JP4401276B2 - Pressure control valve - Google Patents

Description

  The present invention relates to a pressure control valve in which a valve element opens and closes a valve opening according to the pressure of a fluid.

Conventionally, as this type of pressure control valve, a valve having a bellows that expands and contracts according to the pressure of the fluid, and that opens and closes the valve port by directly moving the valve body by the expansion and contraction of the bellows is known (for example, , See Patent Document 1).
JP 2001-153256 A (paragraphs [0020], [0022], FIG. 1)

  However, since the bellows is an expensive part, development of a pressure control valve provided with an inexpensive pressure-sensitive member instead of the bellows has been demanded. Therefore, a pressure control valve provided with a diaphragm as a pressure sensitive member can be considered. Specifically, there is a configuration in which the abutting member is abutted against the diaphragm, and the valve body is directly moved using the elastic force of the diaphragm applied to the abutting member.

  Incidentally, it is generally known that concentric circular ridges are formed on a diaphragm in order to increase the amount of deformation of the diaphragm with respect to pressure change. In this case, when the abutting member is abutted at a position deviated from the center of the circular rod of the diaphragm, the diaphragm is inclined with respect to the axial direction of the abutting member, and the elastic force of the diaphragm becomes unstable. As a result, the opening / closing operation of the valve opening by the valve body also becomes unstable. Therefore, it has been difficult to use a diaphragm as an inexpensive pressure-sensitive member that replaces the bellows.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a pressure control valve that includes a diaphragm and that can stably open and close the valve opening by the valve body.

The pressure control valve (10, 89, 90, 91, 100 ) according to the invention of claim 1 made to achieve the above object is a body in which the valve body (33, 53 ) is assembled so as to be capable of linear movement. (1 1) and an opening of the body (1 1) which is formed on pressure detection room (28), one end of a bottom in the cylindrical pressure sensing cylindrical member (4 2), the pressure sensing cylindrical member (4 2) The diaphragm (44) that is stretched at the end and elastically deforms according to the pressure in the pressure detection chamber (28), and abuts against the diaphragm (44), and the valve body (33 according to the elastic deformation of the diaphragm (44). , provided with stop members (50, 50 V) for causing linear motion of the 5 3), and a valve port (39) that is opened and closed by the body (1 1) formed in the valve body (33,5 3) in the pressure control valve (10,89,90,91,10 0), the pressure sensing cylindrical member (42 Is accommodated in the pressure sensing chambers (28), a diaphragm (44) which is formed in a circular pleats (44A), the central abutment portion provided at the center of the circular folds (44A) of the diaphragm (44) (44D ), A taper-shaped centering protrusion (50A) formed on one of the abutting member (50, 50 V) and the center contact part (44D), and an abutting member (50, 50 V) And the center abutting portion (44D) is formed on the other side so as to receive the centering projection (50A) and align the shaft core of the abutting member (50, 50 V) with the center of the diaphragm (44). A guiding center recess (44B, 65A) and a valve port (39) on the side away from the pressure detection chamber (28) formed through the wall of the body (11) surrounding the pressure detection chamber (28). The provided shaft hole (16) and the shaft hole (16) are inserted into the valve port ( 39) A connecting shaft having a valve body (33, 53) at one end protruding from 39) and a bottom wall (42T) of the pressure-sensitive cylinder member (42) fixed to the other end protruding into the pressure detection chamber (28). (32, 51, 62), valve body closing biasing means (22, 46, 46V) for biasing the valve body (33, 53) toward the opening edge of the valve port (39), and a shaft hole ( 16) between the branch hole (17) branched from the middle part of the shaft 16 and the inner surface of the shaft hole (16) closer to the pressure detection chamber (28) than the branch hole (17) and the connecting shaft (32, 51, 62). A terminal wall (80) that seals the gap between the end wall and the end wall (50, 50V) that is provided at a position facing the diaphragm (44) of the body (11) and holds the base end of the abutting member (50, 50V) 24, 24V), and the fluid pressure (Ps) in the pressure detection chamber (28) is lower than a predetermined reference pressure. When the valve body (33, 53) opens the valve port (39) and the fluid pressure (Ps) in the pressure detection chamber (28) becomes higher than a predetermined reference pressure, the valve body (33 , 53) are configured to close the valve opening (39) .

The invention of claim 2 is the pressure control valve (10, 89, 90, 91, 100 ) according to claim 1, wherein the outer surface of the centering protrusion (50A) and / or the centering recess (44B, 65A). It has a feature that the shape of the inner surface is substantially hemispherical.

A third aspect of the present invention, the pressure control valve (10,90,91,10 0) according to claim 1 or 2, accommodates the inner contact plate (63) to the pressure sensing cylindrical member (4 2) in the The inner contact plate (63) is brought into close contact with the inner surface of the diaphragm (44), and the portions of the diaphragm (44) and the inner contact plate (63) that are in close contact with each other are depressed to form a centering recess (44B). Has characteristics.

A fourth aspect of the present invention, the pressure control valve (8 9) according to claim 1 or 2, the diaphragm of which the outer surface (44) stop members (50, 50 V) outer contact plate to the abutted portion (65) is brought into close contact, and a centering recess (65A) is formed in the outer contact disk (65).

A fifth aspect of the present invention, the pressure control valve (8 9) of claim 4, accommodates the inner contact plate (63) to the pressure sensing cylindrical member (4 2), the inner contact plate (63) The diaphragm (44) is brought into close contact with the inner surface of the diaphragm (44), and the diaphragm (44) is sandwiched between the inner contact board (63) and the outer contact board (65), and the inner contact board (63) and the outer contact board (65). Is characterized by the provision of concave and convex engaging portions (63A and 65B) that are concave and convex engaged with the diaphragm (44) sandwiched therebetween.

The invention of claim 6 is the pressure control valve (10, 89, 90, 91, 100) according to any of claims 1 to 5, wherein the abutting member (50, 50V) is characterized in that a fixing hole (24A) in which a base end portion (50B) is fitted and fixed is formed.

The invention according to claim 7 is the pressure control valve (10, 89, 90, 91, 100) according to any one of claims 1 to 6, wherein the connecting shaft (32, 51, 62) is connected from the pressure-sensitive cylinder member (42). ) And a cylindrical plunger (46, 46V) in which the abutting member (50, 50V) is inserted in the center, and a solenoid capable of applying an axial force by magnetic force to the plunger (46, 46V) (22), and the valve body closing / urging means (22, 46, 46V) is constituted by the plunger (46, 46V) and the solenoid (22).

The invention of claim 8 is the pressure control valve (10, 89, 90, 91) according to claim 7 , comprising a connecting shaft (32, 51, 62) and a plunger (46), and with respect to the body (11). Tilt restricting portions (19D, 46T) for restricting the tilting of the movable shaft portion (30) by partially narrowing the gap between the side surface of the movable shaft portion (30) that linearly moves and the inner surface of the body (11). ) Is provided at two locations on both ends of the movable shaft portion (30).

A ninth aspect of the present invention is the pressure control valve (100) according to the seventh aspect , wherein the movable shaft includes a connecting shaft (32, 51, 62) and a plunger (46V) and moves linearly with respect to the body (11). The portion (30) is characterized in that the shaft hole sealing member (80) restricts the tilting of the center abutting portion (44D) as a fulcrum.

