CN102985737A

CN102985737A - Solenoid valve

Info

Publication number: CN102985737A
Application number: CN2011800343735A
Authority: CN
Inventors: 三浦龙也; 藤野有辉; 中平亮
Original assignee: Keihin Dock Co Ltd
Current assignee: Hitachi Astemo Ltd
Priority date: 2010-07-13
Filing date: 2011-04-27
Publication date: 2013-03-20
Anticipated expiration: 2031-04-27
Also published as: WO2012008202A1; JP2012021562A; CN102985737B; JP5437187B2

Abstract

A first small-diameter shaft section (21a) is interconnected with the end of a plunger (21), which is located on the valve seat (10) side, with a first annular stepped section (21a') therebetween, and a second small-diameter shaft section (21b) is interconnected with an end of the first small-diameter shaft section (21a) with a second annular stepped section (21b') therebetween. A valve element (24) is configured from: a boss section (24a) fitted over and secured in an airtight manner to the second small-diameter shaft section (21b); a seating section (24c) surrounding the boss section (24a) and seated on the valve seat (10); and a flexible section (24b) for connecting the boss section (24a) and the seating section (24c) in such a manner that the boss section (24a) and the seating section (24c) can tilt relative to each other. A spring seat plate (23) is loosely fitted in a tiltable manner on the first small-diameter shaft section (21a), and the spring seat plate (23) is in contact with the boss section (24a) and the seating section (24c) to support the movable end of a coiled spring (28). The solenoid valve has the simple configuration and can achieve a satisfactory fully closed state without being affected by relative tilt between the valve seat and the valve element caused by manufacturing errors.

Description

Solenoid valve

Technical field

The present invention relates to the improvement of solenoid valve, described solenoid valve comprises: valve body, and it has valve seat; The solenoid supporting mass, it engages with this valve body; The spool that elastic material is made, it is seated at described valve seat; Plunger, it supports this spool, and this plunger can be supported on described solenoid supporting mass freely slidably; Helical spring, its around this plunger and to described spool to the direction application of force that is seated at described valve seat; And solenoid, it is installed on described solenoid supporting mass, and overcomes described helical spring active force and make described plunger to the standard-sized sheet side action of described spool in when energising.

Background technique

As patent documentation 1 was disclosed, known had an above-mentioned solenoid valve.

The prior art document

Patent documentation

Patent documentation 1: Japanese kokai publication hei 08-326946 communique

Summary of the invention

The problem that invention will solve

In above-mentioned solenoid valve in the past, in order not to be subjected to guarantee good full-shut position owing to making valve seat that error causes and the impact of spool inclination each other, with spool freely deflection be installed on plunger (inclination activity), and between spool and plunger, be provided for the sealing unit that keeps airtight.

But, in such solenoid valve, owing to sealing unit makes the structure complicated, not only be difficult to reduce cost, and might damage good full-shut position owing to the unfavorable condition of sealing unit.

The present invention In view of the foregoing finishes just, and its purpose is to provide a kind of solenoid valve simple in structure, and it is not subjected to owing to making valve seat that error causes and the impact of spool inclination each other, and can guarantee good full-shut position.

Be used for solving the means of problem

In order to reach above-mentioned purpose, the present invention is a kind of solenoid valve, and it comprises: valve body, and it has valve seat; The solenoid supporting mass, it engages with this valve body; The spool that elastic material is made, it is seated at described valve seat; Plunger, it supports this spool, and this plunger can be supported on described solenoid supporting mass freely slidably; Helical spring, its around this plunger and to described spool to the direction application of force that is seated at described valve seat; And solenoid, it is installed on described solenoid supporting mass, and overcome described helical spring active force and make described plunger to the standard-sized sheet side action of described spool in when energising, the First Characteristic of described solenoid valve is, the the first path axial region that links to each other through the first ring-type end difference is set continuously in the end of the described valve seat side of described plunger, and the second path axial region that links to each other through the second annular stepped section is set continuously in the end of this first path axial region, described spool is by hub section, section and the flexible portion of taking a seat consists of, described hub section cooperates airtightly and is anchored on described the second path axial region, the described section of taking a seat is around above-mentioned hub section and be seated at described valve seat, described flexible portion couples together described hub section and the section of taking a seat in the mutual mode of deflection, spring seat board can have on the bias play ground and cooperate with described the first path axial region, described spring seat board and described hub section and the section's butt and support described helical spring movable end of taking a seat.

