the needle-like projections of the diaphragm guide can be thickened to make the diaphragm fixing structure robust.
- the same effect as in the second aspect can be obtained, and the structure for fixing the diaphragm can be made robust by thickening the needle-like protrusions.
- the method for fixing the diaphragm to the drive shaft in addition to the effect of the fifth aspect, when the diaphragm guide is inserted into the needle-like protrusion, there is a needle-like cap, so that the diaphragm guide can be easily inserted. An effect is obtained. Further, since the needle-shaped cap is removed and caulking or welding is performed, caulking and welding can be easily performed while thickening the needle-shaped projections and making the diaphragm fixing structure robust.
- FIG. 1 is a longitudinal sectional view of a solenoid control valve according to a first embodiment to which the present invention is applied in a closed state.
- the electromagnetic control valve 10 of this embodiment is provided in the piping of the fuel cell system, the fluid flowing in the piping of the fuel cell system is high pressure and the pressure fluctuation is severe.
- the electromagnetic control valve 10 of this embodiment has a valve housing 1.
- the valve housing 1 includes a high pressure side inlet port 1a through which fluid flows, a low pressure side outlet port 1b through which fluid flows out, a primary chamber 11 communicating with the inlet port 1a, a secondary chamber 12 communicating with the outlet port 1b, a primary A valve port 13 that communicates the chamber 11 and the secondary chamber 12 is provided.
- the valve port 13 has a circular horizontal cross-sectional shape, and a ring-shaped valve seat member 14 is disposed in the opening on the primary chamber 11 side.
- valve rod 2 is extended as a “drive shaft” that can be displaced in a direction along the axis L.
- the valve rod 2 includes a columnar valve body 21 that is located in the primary chamber 11 and can be separated from and connected to the valve seat member 14, a connecting rod 22 that extends below the valve body 21, and a connecting rod 22.
- a piston portion 23 connected to the valve body 21 and a connecting rod 24 extending above the valve body 21 are provided.
- the valve seat member 14 may be eliminated so that only the primary chamber side opening of the valve port 13 is provided, and a seal member equivalent to the valve seat member 14 may be provided around the lower end of the valve body 21.
- the valve body 21 sets the opening degree of the valve port 13 based on the positional relationship with the valve seat member 14 determined by the displacement of the valve stem 2 in the direction along the axis L.
- the pressure in the primary chamber 11 is higher than the pressure in the secondary chamber 12, and a differential pressure between the pressure in the primary chamber 11 and the pressure in the secondary chamber 12 acts on the valve body 21, and the valve body 21 is closed. Receive force in the direction.
- the force that this differential pressure acts on the valve body 21 is determined by the inner diameter of the valve port 13 (the effective pressure receiving diameter of the valve body 21).
- a pressure equalizing chamber 15 is formed at the lower end of the valve housing 1, and the pressure equalizing chamber 15 is communicated with the primary chamber 11 via the inlet port 1a by a pressure equalizing introduction path 16 formed in the housing (not shown). ing.
- a pressure balance unit 17 is configured in the pressure equalizing chamber 15. The pressure balance portion 17 is fitted into a communication hole 17a formed in the valve housing 1, a low pressure chamber 17b communicated with the secondary chamber 12 by the communication hole 17a, and a space on the pressure equalizing chamber 15 side. And a rubber diaphragm 3 in which the base fabric 3A disposed in this manner is embedded in the rubber layer 3B.
- the diaphragm 3 has a convolution part 31, and this convolution part 31 is a rotating body around the axis L and bulges into the low pressure chamber 17 b on the outer periphery of the piston part 23. Further, the diaphragm 3 has a cylindrical boss portion 32, and a concave portion 32 a is formed at the center of the boss portion 32 to fit a needle-like protrusion 231 described later.
- the piston portion 23 of the valve stem 2 is inserted into the communication hole 17a without contacting the communication hole 17a.
- a needle-like protrusion 231 is formed at the lower end of the piston portion 23.