The invention of claim 10 is characterized in that, in the pressure control valve (100) of claim 9 , the length of the plunger (46V) is half or less than that of the solenoid (22).

The invention of claim 11 is the pressure control valve (10, 89, 90, 91, 100) according to any one of claims 1 to 10 , wherein the valve element (33, 53) closes the valve port (39). It is characterized in that it is provided with adjusting means (32N, 33N, 51N, 52N, 60N, 61N) for adjusting the distance between the terminal wall (24, 24V) and the diaphragm (44) in the state.

The invention of claim 12 is the pressure control valve (10,89,100) according to claim 11, the valve body (33, 53) are contact shaft (32) is a cylindrical shape that penetrates the valve body ( 33, 53) and the connecting shaft (32) are provided with male and female screw portions (32N, 33N), and the adjusting means (32N, 33N) is constituted by the male and female screw portions (32N, 33N). Has characteristics.

According to a thirteenth aspect of the present invention, in the pressure control valve (90) according to the eleventh aspect , the pressure-sensitive cylinder member (42) and the connecting shaft (51) are separated, and the pressure-sensitive cylinder member (42) The connecting shaft (51) is provided with male and female screw portions (51N, 52N) which are screwed together, and the adjusting means (51N, 52N) is constituted by the male and female screw portions (51N, 52N).

According to a fourteenth aspect of the present invention, in the pressure control valve (91) according to the eleventh aspect , the connecting shaft (62) extends from the pressure-sensitive cylinder member (42) to a middle portion in the shaft hole (16). The connecting shaft constituting portion (60) and the second connecting shaft constituting portion (61) integrally formed with the valve body (33, 53) and extending to a middle portion in the shaft hole (16) are provided. The two connecting shaft constituent parts (60, 61) are provided with male and female screw parts (60N, 61N) which are screwed together, and the adjusting means (60N, 61N) is constituted by the male and female screw parts (60N, 61N). It has the characteristics.

According to a fifteenth aspect of the present invention, in the pressure control valve (10, 89, 90, 91, 100) according to any of the eleventh to fourteenth aspects, the body (11) is divided and press-fitted to the divided portions. A fitting portion (13K, 25K) to be combined is provided, and the adjusting means (13K, 25K) is configured by the fitting portion (13K, 25K).

[Invention of Claim 1]
According to the structure of claim 1, the abutting member (50, 50 V) is formed at the center of the circular flange (44A) of the diaphragm (44) by the centering protrusion (50A) and the centering recess (44B, 65A ). Is positioned, the axial force from the abutting member (50, 50 V) is applied to the center of the circular rod (44A), and the circular rod (44A) is uniformly deformed over the entire circumference, so that the diaphragm (44) The elasticity of the is stabilized. Thereby, the opening / closing operation | movement of the valve opening (39) by a valve body (33,53 ) is stabilized. Moreover, in the pressure control valve (10, 89, 90, 91, 100) of the present invention, the diaphragm (44) is provided inside the pressure detection chamber (28), and the center abutting portion ( 44D) and the end wall (24, 24V) provided on the body (11), the abutting member (50, 50V) is in a stretched state. Here, the diaphragm (44) is elastically deformed by receiving the fluid pressure (Ps) in the pressure detection chamber (28), and the end wall (24) as the fluid pressure (Ps) in the pressure detection chamber (28) decreases. , 24V) and the reaction force received from the abutting member (50, 50V) increases. When the fluid pressure (Ps) in the pressure detection chamber (28) becomes lower than a predetermined reference pressure, the valve element (33) is caused by the reaction force received by the diaphragm (44) from the abutting member (50, 50V). 53) moves to the open side, the valve port (39) is opened, and fluid flows from the branch hole (17) to the valve port (39).

[Invention of claim 2]
In the configuration of claim 2, stress concentration is prevented because both the outer surface of the centering protrusion (50A) and / or the inner surface of the centering recess (44B, 65A) are substantially hemispherical surfaces.

[Invention of claim 3]
According to the third aspect of the present invention, the diaphragm (44) is reinforced by bringing the inner contact board (63) into close contact with the inner surface of the diaphragm (44).

[Invention of claim 4]
In the fourth aspect of the present invention, the diaphragm (44) is reinforced by bringing the outer contact board (65) into close contact with the outer surface of the diaphragm (44).

[Invention of claim 5]
In the structure of claim 5, the diaphragm (44) is sandwiched between the inner contact board (63) and the outer contact board (65), and the unevenness provided on the inner contact board (63) and the outer contact board (65). Since the joint portions (63A, 65B) are engaged with each other with the diaphragm (44) interposed therebetween, the assembly accuracy between the outer contact plate (65) and the diaphragm (44) can be improved.

[Invention of claim 6 ]
According to the configuration of claim 6, the abutting member (50, 50V) is fitted by fitting the base end portion of the abutting member (50, 50V) into the fixing hole (24A) of the terminal wall (24, 24V). The proximal end portion of this is held and positioned.

[Invention of Claim 7 ]
In the structure of Claim 7, the urging | biasing force for closing a valve body (33, 53) can be changed easily by changing the excitation state of a solenoid (22).

[Invention of Claim 8 ]
In the structure of Claim 8 , the inclination of a movable shaft part (30) is controlled by the tilt control part (19D, 46T) provided in the both ends of the movable shaft part (30), and a movable shaft part (30) moves linearly. The sliding resistance at the time is suppressed, and the opening / closing operation of the valve port (39) by the valve body (33, 53) is stabilized.

[Invention of claim 9 ]
According to the configuration of the ninth aspect , when the movable shaft portion (30) is tilted with the center contact portion (44D) as a fulcrum, it is prevented from contacting the portion other than the shaft hole seal member (80). Thus, the sliding resistance when the movable shaft portion (30) moves linearly can be limited to the sliding contact resistance between the movable shaft portion (30) and the seal member (80). Here, since the movable shaft portion (30) and the seal member (80) are in sliding contact even in the regular assembled state, the sliding contact resistance between the regular assembled state and the movable shaft portion (30) is inclined. Can be suppressed.

[Invention of Claim 10 ]
According to the configuration of the tenth aspect , since the length of the plunger (46V) is less than half of the solenoid (22), the length of the plunger (46V) is more than half of the solenoid (22). The change in the magnetic attractive force between the terminal wall (24V) and the plunger (46V) can be suppressed between the normal assembled state and the state where the movable shaft portion (30) is tilted and assembled.

[Invention of Claim 11 ]
According to the configuration of the eleventh aspect , even if the assembling variation occurs in the distance between the terminal wall (24, 24V) and the diaphragm (44) in the state where the valve body (33, 53) is closed, the adjusting means (32N , 33N, 51N, 52N, 60N, 61N), the distance between the end walls (24, 24V) and the diaphragm (44) is changed, and the impact of the diaphragm (44) against the abutting member (50, 50V) is changed. The power can be adjusted. Thereby, the dispersion | variation in the correspondence of the fluid pressure (Ps) in a pressure detection chamber (28) and opening / closing of a valve body (33, 53) can be suppressed.