In addition, Second Characteristic of the present invention is, on the basis of First Characteristic, forms around the annular slot of described hub section at the end face of described spool, utilizes the thinning part of a side opposite with this annular slot of this spool to consist of the flexible portion of described ring-type.

And, the of the present invention the 3rd is characterised in that, first or the basis of Second Characteristic on, in the end of described the second path axial region the 3rd annular stepped section the 3rd path axial region is set continuously, holding member and the described hub of described airtightly clamping of the second annular stepped section section of the 3rd path axial region is fixed in utilization, and this holding member forms its external diameter greater than the center-diameter of the flexible portion of described ring-type.

And, the of the present invention the 4th is characterised in that, on the basis of First Characteristic, by for several times in intimate contact the wind spring wire rod the movable end of described helical spring and described spring seat board butt is formed thickened end, described thickened end has the axial thickness larger than the gap that produces between described the first ring-type end difference and described spring seat board.

The invention effect

In accordance with a first feature of the invention, even owing to the making error of each parts makes the parallel accuracy of the opposed faces of spool and valve seat have deviation, also can be by means of the hub section of spool and take a seat mutual deflection between the section and the mutual deflection between spring seat board and the first path axial region, and utilize helical spring load to make the section of taking a seat be seated at reliably valve seat, can guarantee the good valve state that closes.

And, because the hub section of spool merely cooperates and be anchored on the second path axial region of plunger airtightly, therefore between spool and plunger, need not special sealed member, can help simplified structure.

According to Second Characteristic of the present invention, can utilize single member to consist of the spool that is consisted of by hub section, flexible portion and the section of taking a seat, can obtain this spool by qurer.

According to the 3rd feature of the present invention, when the spool standard-sized sheet, can utilize holding member to prevent the section of taking a seat owing to the attitude that deadweight, vibration, pressure etc. cause changes, the attitude stabilization in the time of therefore can also making next close valve.

According to the 4th feature of the present invention, under the state of the back side of spring seat board and spool close contact, even between spring seat board and the first ring-type end difference, produce the gap, can prevent that also helical spring movable end from clipping in this gap, can make all the time rightly action of helical spring.And, need not can help simplified structure be used to the special lid that prevents that this helical spring movable end from being pressed from both sides.

Description of drawings

Fig. 1 is the longitudinal section of the solenoid valve of embodiments of the present invention.(the first embodiment)

Fig. 2 is the enlarged view of 2 parts among Fig. 1.(the first embodiment)

Fig. 3 is the Action Specification figure corresponding with Fig. 2.(the first embodiment)

Label declaration

V: solenoid valve;

5: valve body;

6: the solenoid supporting mass;

10: valve seat;

14: solenoid;

21: plunger;

21a～21c: the first～the 3rd path axial region;

21a '～21c ': the first～the 3rd annular stepped section;

23: spring seat board;

24: spool;

24a: hub section;

24b: flexible portion;

24c: the section of taking a seat;

25: holding member;

28: helical spring;

28a: helical spring movable end (thickened end).

Embodiment

Below, with reference to the accompanying drawings embodiments of the present invention are described.