- an insertion hole 17c1 through which the needle-like protrusion 231 is inserted is formed in the diaphragm guide 17c that sandwiches the diaphragm 3 together with the piston portion 23.
- the needle-like protrusion 231 of the piston portion 23 passes through the center of the recess 32a of the diaphragm 3, and the diaphragm guide 17c is fitted into the needle-like protrusion 231 through the insertion hole 17c1.
- the diaphragm 3 is fixed to the piston 23 by sandwiching the boss 32 of the diaphragm 3 between the diaphragm guide 17c and the piston 23 and spot-welding the tip of the needle-like protrusion 231.
- a diaphragm retainer 17d is fitted to the lower end portion of the valve housing 1, and the diaphragm retainer 17d and the diaphragm 3 are fixed by caulking the lower end of the valve housing 1.
- the diaphragm 3 has flexibility, and transmits the force generated by the differential pressure between the primary chamber side pressure and the secondary chamber side pressure acting on the pressure equalizing chamber 15 to the valve rod 2.
- the electromagnetic drive part 4 is provided in the upper part (primary chamber 11 side) of the valve housing 1.
- the electromagnetic drive unit 4 includes a cylindrical plunger tube 40, an attractor 42 made of a magnetic material fixed to the upper end of the plunger tube 40, and a winding wound around a bobbin 43a disposed on the outer periphery of the plunger tube 40.
- An electromagnetic coil 43 is provided.
- the plunger tube 40 and the suction element 42 are fixed by welding or the like.
- a plunger 5 is disposed inside the plunger tube 40, and a plunger spring 5 b is disposed between the plunger 5 and the valve body 21.
- the plunger 5 is made of a magnetic material and has a rotationally symmetric shape with the axis L as an axis, except for the vent hole 53 of the plunger 5.
- the suction element 42 and the plunger 5 are formed with insertion holes 41 and 51 coaxial with the axis L, respectively.
- the connecting rod 24 of the valve stem 2 is inserted into the insertion hole 51 of the plunger 5, and the cylindrical retaining member 7 made of a nonmagnetic material at the end of the connecting rod 24 in the insertion hole 41 of the attractor 42. Is inserted.
- the retaining member 7 and the end of the connecting rod 24 are fixed by welding.
- the retaining member 7 has a hook-like portion 71 at the end on the plunger 5 side, and this hook-like portion 71 is in contact with the opposite surface 5a on the suction element 42 side of the plunger 5 and sucks the opposite surface 5a. It is located between the opposed surface 4a on the plunger 5 side of the child 42.
- the plunger spring 5b is disposed in a compressed state with one end abutting against the inner bottom surface 52 of the plunger 5 and the other end abutting against the spring receiving portion 21a which is the end surface of the valve body 21 on the plunger 5 side. .
- the plunger 5 is in a state in which the opposing surface 5a is always in contact with the retaining member 7 (the hook-like portion 71), and when the plunger 5 is sucked in the direction of the attracting element 42, The valve stem 2 is displaced in the valve opening direction.
- the clearance between the insertion hole 51 of the plunger 5 and the connecting rod 24 of the valve stem 2 is set larger than the clearance between the plunger 5 and the plunger tube 40, and even if the plunger 5 is displaced in the direction perpendicular to the axis L, The valve stem 2 and the plunger 5 do not contact each other.
- the suction element 42 is formed with an adjustment portion hole 42a having a diameter larger than that of the insertion hole 41, and the setting adjustment portion 8 is disposed in the adjustment portion hole 42a.
- the setting adjustment unit 8 includes an adjustment screw 81, a spring receiver 82, an adjustment spring 83, and a ball 84.
- the adjustment spring 83 is disposed in a compressed state between the adjustment screw 81 and the spring receiver 82, and the ball 84 is disposed in the insertion hole 41 of the suction element 42 while being in contact with the spring receiver 82. .
- the adjustment spring 83 urges the ball 84 to come into contact with the upper end of the retaining member 7 via the spring receiver 82.
- the adjustment screw 81 is attached to the suction element 42 by screwing a male screw part 811 on the outer periphery thereof with a female screw part 42 b formed on the upper inner peripheral surface of the suction element 42.