[Inventions of Claims 12 , 13 , 14 ]
In the pressure control valve according to claim 12 (10,89,100), the valve body (33) and the threaded portion of the contact shaft (32) (32N, 33N) by changing the screwing depth of each other, end wall ( 24, 24V) and the distance between the diaphragm (44) can be adjusted. In the pressure control valve (90) of the thirteenth aspect, by changing the screwing depth between the screw parts (51 N, 52 N) of the pressure-sensitive cylinder member (42) and the connecting shaft (51), the end wall ( The distance between 24) and the diaphragm (44) can be adjusted. Furthermore, in the pressure control valve (91) of the fourteenth aspect , by changing the screwing depth between the screw parts (60N, 61N) of the first and second connecting shaft constituting parts (60, 61), the terminal end is obtained. The distance between the wall (24) and the diaphragm (44) can be adjusted.

[Invention of Claim 15 ]
In the pressure control valve (10, 89, 90, 91, 100) of claim 15 , by changing the press-fitting depth of the fitting portion (13K, 25K) provided in the divided portion of the body (11). The distance between the end wall (24, 24V) and the diaphragm (44) can be adjusted.

[First Embodiment]
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. The pressure control valve 10 according to the present embodiment is configured such that a movable shaft portion 30 is accommodated in a shaft-like body 11 extending in the vertical direction in FIG. The body 11 can be divided into a distal end body 13 and a proximal end body 20 with an axial intermediate portion as a flange.

  The distal end body 13 has a cylindrical structure in which the outer diameter gradually decreases as the distance from the proximal end body 20 increases. Concave portions 15A and 15B are formed on both end surfaces of the tip body 13, and a shaft hole 16 is formed through the center portion of the tip body 13 so as to connect the bottom surfaces of the recesses 15A and 15B. An opening on the side away from the base end body 20 in the shaft hole 16 is a valve port 39 according to the present invention.

  A branch hole 17 is formed in the intermediate portion of the tip body 13 in the axial direction so as to be orthogonal to the intermediate portion of the shaft hole 16. Further, a fluid introduction hole 18 is formed at a position near the proximal end body 20 in the distal end body 13 so as to be orthogonal to the recess 15A. Note that O-ring grooves 13M and 13N are formed on the outer peripheral surface of the tip body 13 between the fluid introduction hole 18 and the branch hole 17 and between the branch hole 17 and the opening of the recess 15B.

  A cap 19 is fitted and attached to the tip of the tip body 13 on the side provided with the valve port 39. The cap 19 has a cylindrical shape with one end. Further, as shown in FIG. 4, a guide hole 19D (corresponding to the “tilt regulating portion” according to the present invention) is formed through the center of the bottom wall 19C of the cap 19, and a plurality of guide holes 19D are formed around the guide hole 19D. A fluid passage hole 19B is formed through.

  As shown in FIG. 1, the proximal end body 20 is formed by assembling a connector 21, a solenoid 22, an end cylinder 25, an assembly sleeve 27 and the like. The connector 21 supplies power to the solenoid 22 and has a structure including a terminal fitting 21B inside the connector housing 21A.

  The solenoid 22 is formed by winding an electric wire around a bobbin 23, and a terminal fitting 21 </ b> B of the connector 21 is connected to the electric wire at one end of the bobbin 23. Further, an outer cylindrical portion 21G formed integrally with the connector 21 is mounted so as to cover the outer surface of the bobbin 23, and the connector 21 and the solenoid 22 are fixed integrally.

  Of the hollow hole formed inside the solenoid 22, the connector 21 side is closed by the end wall 24 according to the present invention. The end wall 24 is made of a magnetic material. An end tube 25 is provided at the end of the solenoid 22 opposite to the connector 21. The end cylinder 25 has a bottomed cylindrical shape, and the bottom wall 25 </ b> T is directed to the end face of the solenoid 22. A guide cylinder 26 is fitted inside the solenoid 22.

  The end portion of the end tube 25 opposite to the bottom wall 25T is a fitting portion 25K as “adjusting means” according to the present invention. A fitting portion 13K as an “adjusting means” according to the present invention provided at one end of the tip body 13 is press-fitted inside the fitting portion 25K. An O-ring groove 25 </ b> M is formed on the outer peripheral surface of the open end of the end tube 25.

  An assembly sleeve 27 is fitted to the outside of the outer cylinder portion 21G. The assembly sleeve 27 has a structure in which a locking wall 27K extends from one end of the cylindrical body to the inside, and the connector 21, solenoid 22, and end cylinder 25 are inserted in this order from the opening at the other end. The distal end portion of the connector 21 protrudes outward from one end of the assembly sleeve 27, and the proximal end portion of the connector 21 is engaged with the engagement wall 27 </ b> K of the assembly sleeve 27. Further, the other end of the assembly sleeve 27 is bent and deformed toward a locking groove 25N formed on the outer peripheral surface of the end tube 25, whereby the connector 21, the solenoid 22, the end tube 25, the assembly sleeve 27 described above. These parts are integrated to form a proximal end body 20.

  In the present embodiment, for example, after the movable shaft portion 30 is assembled to the distal end body 13, the distal end body 13 and the proximal end body 20 are fitted and fixed to each other. And the internal space of the base end body 20 and the internal space of the recessed part 15A of the front end body 13 are united, and the pressure detection room 28 which concerns on this invention is comprised.

  A connecting shaft 32 is inserted into the shaft hole 16 of the tip body 13. The tip of the connecting shaft 32 protrudes from the valve port 39 into the recess 15B, and the valve body 33 is assembled to the protruding portion. Specifically, the connecting shaft 32 includes a large diameter portion 32A on the pressure detection chamber 28 side and a small diameter portion 32B on the side away from the pressure detection chamber 28. The branch hole 17 communicates with the valve port 39 through a gap between the small diameter portion 32 </ b> B and the inner surface of the shaft hole 16. Further, as shown in FIG. 2, a male screw portion 32N as an “adjusting means” according to the present invention is formed in a portion of the small diameter portion 32B protruding from the valve port 39 into the recess 15B. Further, a tool groove 32M that can engage a tool (for example, a driver) is formed at the tip of the small diameter portion 32B.

  As shown in FIG. 2, the space between the outer peripheral surface of the large-diameter portion 32A of the connecting shaft 32 and the inner surface of the shaft hole 16 is sealed with a seal member 80 (specifically, for example, a disk-shaped packing). Yes. Specifically, as shown in FIG. 5, the distal end body 13 has a shaft hole large diameter portion 16D formed by expanding the opening edge of the shaft hole 16 on the pressure detection chamber 28 side (see FIG. 2). Yes. The shaft hole large-diameter portion 16D is provided with a back surface 16M orthogonal to the axial direction of the shaft hole 16, and the back surface 16M has a hollow disk shape as the “shaft hole seal member” according to the present invention. A seal member 80 is laid. Further, the inner diameter of the seal member 80 is smaller than the inner diameter of the main body portion 16H of the shaft hole 16 opened at the center of the back surface 16M. Further, a tapered surface 16T is formed at the opening edge of the back surface 16M of the main body portion 16H.