Embodiment 1

At first, in Fig. 1, the throttle body T that is installed on not shown motor has the intake duct 1 that links to each other with the suction port of motor, thereby the throttle valve 2 of butterfly type that opens and closes the intake duct amount of this intake duct 1 control engine is supported on throttle body T by axle.In addition, bypass 3 is connected with throttle body T, and this bypass 3 is walked around throttle body T and is communicated with between the upstream and downstream section with intake duct 1, in the insertion midway of this bypass 3 solenoid valve V of the present invention is installed.This solenoid valve V is normal close type, can make bypass 3 conductings by opening this solenoid valve V.

According to Fig. 1 and Fig. 2 this solenoid valve V is at length described.

Solenoid valve V possesses: the valve body 5 that is supported on throttle body T or motor; With the solenoid supporting mass 6 that utilizes bolt 7 to engage with this valve body 5.In order to stipulate this valve body 5 and solenoid supporting mass 6 engagement positio each other, the location cylinder section 9 of lower surface that is arranged on projectedly solenoid supporting mass 6 is chimeric with the circular depressions 8 of the upper surface that is formed at valve body 5, at this embedding part sealed member 22 is installed.

In addition, be formed with the valve seat 10 of lifting in the form of a ring from the section of bottom center of described circular depressions 8 at valve body 5, the upstream portion 3a of described bypass 3 is connected with the inlet opening 11 of the bottom surface in valve seat 10 outsides that are opened on circular depressions 8, and the valve opening 12 in the downstream portion 3b of described bypass 3 and the valve seat 10 is connected.

Solenoid supporting mass 6 is that synthetic resin is made.Be embedded with at this solenoid supporting mass 6: coil carrier 13; Solenoid (solenoid) 14, it is wound in coil carrier 13; Yoke 15, the up and down both end sides that it surrounds the periphery of this solenoid 14 and bends to coil carrier 13; Columned fixed iron core 16, its upper end from coil carrier 13 is flush-mounted in the hollow portion of coil carrier 13 to the intermediate portion of coil carrier 13, and rivets integratedly the upper head plate 15a that is incorporated into yoke 15; And power supply terminal 17, it links to each other with solenoid 14, in the connector 18 of one side, top that this power supply terminal 17 is configured to that terminal part is in and is arranged at projectedly integratedly solenoid supporting mass 6.

The lower end sheet 15b of yoke 15 be provided with link to each other with the hollow portion of coil carrier 13, with it with footpath or diameter than its slightly large open-work 19, link to each other with this open-work 19 and diameter is arranged on the central part of location cylinder section 9 than these open-work 19 large location hole of the spring 20.Above-mentioned coil carrier 13, open-work 19, location hole of the spring 20 and valve seat 10 are configured on the same axis.

Can freely be inlaid in slidably the bottom of the hollow portion of coil carrier 13 with the plunger 21 of the opposed movable core in lower end surface of fixed iron core 16 as connecting open-work 19.Protrude to the below of location cylinder section 9 underpart of this plunger 21, underpart in this plunger 21, be provided with continuously successively: the first path axial region 21a that links to each other with this underpart through the first ring-type end difference 21a ', the the second path axial region 21b that links to each other with the end of this first path axial region 21a through the second 21b ' of annular stepped section, and, the 3rd path axial region 21c that links to each other with the end of this second path axial region 21b through the 3rd 21c ' of annular stepped section, their axial length is along with increasing towards the 3rd path axial region 21c from the first path axial region 21a.

Diameter can have on the bias play ground than valve seat 10 large discoideus spring seat boards 23 and cooperate with the first path axial region 21a.Center-hole diameter by making spring seat board 23 is larger and make the length of thickness ratio the first path axial region 21a of spring seat board 23 thin than the first path axial region 21a diameter, can make this spring seat board 23 with respect to the first path axial region 21a deflection.The discoideus spool 24 that makes front surface be seated at valve seat 10 cooperates with the second path axial region 21b airtightly in the length range of the second path axial region 21b.Diameter by being pressed into the 3rd path axial region 21c that is anchored on the diameter minimum, utilizes airtightly clamping spool 24 of this holding member 25 and described the second 21b ' of annular stepped section than the enough little holding member 25 of valve opening 12.Described spring seat board 23 overlaps the back side of this spool 24.