- a slight clearance is provided between the ball 84 and the insertion hole 41 of the suction element 42, and the ball 84 can be displaced in the insertion hole 41 along the axis L.
- a cylindrical portion 72 having a thin cylindrical shape is formed at the end of the retaining member 7 on the ball 84 side, and the cylindrical portion 72 is in spherical contact with the ball 84. Thereby, the upper end of the retaining member 7 (and the valve stem 2) is always positioned on the axis L.
- the electromagnetic control valve of the embodiment operates as follows.
- the setting adjustment unit 8 urges the valve rod 2 toward the valve seat member 14 via the spring receiver 82, the ball 84, and the retaining member 7 by the adjustment spring 83.
- the plunger 5 is attracted by the attractor 42, and the valve stem 2 is displaced in a direction away from the valve seat member 14 against the biasing force of the adjustment spring 83, and the valve is closed and the valve is opened.
- the opening degree of the valve port 13 is controlled by the positional relationship between the valve body 21 and the valve seat member 14 in the direction along the axis L.
- the position where the plunger 5 is fully opened when the plunger 5 is at the uppermost end position is a position where the flange portion 71 of the retaining member 7 is in contact with the opposing surface 4 a of the suction element 42.
- the hook-shaped portion 71 serves as a stopper, thereby preventing the plunger 5 from being attracted (adhered) to the suction element 42.
- valve body 21 is seated on the valve seat member 14 and the valve is closed.
- the biasing force applied to the valve stem 2 by the adjustment spring 83 is adjusted by the amount of driving of the adjustment screw 81, and the electromagnetic force (suction force) necessary for opening the valve can be adjusted.
- the valve rod 2 is displaced in the direction along the axis L due to the balanced relationship between the electromagnetic force generated by the electromagnetic coil 43 and the spring force of the adjustment spring 83, and the opening degree of the valve port 13 is changed by the valve body 21.
- the differential pressure between the pressure in the primary chamber 11 and the pressure in the secondary chamber 12 acts on the valve body 21 to apply a force in the valve closing direction.
- the pressure equalizing chamber 15 communicates with the primary chamber 11 via the pressure equalizing introduction path 16, the differential pressure between the primary chamber side pressure acting on the pressure equalizing chamber 15 and the secondary chamber side pressure acting on the low pressure chamber 17b. Acts on the diaphragm 3, and a force in the valve opening direction is applied to the piston portion 23 of the valve stem 2.
- FIG. 2 is a cross-sectional view and a schematic plan view of the diaphragm 3 before being fixed to the valve stem 2.
- This diaphragm 3 is obtained by embedding a base fabric 3A in a rubber layer 3B, and a conventional hole is not formed at the center.
- 2B conceptually illustrates the yarn of the base fabric 3 with lines, but the base fabric 3 is flat knitted and the fibers (yarns) are tightly knitted as shown in FIG. .
- FIG. 4 is a view for explaining an assembly process of the main part of the electromagnetic control valve of the first embodiment, and the diaphragm 3 and the valve stem 2 are fixed as follows. As shown in FIG. 4A, the center of the diaphragm 3 is pierced into the needle-like protrusion 231 formed at the lower end of the piston portion 23, and the needle-like protrusion 231 is penetrated through the diaphragm 3. Further, the diaphragm guide 17c is inserted into the needle-like protrusion 231 through the insertion hole 17c1.
- the tip of the needle-like protrusion 231 is spot-welded, so that the needle-like protrusion 231 and the diaphragm guide 17c are fixed, and the diaphragm 3 is clamped together with the piston portion 23 (valve stem 2).
- the diaphragm retainer 17d is fitted to the lower end portion of the valve housing 1, and the diaphragm retainer 17d and the diaphragm 3 are fixed by caulking the lower end of the valve housing 1 as shown in FIG.
- the diaphragm 3 is inserted into the needle-like protrusion 231 to hold the diaphragm 3, so that the base fabric 3A of the diaphragm 3 is not cut.