  As shown in FIG. 6, a cylindrical bush 81 is press-fitted into the shaft hole large diameter portion 16 </ b> D, and a seal member 80 is sandwiched between the inner surface 16 </ b> M and the cylindrical bush 81. Further, a pressing projection 82 protrudes from the inner edge portion of the cylindrical bush 81 toward the seal member 80. As shown in FIG. 5, the pressing protrusion 82 has an annular shape surrounding the entire inner edge of the cylindrical bush 81, and the outer diameter decreases toward the tip. With this configuration, as shown in FIG. 6, the inner edge portion of the seal member 80 is pushed by the pressing protrusion 82 and deformed into a funnel shape, and is in a state of facing with a slight gap between the tapered surface 16T. Yes. Then, the funnel-shaped portion of the seal member 80 is pushed and spread by the connecting shaft 32 and is in close contact with the outer peripheral surface of the connecting shaft 32 (specifically, the large diameter portion 32A), and the branch hole 17 and the pressure detection chamber 28 (see FIG. 2). ) Is airtight. Even if the fluid pressure in the branch hole 17 is applied to the seal member 80, the funnel-shaped portion of the seal member 80 is reduced in diameter and pressed against the connecting shaft 32 to increase the airtightness. 28 (see FIG. 2) can be reliably prevented from flowing.

  As shown in FIG. 2, the valve body 33 is screwed onto the male screw portion 32 </ b> N of the connecting shaft 32. The valve body 33 has a tubular shape as a whole, and an inner surface of the valve body 33 is formed with a loose fitting portion 33Y in a half portion in the axial direction, and the other half is a female as an “adjusting means” according to the present invention. A screw portion 33N is formed. The loose fitting portion 33Y is loosely fitted to the male screw portion 32N of the connecting shaft 32, and then the valve body 33 is connected to the connecting shaft 32 when the tip of the connecting shaft 32 and the female screw portion 33N of the valve body 33 come into contact with each other. The male and female screw portions 32N and 33N are screwed together. Moreover, the clearance gap between the inner surface of the valve body 33 and the outer surface of the connecting shaft 32 is obstruct | occluded with the adhesive agent for sealing, for example.

  On the outer surface of the valve body 33, an E-ring 35 is attached to an intermediate portion in the axial direction. A first auxiliary spring 36 is assembled between the inner surface of the recess 15B of the tip body 13 and the E ring 35, and a second auxiliary spring is interposed between the E ring 35 and the bottom wall 19C of the cap 19. 37 is assembled.

  A pressure-sensitive cylinder member 42 according to the present invention is fixed to the end of the connecting shaft 32 opposite to the valve body 33. The pressure-sensitive cylinder member 42 has a cylindrical shape with one end, and the end of the connecting shaft 32 is fixed to the center of the outer surface of the bottom wall 42T. A large-diameter portion 42 </ b> D is formed at the end of the pressure-sensitive cylinder member 42 away from the connecting shaft 32.

  A flange 42F protrudes laterally from the opening edge of the pressure-sensitive cylinder member 42, a diaphragm 44 is overlaid on the flange 42F, and a fixed disk 45 is overlaid on the diaphragm 44. The fixed disk 45 and the flange 42F are welded together, and the diaphragm 44 is stretched in a state where the open end 42K of the pressure-sensitive cylinder member 42 is sealed. The welding is performed in a vacuum work space. Thereby, the inside of the pressure-sensitive cylinder member 42 closed by the diaphragm 44 is evacuated.

  By the way, as exaggeratedly shown in FIG. 7, the diaphragm 44 has a plurality of circular rods 44A formed concentrically. And the center part of the diaphragm 44 is displaced to the up-down direction of the figure with the shape change of these circular collars 44A. A hemispherical bulging portion 44 </ b> C that bulges hemispherically toward the inside of the pressure-sensitive cylinder member 42 is formed at the center of the circular flange 44 </ b> A in the diaphragm 44.

  As shown in FIG. 2, an inner contact board 63 and a bottom contact board 64 are accommodated inside the pressure-sensitive cylinder member 42. The inner contact plate 63 has a structure with embosses on the upper and lower surfaces of the disk, while the bottom contact plate 64 has a structure with embosses only on the upper surface of the disk. The inner contact board 63 is assigned to the diaphragm 44, while the bottom contact board 64 is assigned to the bottom surface of the pressure-sensitive cylinder member 42, and the built-in spring 43C is compressed between the inner contact board 63 and the bottom contact board 64. It is sandwiched between Thereby, the upper surface of the inner contact board 63 is in close contact with the inner side of the diaphragm 44, and the center contact part 44 </ b> D according to the present invention is formed at the center part of the diaphragm 44.

  As shown in FIG. 7, a hemispherical recess 63 </ b> A is formed in a recessed manner on the contact surface of the inner contact plate 63 with the diaphragm 44. And the hemispherical bulging part 44C is piled up on the inner surface of this hemispherical recessed part 63A, and the centering recessed part 44B which concerns on this invention is comprised.

  As shown in FIG. 2, the disk portion of the inner contact plate 63 is opposed to the inner surface 42P of the large-diameter portion 42D of the pressure-sensitive cylinder member 42 with a gap therebetween. The amount of movement of the panel 63 to the inner part of the pressure-sensitive cylinder member 42 is regulated to prevent excessive deflection of the diaphragm 44.

  The fixed disk 45 has a structure in which a cylindrical support wall 45 </ b> A is raised from the inner edge of an annular plate material to the side away from the pressure-sensitive cylinder member 42. A plunger 46 is fixed to the support wall 45A. The plunger 46 has a cylindrical shape that is accommodated inside the solenoid 22 so as to be directly movable, and one end thereof is fitted and fixed in the support wall 45A.

  The plunger 46 is provided with a large-diameter portion 46T (corresponding to the “tilt forming portion” according to the present invention) whose outer diameter is slightly larger than the whole plunger 46 at the end portion on the side away from the pressure-sensitive cylinder member 42. It has been. The large diameter portion 46T can be slidably contacted with the inner surface of the guide tube 26. That is, the movable shaft portion 30 including the pressure-sensitive cylinder member 42, the plunger 46, and the connecting shaft 32 is guided in its both ends by the guide hole 19D of the cap 19 and the guide tube 26, and the tilt is regulated. Move straight on.

  As shown in FIGS. 1 and 2, a groove 46M extending in the radial direction is formed on the end face of the plunger 46 on the fixed disk 45 side. Both ends of the groove 46M are open to the outer surface of the plunger 46, so that the fluid pressure in the pressure detection chamber 28 is also applied to the outer surface of the diaphragm 44.

  An abutting member 50 according to the present invention is inserted inside the plunger 46. The abutting member 50 has, for example, a bar shape with a circular cross section, and a base end portion of which is provided with a fitting and fixing shaft 50B that is thin in a stepped shape. The fitting fixing shaft 50B is fitted and fixed in a fixing hole 24A formed in the terminal wall 24. Further, a centering protrusion 50A according to the present invention protrudes from the front end surface of the abutting member 50. The centering protrusion 50A has a hemispherical shape corresponding to the above-described centering recess 44B.

  By the way, in the process of assembling the pressure control valve 10, the abutting member 50 is abutted against the center contact portion 44 </ b> D of the diaphragm 44. At this time, as shown in FIG. 8, the cores of the abutting member 50 and the diaphragm 44 may be misaligned due to the dimensional error of each part. However, according to the configuration of the present embodiment, when the abutting member 50 is pressed against the diaphragm 44, the diaphragm 44 is guided by the outer surface of the centering protrusion 50A and the inner surface of the centering recess 44B as shown in FIG. The abutting member 50 is positioned at the center of the circular rod 44A.

  The configuration of the pressure control valve 10 of the present embodiment is as described above. Next, adjustment work of the pressure control valve 10 will be described. In order to perform the adjustment work, the pressure control valve 10 is set in an adjustment device (not shown), the pressure detection chamber 28 is filled with fluid through the fluid introduction hole 18, and the fluid is filled from the branch hole 17 into the shaft hole 16. Further, the valve element 33 closes the valve port 39. Then, the exciting current i to the solenoid 22 is changed, and the fluid pressure Ps in the pressure detection chamber 28 when the valve element 33 of the pressure control valve 10 opens at each exciting current i is measured. Specifically, when the area of the required portion of the pressure control valve 10, the pressure, and the like are represented by the algebra in Table 1, Equation (1) is established from the balance of forces applied to the movable shaft portion 30.

S2, Ps + Fi + S1, Ps + (S3-S2 '), Pd + f3
= F1 + f2 + S2 '· Pc (1)

  When this equation (1) is arranged, the fluid pressure Ps in the pressure detection chamber 28 is expressed by a linear equation of the excitation current i to the solenoid 22 as shown in the equation (2).

    Ps = Ai + B (2)

  This linear equation is represented as a graph G in FIG. Here, the inclination of the graph G changes according to the screwing position of the valve element 33 with respect to the connecting shaft 32. Therefore, the fluid pressure Pd of the branch hole 17 is made constant and the excitation current i to the solenoid 22 is set to i = 0.25 [A] and i = 0.75 [A], for example, and each excitation current i is set. The fluid pressure Ps in the pressure detection chamber 28 when the valve element 33 of the pressure control valve 10 is opened is measured. From these results, the slope A of the graph G shown in FIG. 10 (that is, A in the above formula (2)) is obtained, and the value of the slope is set to a predetermined set value (required value). The screwing position of the body 33 with respect to the connecting shaft 32 is adjusted.

  Next, when the exciting current i is set to, for example, i = 0.25 [A], the fluid pressure Ps in the pressure detection chamber 28 where the valve body 33 opens is a predetermined set value (required value; Ps1 in FIG. 10). The fitting position of the cap 19 with respect to the tip body 13 is changed so that the resilience of the second auxiliary spring 37 is adjusted. Thus, the adjustment work of the pressure control valve 10 is completed.

Next, the operation of the pressure control valve 10 of this embodiment will be described.
The pressure control valve 10 of this embodiment is attached to the flow path 70 of an air conditioner, for example, as shown in FIG. Specifically, the pressure control valve 10 is inserted and assembled in a valve insertion hole (not shown) provided in the air conditioner. On the inner surface of the valve insertion hole, a fluid supply path 92 provided in the flow path 70, a fluid discharge path 93, and each end of the control flow path 94 are opened, and the fluid discharge path 93 is a pressure control valve. 10, the fluid supply path 92 is communicated with the branch hole 17, and the control flow path 94 is communicated with the pressure detection chamber 28.

  The flow path 70 is provided with an evaporator 97, a condenser 95, and a compressor 96 in the middle of a circulation flow path 99 through which the refrigerant can be circulated. It is incorporated in the compressor 96. The control flow path 94 branches from a circulation flow path 99 between the compressor 96 and the evaporator 97, and the fluid supply path 92 branches from a circulation flow path 99 between the condenser 95 and the compressor 96. . Furthermore, the fluid discharge path 93 is connected to the flow path 70 via an orifice.

  Now, when the fluid pressure Ps in the pressure detection chamber 28 is higher than a predetermined reference pressure, the pressure control valve 10 assembled in the air conditioner as described above has the suction force between the end wall 24 and the plunger 46 and the second auxiliary valve. The valve element 33 is pressed against the edge of the valve port 39 by the elastic force with the spring 37, and the valve port 39 is closed as shown in FIG.

  When the fluid pressure Ps in the pressure detection chamber 28 becomes lower than a predetermined reference pressure, the diaphragm 44 rises from the open end of the pressure-sensitive cylinder member 42 as shown in FIG. 3, and the axial force of the abutting member 50 increases. Thus, the movable shaft 30 side having the diaphragm 44 moves relative to the body 11 downward. As a result, the valve body 33 is separated from the edge of the valve port 39, the valve port 39 is opened, and the fluid flows from the fluid supply path 92 through the branch hole 17 and the valve port 39 to the fluid discharge path 93. Here, since the diaphragm 44 and the abutting member 50 are centered by the centering recess 44B and the centering protrusion 50A, an axial force is applied to the center of the circular flange 44A, and the circular flange 44A is placed around the entire circumference. It deforms uniformly over the entire area, and the elastic force of the diaphragm 44 is stabilized. Thereby, the opening / closing operation | movement of the valve opening 39 by the valve body 33 is also stabilized.

  If the diaphragm 44 and the abutting member 50 are in contact with each other in a misaligned state without provision of the centering recess 44B on the diaphragm 44 side, the circular flange 44A of the diaphragm 44 has an entire circumference as shown in FIG. The elastic force of the diaphragm 44 varies without being uniformly deformed. For this reason, the opening / closing operation of the valve port 39 by the valve body 33 also becomes unstable. However, according to the configuration of the present embodiment, the above-described misalignment can be prevented by the centering recess 44B and the centering protrusion 50A.

  As shown in FIG. 10, if the exciting current i to the solenoid 22 is increased, the fluid pressure Ps in the pressure detection chamber 28 when the valve element 33 is opened decreases.

  As described above, according to the pressure control valve 10 of the present embodiment, the abutting member 50 is positioned at the center of the circular flange 44A of the diaphragm 44 by the centering protrusion 50A and the centering recess 44B. An axial force is applied to the center of the ring 44, and the circular rod 44A is uniformly deformed over the entire circumference, so that the elastic force of the diaphragm 44 is stabilized. Thereby, the opening / closing operation | movement of the valve opening 39 by the valve body 33 is stabilized. In addition, both end portions of the shaft-shaped movable shaft portion 30 including the pressure-sensitive tube member 42, the connecting shaft 32, and the plunger 46 are guided by the guide tube 26 and the guide hole 19D of the cap 19 so as to be linearly movable. The inclination of the movable shaft portion 30 is restricted, and the sliding resistance during linear movement is suppressed and stabilized. Thereby, the opening and closing operation of the valve port 39 by the valve body 33 is further stabilized.

  Further, since both the outer surface of the centering protrusion 50A and the inner surface of the centering recess 44B are substantially hemispherical surfaces, stress concentration can be prevented. Furthermore, the strength of the diaphragm 44 can be increased by bringing the inner contact board 63 into close contact with the inner surface of the diaphragm 44. In addition, even if the distance between the end wall 24 and the diaphragm 44 varies in assembling, the connecting shaft 32 and the male and female screw portions 32N and 33N of the valve body 33 cause the end wall 24 and the diaphragm 44 to be separated from each other. The elastic force of the diaphragm 44 against the abutting member 50 can be adjusted by changing the distance between them. As a result, variation in the correspondence between the fluid pressure Ps in the pressure detection chamber 28 and the opening / closing of the valve element 33 can be suppressed, and the opening / closing control of the valve element 33 is performed with the same accuracy as the bellows even when the diaphragm 44 is used. It becomes possible.

[Second Embodiment]
This embodiment is different from the first embodiment in that an outer contact board 65 is fixed at the center of the outer surface of the diaphragm 44 as shown in FIG. Hereinafter, only the configuration different from that of the first embodiment will be described, and the same configuration as that of the first embodiment will be denoted by the same reference numerals and redundant description will be omitted.