- the needle-like projections 231 are stuck between the yarns of the base fabric 3A, and as shown in FIG. 3 (B), the needle-like projections 231 are formed on the base fabric 3A. Even in the case of being stabbed into the yarn, the base fabric 3A is not cut. Therefore, the pressure resistance and durability of the diaphragm 3 are improved.
- FIG. 5 is a longitudinal cross-sectional view of the electromagnetic control valve of the second embodiment to which the present invention is applied.
- needle-like projections 17c2 are formed in the diaphragm guide 17c, and insertion holes 232 through which the needle-like projections 17c2 are inserted are formed in the piston portion 23.
- the needle-like protrusion 17c2 is pierced in the center of the diaphragm 3, and the diaphragm 3 is passed through the needle-like protrusion 17c2.
- the diaphragm 3 is sandwiched by press-fitting the diaphragm guide 17c (needle-like protrusion 17c2) into the insertion hole 232 of the piston portion 23, whereby the diaphragm 3 is sandwiched together with the piston portion 23 (valve stem 2) by the diaphragm guide 17c.
- the outer diameter of the needle-like protrusion 17c2 before assembly is slightly larger than the inner diameter of the insertion hole 232, and the diaphragm guide 17c and the piston portion 23 are fixed by press-fitting.
- the pressure resistance and durability of the diaphragm 3 are improved as in the first embodiment.
- FIG. 6 is a longitudinal sectional view of the electromagnetic control valve of the third embodiment to which the present invention is applied
- FIG. 7 is a sectional view and a schematic plan view of the third embodiment before the diaphragm is fixed.
- a recess 32b having a diameter larger than that of the recess 32a of the first embodiment is formed in the boss portion 32.
- a needle-like protrusion 233 having a larger diameter (thickness) than the needle-like protrusion 231 in the first embodiment is formed at the lower end of the piston portion 23.
- the diaphragm guide 17c is formed with an insertion hole 17c3 having a diameter larger than that of the insertion hole 17c1 in the first embodiment.
- the needle-like protrusion (part thereof) 233 passes through the center of the recess 32b of the diaphragm 3, and the diaphragm guide 17c is fitted into the needle-like protrusion 233 through the insertion hole 17c3.
- the diaphragm 3 is fixed to the piston portion 23 by sandwiching the boss portion 32 of the diaphragm 3 between the diaphragm guide 17 c and the piston portion 23 and caulking the tip of the needle-like protrusion 233.
- FIG. 8 is a view for explaining the assembly process of the main part of the electromagnetic control valve of the third embodiment, and the diaphragm 3 and the valve stem 2 as the “drive shaft” are fixed as follows.
- a needle-like cap 233b is fitted as a part of the needle-like projection before assembly into the caulking hole 233a at the end of the needle-like projection 233 of the piston portion 23.
- the needle-shaped cap 233b and the needle-like protrusion 233 are pierced with the center of the diaphragm 3, and the needle-like cap 233b and the needle-like protrusion 233 are passed through the diaphragm 3.
- FIG. 8A a needle-like cap 233b is fitted as a part of the needle-like projection before assembly into the caulking hole 233a at the end of the needle-like projection 233 of the piston portion 23.
- the needle-shaped cap 233b and the needle-like protrusion 233 are pierced with the center of the diaphra
- the diaphragm guide 17c is inserted into the needle cap 233b and the needle projection 233 through the insertion hole 17c3. Then, as shown in FIG. 8C, the needle-like cap 233b is removed and the caulking hole 233a of the needle-like projection 233 is caulked to the outside, thereby fixing the needle-like projection 233 and the diaphragm guide 17c. 3 is clamped together with the piston part 23 (valve stem 2). Further, the diaphragm retainer 17d and the diaphragm 3 are fixed by fitting the diaphragm retainer 17d to the lower end portion of the valve housing 1 and caulking the lower end of the valve housing 1. Note that the caulking hole 233a of the needle-like protrusion 233 may be fixed by welding.