  In the pressure control valve 89 of the present embodiment, the center contact portion 44D according to the present invention is configured by adhering the outer contact board 65 to the center of the outer surface of the diaphragm 44 with an adhesive, for example. A hemispherical centering recess 65A is formed in the upper surface of the outer contact board 65, and the centering protrusion 50A of the abutting member 50 is abutted against the centering recess 65A. Further, the diaphragm 44 is sandwiched between the outer contact board 65 and the inner contact board 63. Furthermore, a convex engagement portion 65B is provided on the lower surface of the outer contact board 65, and this convex engagement section 65B engages with the hemispherical recess 63A of the inner contact board 63 and engages with the hemispherical recess 63A. A hemispherical bulging portion 44C of the diaphragm 44 is sandwiched between the portion 65B.

  According to the configuration of the present embodiment, the outer abutment board 65 is brought into close contact with the outer surface of the diaphragm 44 to form the center abutting portion 44D, so that the diaphragm 44 is reinforced. In addition, since the hemispherical concave portion 63A and the convex engagement portion 65B provided on the inner contact board 63 and the outer contact board 65 are engaged with each other with the diaphragm 44 interposed therebetween, the outer contact board 65 and the diaphragm 44 Assembly accuracy can be improved.

[Third Embodiment]
In this embodiment, as shown in FIG. 12, the valve body 53 and the connecting shaft 51 are integrally formed, and the pressure-sensitive cylinder member 42 and the connecting shaft 51 are separate parts. Then, the female screw portion 52N as the “adjustment means” according to the present invention formed on the bottom wall 42T of the pressure-sensitive cylinder member 42 is used as the “adjustment means” according to the present invention formed at one end of the connecting shaft 51. The point that the male screw part 51N is screwed is different from the first embodiment. Hereinafter, only the configuration different from that of the first embodiment will be described, and the same configuration as that of the first embodiment will be denoted by the same reference numerals and redundant description will be omitted.

  The pressure-sensitive cylinder member 42 is formed with a bottom projection 52 projecting from the center of the inner surface of the bottom wall 42T toward the diaphragm 44 side. A built-in spring 43 </ b> C is fitted to the bottom protrusion 52. A female screw 52N is formed at the center of the outer surface (the lower surface in FIG. 12) of the bottom wall 42T. The female screw portion 52N extends along the core portion of the bottom surface protrusion 52, opens only to the outer surface of the bottom wall 42T, and the front end side of the bottom surface protrusion 52 is closed. In addition, a circular concave portion 52M centered on the female screw portion 52N is recessed in the bottom wall 42T.

  The connecting shaft 51 has a structure including a small diameter portion 32B, a large diameter portion 32A, and a male screw portion 51N in order from the valve body 53 side. The male screw portion 51N has substantially the same diameter as the small-diameter portion 32B, and both end portions of the large-diameter portion 32A are tapered and continue to the small-diameter portion 32B and the male screw portion 51N. The male screw portion 51N is screwed into the female screw portion 52N of the pressure-sensitive cylinder member 42. A tool groove 53M that can engage a tool (for example, a driver) is formed at the tip of the valve body 53 on the side away from the connecting shaft 51.

  In order to assemble the pressure control valve 90 of the present embodiment configured as described above, for example, the connecting shaft 51 is inserted into the shaft hole 16 of the distal end body 13 before the distal end body 13 and the proximal end body 20 are fitted. Keep it. In this state, for example, an adhesive is applied to the male screw portion 51N of the connecting shaft 51, and is screwed into the female screw portion 52N of the pressure-sensitive cylinder member 42. At this time, the adhesive overflowing from the female screw portion 52N is accumulated in the recess 52M.

  Next, the distal end body 13 and the proximal end body 20 are fitted. Then, a tool (not shown) is inserted through the fluid introduction hole 18 to prevent the pressure-sensitive cylinder member 42 from rotating, and the end wall 24 is changed by changing the screwing depth of the male and female screw portions 51N and 52N before the adhesive is solidified. By changing the distance between the diaphragm 44 (see FIG. 1) and the diaphragm 44, the resilience of the diaphragm 44 against the abutting member 50 is adjusted. As a result, variation in the correspondence between the fluid pressure Ps in the pressure detection chamber 28 and the opening / closing of the valve element 33 can be suppressed, and the opening / closing control of the valve element 33 is performed with the same accuracy as the bellows even when the diaphragm 44 is used. It becomes possible.

[Fourth Embodiment]
In the present embodiment, as shown in FIG. 13, the structure of the connecting shaft 62 is different from those in the first and second embodiments. Hereinafter, only configurations different from those of the first and second embodiments will be described, and the same configurations as those of the first and second embodiments will be denoted by the same reference numerals, and redundant description will be omitted.

  From the pressure-sensitive cylinder member 42 provided in the pressure control valve 91 of the present embodiment, the first connecting shaft constituting portion 60 extends to a middle portion in the shaft hole 16. A female screw portion 60N as an “adjusting means” according to the present invention is formed at the tip of the first connecting shaft constituting portion 60. Further, the second connecting shaft constituting portion 61 extends from one end of the valve body 53 to a middle portion in the shaft hole 16. A male screw part 61N as an “adjusting means” according to the present invention is also formed at the tip of the second connecting shaft constituting part 61.

  In order to assemble the pressure control valve 91 of the present embodiment configured as described above, for example, before the distal end body 13 and the proximal end body 20 are fitted, the male screw portion 61N of the second connecting shaft constituting portion 61 is fitted. Adhesive is applied, and the first and second connecting shaft constituting portions 60 and 61 are inserted from both ends of the shaft hole 16, respectively. Then, the male and female screw portions 60N and 61N are screwed together in the shaft hole 16. Thereby, the 1st and 2nd connection shaft structure parts 60 and 61 are connected, and it becomes the connection shaft 62 which concerns on this invention. At this time, the adhesive overflowing from the female screw portion 60N accumulates in a step portion between the first connecting shaft constituting portion 60 and the second connecting shaft constituting portion 61.

  Next, the distal end body 13 and the proximal end body 20 are fitted. Then, by inserting a tool (not shown) from the fluid introduction hole 18 to prevent the pressure-sensitive cylinder member 42 from rotating, and changing the screwing depth between the male and female screw parts 60N and 61N before the adhesive is solidified, The elastic force of the diaphragm 44 against the abutting member 50 is adjusted by changing the distance between the end wall 24 (see FIG. 1) and the diaphragm 44. As a result, variation in the correspondence between the fluid pressure Ps in the pressure detection chamber 28 and the opening / closing of the valve element 33 can be suppressed, and the opening / closing control of the valve element 33 is performed with the same accuracy as the bellows even when the diaphragm 44 is used. It becomes possible.

[Fifth Embodiment]
The pressure control valve 100 of this embodiment is shown in FIGS. 14 to 16, and the structure of the movable shaft part 30 is mainly different from that of the first embodiment. Hereinafter, only the configuration different from that of the first embodiment will be described, and the same configuration as that of the first embodiment will be denoted by the same reference numerals and redundant description will be omitted.

  The plunger 46V provided in the movable shaft portion 30 of the present embodiment is shorter than the plunger 46 provided in the movable shaft portion 30 of the first embodiment, as shown in comparison with FIG. 14 and FIG. Specifically, the plunger 46V has a length that is, for example, less than half that of the solenoid 22. Further, as the plunger 46V is shortened, the end wall 24V is extended downward as compared to the end wall 24 of the first embodiment.