- the base cloth 3A of the diaphragm 3 may be cut even if the needle-like protrusion 233 has a large diameter. Absent. This is the same as the embodiment described with reference to FIG. 3, and the pressure resistance and durability of the diaphragm 3 are improved.
- the structure for fixing the diaphragm 3 is robust, for example, high durability even when used at a high pressure. Sex is obtained.
- the amount of protrusion from the insertion hole 17c3 of the diaphragm guide 17c becomes large.
- the needle cap 233b can be removed, the caulking and welding can be easily performed.
- the caulking hole 233a of the needle-like protrusion 233 is used for attaching the needle-like cap 233b, the attachment and removal of the needle-like cap 233b is facilitated.
- FIG. 9 is a longitudinal sectional view of the electromagnetic control valve of the fourth embodiment to which the present invention is applied.
- the diaphragm guide 17c has a diameter larger than that of the needle-like protrusion 17c2 in the second embodiment.
- a large (thick) needle-like protrusion 17c4 is formed, and an insertion hole 234 having a larger diameter than the insertion hole 232 in the second embodiment in which the needle-like protrusion 17c4 is inserted into the piston portion 23 is formed.
- the needle-like protrusion 17c4 is pierced in the center of the diaphragm 3, and the diaphragm 3 is passed through the needle-like protrusion 17c4.
- the diaphragm 3 is sandwiched by press-fitting the diaphragm guide 17c (needle-shaped protrusion 17c4) into the insertion hole 234 of the piston portion 23, whereby the diaphragm 3 is sandwiched together with the piston portion 23 (valve stem 2) by the diaphragm guide 17c. .
- the outer diameter of the needle-like protrusion 17c4 before assembly is slightly larger than the inner diameter of the insertion hole 234, and the diaphragm guide 17c and the piston portion 23 are fixed by press-fitting.
- the pressure resistance and durability of the diaphragm 3 are improved as in the above embodiment.
- the needle-like protrusion 17c4 is thicker than the needle-like protrusion 17c2 of the second embodiment, so that the structure for fixing the diaphragm 3 is robust, and, for example, high durability even when used at a high pressure. Sex is obtained.
- the drive shaft is not limited to the valve stem, but can be applied to other devices and other structures as long as the diaphragm is fixed to the drive shaft moved in the axial direction, and the diaphragm has high pressure resistance and durability. It is done.
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- Engineering & Computer Science (AREA)
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Abstract
Description
11 一次室
12 二次室
13 弁ポート
15 均圧室
16 均圧導入路
17 圧力バランス部
17a 連通孔
17b 低圧室
17c ダイヤフラムガイド