  The bottom wall 19 </ b> C of the cap 19 </ b> V of the present embodiment is disposed below the lower end portion of the connecting shaft 32. A through hole 19Y for allowing fluid to pass through is formed in the center of the bottom wall 19C. The plunger 46V of the present embodiment is not provided with the large diameter portion 46T of the first embodiment. Thus, unlike the first embodiment, the pressure control valve 100 of the present embodiment tilts the movable shaft portion 30 between the cap 19V and the connecting shaft 32 and between the guide tube 26 and the plunger 46V. In this embodiment, the movable shaft portion 30 is tilted by centering by the center contact portion 44D and sliding contact between the connecting shaft 32 and the seal member 80. It is regulated.

  The pressure control valve 100 of the present embodiment has the following configuration and effects as follows. In FIG. 15, for example, a state in which the axis center of the movable shaft portion 30 is assembled with the axis center of the body 11 including the abutting member 50 tilted due to a dimensional error of each component of the pressure control valve 100 or the like. It is highlighted. In such a case, the movable shaft portion 30 is inclined with respect to the normal assembled state (FIG. 14) with the center contact portion 44D as a fulcrum, and the inclination is regulated by the contact between the movable shaft portion 30 and the seal member 80. Is done. Thereby, for example, the plunger 46 can be prevented from coming into contact with the inner surface of the body 11 (specifically, the inner surface of the guide tube 26), and the connecting shaft 32 can be prevented from coming into contact with the inner surface of the shaft hole 16. Then, the sliding contact resistance when the movable shaft portion 30 moves linearly can be limited only to the sliding contact resistance between the connecting shaft 32 and the seal member 80. Here, since the connecting shaft 32 and the seal member 80 are slidably contacted even in the regular assembled state, an increase in sliding contact resistance is suppressed between the regular assembled state and the state where the movable shaft portion 30 is tilted. be able to.

  Moreover, in this embodiment, since the plunger 46V was shortened compared with 1st Embodiment, between the regular assembly | attachment state and the state in which the movable shaft part 30 was inclined and assembled, the terminal wall 24V and the plunger 46V The change in magnetic attraction force can be suppressed. Here, FIG. 16 shows a state in which the movable shaft 30 is inclined by a predetermined angle in the configuration of the present embodiment, and a state in which the movable shaft 30 is inclined by the same predetermined angle in the configuration of the first embodiment. Overlaid. As indicated by the two-dot chain line in the figure, in the configuration of the first embodiment, when the movable shaft portion 30 is inclined by a predetermined angle, the gap between the upper end surface 46S2 of the plunger 46 and the lower end surface 24S2 of the end wall 24 is shown. Thus, the distance between the closest parts is t11, and the distance between the most distant parts is t12. On the other hand, as shown by the solid line in the figure, in the configuration of the present embodiment, when the movable shaft portion 30 is inclined by the same angle, the upper end surface 46S1 of the plunger 46V and the lower end surface 24S1 of the end wall 24V are The distance between the closest parts is t11, and the distance between the most distant parts is t12. As is apparent from the figure, the difference between the distance between these closest parts and the distance between the most distant parts is that the pressure control valve 100 of this embodiment is the pressure of the first embodiment. Smaller than the control valve 10.

  Therefore, the magnetic attraction force calculated based on these distances also acts on the closest part between the upper end surface 46S1 of the plunger 46V and the lower end surface 24S1 of the end wall 24V according to the configuration of the present embodiment. The difference between the magnetic attractive force f1 that acts and the magnetic attractive force f2 that acts on the farthest part is smaller than the difference between the magnetic attractive forces f11 and f12 according to the configuration of the first embodiment. That is, an unbalance of the magnetic attractive force due to the tilting of the movable shaft portion 30 is prevented, and the magnetism between the terminal wall 24V and the plunger 46 is between the normal assembled state and the state where the movable shaft portion 30 is tilted. A change in suction force can be suppressed.

[Other Embodiments]
The present invention is not limited to the above-described embodiment. For example, the embodiments described below are also included in the technical scope of the present invention, and various other than the following can be made without departing from the scope of the invention. It can be changed and implemented.

1 a pressure control valve of the first to fifth embodiment, provided with stop members 50, 50 V to centering the protrusion 10A, to centering the diaphragm 44 side recesses 44B, 65A was equipped with However, the tip end surface of the abutting member may be recessed into a hemispherical shape to form a centering recess, and the tapered centering projection may be protruded from the center of the diaphragm.

(2) In the first to fifth embodiments, the inner contact plate 63 and / or the outer contact plate 65 of the diaphragm 44 are in close contact with each other, but the diaphragm 44 alone is brought into contact with the abutting member 50. A configuration may be used.

  (3) In the pressure control valves of the first to fifth embodiments, the abutting members 50 and 50V are assembled and fixed to the end walls 24 and 24V. You may form integrally.

  (4) By changing the press-fitting depth of the fitting portions 13K and 25K provided in the divided portion of the body 11 in the pressure control valve of the first to fifth embodiments, the end walls 24 and 24V The distance from the diaphragm 44 may be adjusted.

Side sectional view of the pressure control valve according to the first embodiment of the present invention. Cross-sectional side view with the pressure control valve closed Side cross-sectional view with pressure control valve open Bottom view of cap Disassembled side sectional view of tip body, packing plate and bush Side sectional view of the tip body, packing plate and bush assembled Sectional view showing the state of fitting into the centering protrusion and the centering recess Sectional drawing which showed the state which the core of the abutting member and the diaphragm shifted | deviated Sectional drawing which showed the deformation | transformation state of the diaphragm when not providing the centering recessed part Correspondence graph between fluid pressure in pressure detection chamber of pressure control valve and current of solenoid Side sectional view of the pressure control valve according to the second embodiment Side sectional view of a pressure control valve according to a third embodiment Side sectional view of a pressure control valve according to a fourth embodiment Side sectional view of a pressure control valve according to a fifth embodiment Side sectional view of the pressure control valve with the movable shaft tilted Partial sectional view with the movable shaft of the pressure control valve tilted

Explanation of symbols

10,89,90,91,10 0 pressure control valve 1 1 volume de <br/> 13K, 25K fitting portion (adjusting means)
16 Shaft hole 17 Branch hole 18 Fluid introduction hole 19D Guide hole (tilt regulating part)
22 solenoid 24, 24 V final end wall 24A fixing holes 25T bottom wall 26 guide cylinder (tilt regulating part)
28 Pressure detection room 30 Movable shaft portion 32, 51, 62 Connecting shaft 32N, 33N, 51N, 52N, 60N, 61N Screw portion (adjustment means)
33,5 3 valve body 39 valve ports 4 2 sense pressure cylinder member 42T bottom wall 44 diaphragm 44A circular folds 44B, to I 65A wick recess 44C hemispherical bulging portion 44D central abutment portion 46, 46 V-flop plunger <br/> 46T Large diameter part (Tilt restricting part)
50, 50 V butt those members 50A core but to protrusion 63A hemispherical recess (concavo-convex engaging section)
65B Convex engaging part (concave engaging part)
80 Seal member Ps Fluid pressure

Claims (15)