17c1 挿通穴
17d ダイヤフラム押さえ
2 弁棒(駆動軸)
21 弁体
22 連結ロッド
23 ピストン部
231 針状突起
3 ダイヤフラム
3A 基布
3B ゴム層
17c2 針状突起
232 挿通穴
17c3 挿通穴
233 針状突起
233b 針状キャップ
17c4 針状突起
234 挿通穴
4 電磁駆動部
Claims (6)
- 基布が埋設された可撓性のダイヤフラムを駆動軸に固定する駆動軸へのダイヤフラムの固定構造であって、
前記駆動軸と共に前記ダイヤフラムを挟持するダイヤフラムガイドを備え、前記駆動軸と前記ダイヤフラムガイドのうちの一方に針状突起が形成され、他方に該針状突起を挿通する挿通穴が形成され、前記針状突起に前記ダイヤフラムの中心を刺して該針状突起を該ダイヤフラムに貫通させるとともに、該針状突起と前記挿通穴とを固着して、前記ダイヤフラムを前記駆動軸に固定するようにしたことを特徴とする駆動軸へのダイヤフラムの固定構造。 - 前記針状突起が前記駆動軸に形成され、前記挿通穴が前記ダイヤフラムガイドに形成され、前記針状突起を前記挿通穴に挿通して該針状突起の先端を溶接し、該針状突起と前記挿通穴とを固着するようにしたことを特徴とする請求項1に記載の駆動軸へのダイヤフラムの固定構造。
- 前記針状突起が前記ダイヤフラムガイドに形成され、前記挿通穴が前記駆動軸に形成され、前記針状突起を前記挿通穴に圧入することで、該針状突起と前記挿通穴とを固着するようにしたことを特徴とする請求項1に記載の駆動軸へのダイヤフラムの固定構造。
- 基布が埋設された可撓性のダイヤフラムを駆動軸に固定する駆動軸へのダイヤフラムの固定方法であって、
前記駆動軸と共に前記ダイヤフラムを挟持するダイヤフラムガイドを用い、
前記駆動軸と前記ダイヤフラムガイドのうちの一方に針状突起を形成するとともに、他方に該針状突起を挿通する挿通穴を形成し、
前記針状突起に前記ダイヤフラムの中心を刺して該針状突起を該ダイヤフラムに貫通させ、該針状突起と前記挿通穴とを固着して、前記ダイヤフラムを前記駆動軸に固定するようにしたことを特徴とする駆動軸へのダイヤフラムの固定方法。 - 前記針状突起を前記駆動軸に形成するとともに、該針状突起の先端部分の針状キャップを取り外し可能にし、前記挿通穴を前記ダイヤフラムガイドに形成し、前記針状突起の前記針状キャップに前記ダイヤフラムの中心を刺して該針状突起を該ダイヤフラムに貫通させるようにしたことを特徴とする請求項4に記載の駆動軸へのダイヤフラムの固定方法。
- 前記針状突起を前記ダイヤフラムに貫通させた後、前記針状突起の前記針状キャップを前記ダイヤフラムガイドの挿通穴に挿通し、該針状キャップを取り外し、該針状キャップを取り外した前記針状突起の先端をかしめ、または溶接し、該針状突起と前記挿通穴とを固着するようにしたことを特徴とする請求項5に記載の駆動軸へのダイヤフラムの固定方法。
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JP2014511244A JP5913573B2 (ja) | 2012-04-19 | 2013-04-18 | 駆動軸へのダイヤフラムの固定構造及び駆動軸へのダイヤフラムの固定方法 |
CN201380020675.6A CN104246332A (zh) | 2012-04-19 | 2013-04-18 | 向驱动轴固定膜片的固定结构以及向驱动轴固定膜片的固定方法 |
US14/390,947 US20150059179A1 (en) | 2012-04-19 | 2013-04-18 | Structure fixing diaphragm to drive shaft and method for fixing diaphragm to drive shaft |
EP13778927.7A EP2840286A4 (en) | 2012-04-19 | 2013-04-18 | STRUCTURE FOR FIXING A MEMBRANE TO A DRIVE SHAFT AND METHOD FOR FIXING A MEMBRANE TO A DRIVE SHAFT |
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PCT/JP2013/061479 WO2013157601A1 (ja) | 2012-04-19 | 2013-04-18 | 駆動軸へのダイヤフラムの固定構造及び駆動軸へのダイヤフラムの固定方法 |
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JP2016035284A (ja) * | 2014-08-01 | 2016-03-17 | 株式会社鷺宮製作所 | 駆動軸へのダイヤフラムの固定構造及び駆動軸へのダイヤフラムの固定方法、ダイヤフラム及び電磁式制御弁 |
EP3118500A4 (en) * | 2014-03-13 | 2017-03-15 | Kabushiki Kaisha Saginomiya Seisakusho | Electromagnetic control valve |
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WO2013157292A1 (ja) * | 2012-04-19 | 2013-10-24 | 株式会社鷺宮製作所 | 電磁式制御弁及び電磁式制御弁の組立方法 |
JP6083711B2 (ja) * | 2014-09-01 | 2017-02-22 | 株式会社鷺宮製作所 | 駆動軸へのダイヤフラムの固定構造及び電磁式制御弁 |
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JP5913573B2 (ja) | 2016-04-27 |
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WO2013157292A1 (ja) | 2013-10-24 |
JPWO2013157601A1 (ja) | 2015-12-21 |
CN104246332A (zh) | 2014-12-24 |
US20150059179A1 (en) | 2015-03-05 |
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