Valve (33,5 3) is a body which is assembled to be linear (1 1), wherein the body (1 1) which is formed on the pressure detected room (28), a cylindrical pressure sensing at one end a bottom a tubular member (4 2), is stretched to the open end of the sensitive pressure cylinder member (4 2), a diaphragm (44) to elastically deform in response to pressure in the pressure sensing within the room (28), the diaphragm ( 44) and an abutting member (50, 50 V) for directly moving the valve body (33, 53 ) according to elastic deformation of the diaphragm (44), and the body ( 11) in the valve port (39) and a pressure control valve with a (10,89,90,91,10 0) formed is opened and closed by said valve body (33,5 3),
The pressure-sensitive cylinder member (42) is accommodated in the pressure detection chamber (28),
A circular ridge (44A) formed on the diaphragm (44);
A center contact portion (44D) provided at the center of the circular flange (44A) of the diaphragm (44);
A taper-shaped centering protrusion (50A) formed on one of the abutting member (50, 50 V) and the center contact part (44D);
It is formed on the other of the abutting member (50, 50 V) and the center abutting portion (44D) to receive the centering projection (50A), and the abutting member at the center of the diaphragm (44) guide to it centering recess (44B, 65A) so as to match the axis of (50, 50 V) and said body (11) formed through the wall surrounding the pressure sensing chambers (28) of and the A shaft hole (16) provided with the valve port (39) on the side away from the pressure detection chamber (28);
The valve body (33, 53) is provided at one end that is inserted through the shaft hole (16) and protrudes from the valve port (39), and the other end that protrudes into the pressure detection chamber (28) has the sensation. A connecting shaft (32, 51, 62) to which the bottom wall (42T) of the pressure cylinder member (42) is fixed;
Valve body closing biasing means (22, 46, 46V) for biasing the valve body (33, 53) toward the opening edge of the valve port (39);
A branch hole (17) branched from an intermediate portion of the shaft hole (16);
A shaft hole sealing member (80) that seals a gap between the inner surface of the shaft hole (16) closer to the pressure detection chamber (28) than the branch hole (17) and the connecting shaft (32, 51, 62). )When,
A terminal wall (24, 24V) provided at a position facing the diaphragm (44) in the body (11) and holding the base end of the abutting member (50, 50V);
When the fluid pressure (Ps) in the pressure detection chamber (28) becomes lower than a predetermined reference pressure, the valve body (33, 53) opens the valve port (39), and the pressure detection chamber (28). ), The valve body (33, 53) is configured to close the valve port (39) when the fluid pressure (Ps) in the interior becomes higher than a predetermined reference pressure. (10, 89, 90, 91, 100 ) . The pressure control valve (10, 10) according to claim 1, wherein the shape of the outer surface of the centering protrusion (50A) and / or the inner surface of the centering recess (44B, 65A) is substantially hemispherical. 89, 90, 91, 100 ) . Accommodates the inner contact plate (63) in the sense of pressure cylinder member (4 2) in its inner contact plate (63) is adhered to the inner surface of the diaphragm (44), the diaphragm (44) and said inner contact 3. The pressure control valve (10, 90, 91, 100 ) according to claim 1 or 2, wherein a portion of the panel (63) that is in close contact with each other is depressed to form the centering recess (44 </ b> B ) . An outer contact plate (65) is brought into close contact with a portion of the outer surface of the diaphragm (44) against which the abutting member (50, 50 V) is abutted, and the centering recess (65A) is placed on the outer contact plate (65). the pressure control valve according to claim 1 or 2, characterized in that the formation of the (8 9). Wherein accommodates the inner contact plate (63) in the sense of pressure cylinder member (4 2), the inner contact plate (63) is brought into close contact with the inner surface of the diaphragm (44), the inner contact plate (63) The diaphragm (44) is sandwiched between the outer contact board (65),
The inner contact board (63) and the outer contact board (65) are provided with concave and convex engaging portions (63A, 65B) that are engaged with the diaphragm (44) with the diaphragm (44) interposed therebetween. the pressure control valve according to claim 4, wherein (8 9). The fixing hole (24A) in which the base end portion (50B) of the abutting member (50, 50V) is fitted and fixed is formed in the end wall (24, 24V). The pressure control valve according to any one of 5 (10, 89, 90, 91, 100). A cylindrical plunger (46, 46V) extending from the pressure-sensitive cylinder member (42) to the opposite side of the connecting shaft (32, 51, 62) and having the abutting member (50, 50V) inserted in the center thereof. When,
  The plunger (46, 46V) is provided with a solenoid (22) capable of applying an axial force by a magnetic force,
  The pressure control valve (10) according to any one of claims 1 to 6, wherein the valve body closing biasing means (22, 46, 46V) comprises the plunger (46, 46V) and the solenoid (22). 89, 90, 91, 100). Between the side surface of the movable shaft portion (30) including the connecting shaft (32, 51, 62) and the plunger (46) and moving linearly with respect to the body (11), and the inner surface of the body (11) The tilting restricting portions (19D, 46T) for restricting the tilting of the movable shaft portion (30) by partially narrowing the gap are provided at two positions on both ends of the movable shaft portion (30). The pressure control valve (10, 89, 90, 91) according to claim 7. The movable shaft portion (30) including the communication shaft (32, 51, 62) and the plunger (46V) and moving linearly with respect to the body (11) tilts with the center contact portion (44D) as a fulcrum. 8. The pressure control valve (100) according to claim 7, wherein the operation is restricted by the shaft hole sealing member (80). The pressure control valve (100) according to claim 9, wherein the length of the plunger (46V) is less than half of the solenoid (22). Adjustment means (32N, 33N, 51N) for adjusting the distance between the end wall (24, 24V) and the diaphragm (44) when the valve body (33, 53) closes the valve port (39) , 52N, 60N, 61N), the pressure control valve (10, 89, 90, 91, 100) according to any one of claims 1 to 10. The valve body (33, 53) has a cylindrical shape through which the connecting shaft (32) passes, and a male and female screw portion (32N) is provided between the valve body (33, 53) and the connecting shaft (32). 33N),
  The pressure control valve (10, 89, 100) according to claim 11, wherein the adjusting means (32N, 33N) is constituted by the male and female screw portions (32N, 33N). The pressure-sensitive cylinder member (42) and the connecting shaft (51) are separated from each other, and male and female screw portions (51N, 52N) screwed into the pressure-sensitive cylinder member (42) and the connecting shaft (51). The pressure control valve (90) according to claim 11, wherein the adjusting means (51N, 52N) is configured by the male and female screw portions (51N, 52N). The connecting shaft (62) is connected to the first connecting shaft constituting portion (60) extending from the pressure-sensitive cylinder member (42) to a middle portion in the shaft hole (16) and the valve body (33, 53). A second connecting shaft constituent part (61) formed integrally and extending to a middle part in the shaft hole (16),
  The first and second connecting shaft constituent parts (60, 61) are provided with male and female screw parts (60N, 61N) that are screwed together,
  The pressure control valve (91) according to claim 11, wherein the adjusting means (60N, 61N) is constituted by the male and female screw portions (60N, 61N). The body (11) is divided, and fitting portions (13K, 25K) that are press-fitted to each other are provided in the divided portions, and the adjusting means (13K, 25K) is provided by these fitting portions (13K, 25K). The pressure control valve (10, 89, 90, 91, 100) according to any one of claims 11 to 14, characterized in that it is configured.

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