Spool 24 is that the rubber elastomeric material is made, and forms annular slot 26 at its back side, thereby forms thin and be the flexible portion 24b of ring-type in the front surface side of spool 24.Like this, spool 24 possesses: the 24a of hub section (boss) that is held parts 25 and the second airtightly clamping of the 21b ' of annular stepped section; Be seated at the 24c of the section of taking a seat of valve seat 10 with centering on the 24a of this hub section; And with the 24a of this hub section with the flexible portion 24b of the ring-type that the 24c of section couples together of taking a seat.And the 24a of hub section and the 24c of section that takes a seat utilize the deflection of flexible portion 24b and mutual deflection.It is larger than the center-diameter D1 of the flexible portion 24b of ring-type that described holding member 25 forms its outer diameter D 2.

Between solenoid supporting mass 6 and spring seat board 23, compress and be provided with the helical spring 28 of spool 24 to the direction application of force that is seated at valve seat 10, when spool 24 is seated at valve seat 10, between fixed iron core 16 and plunger 21, be provided with spool 24 open constant clearance g corresponding to Valve travel.

Above-mentioned helical spring 28 is the single springs with coniform coil portion 29 and cylindric coil portion 30, described cylindric coil portion 30 extends with the diameter identical with this miner diameter end 29b from the miner diameter end 29b of this coniform coil portion 29, this coniform coil portion 29 is configured to make its bigger diameter end 29a and the inner peripheral surface of described location hole of the spring 20 to cooperate and be supported on the lower end sheet 15b of yoke 15, and cylindric coil portion 30 is configured in the periphery of plunger 21 with concentric shape and makes its lower end and spring seat board 23 butts.

As described above, in order to make the spring seat board 23 can be with respect to the first path axial region 21a deflection, make the center-hole diameter of spring seat board 23 larger than the first path axial region 21a diameter, and make the length of thickness ratio the first path axial region 21a of spring seat board 23 thin, therefore, under the state of spring seat board 23 and the back side close contact of spool 24, generation gap s1 between spring seat board 23 and the first ring-type end difference 21a '.For the underpart 28a that makes the helical spring 28 that is supported on spring seat board 23, be that the 28a of movable end section is not sandwiched among the s1 of this gap, by for several times in intimate contact the wind spring wire rod make this movable end 28a form the thickened end 28a with axial thickness s2 larger than above-mentioned gap s1.Thus, can make all the time suitably action of helical spring 28.And, need not the special lid that is pressed from both sides be used to the movable end that prevents this helical spring 28.

Like this, the helical spring 28 that is made of coniform coil portion 29 and cylindric coil portion 30 is made of the single line material of wire diameter homogeneous, and the spring constant of cylindric coil portion 30 is set greater than the spring constant of coniform coil portion 29.In addition, the coniform coil portion 29 that spring constant is low spool 24 open reduced overall in the valve way be deformed into one plane and with the lower end sheet close contact of yoke 15.

Below, the effect of this mode of execution is described.

When engine warm-up turns round, by solenoid 14 is switched on, plunger 21 overcomes the active force of helical spring 28 and is adsorbed in fixed iron core 16, become the full-gear that spool 24 is left from valve seat 10, make thus conducting between the upstream portion 3a of bypass 3 and the downstream portion 3b, the air inlet that therefore can provide Quick air to migrate to motor by this bypass 3.In addition, after warm-operation is complete, by cutting off the energising to solenoid 14, plunger 21 becomes the active force that utilizes helical spring 28 and makes spool 24 be seated at the full-shut position (with reference to Fig. 2) of valve seat 10, owing to cut off between the upstream portion 3a of bypass 3 and the downstream portion 3b, therefore the air inlet of common idle running usefulness can be provided to motor on every side by the throttle valve 2 of idle running aperture.

In addition, when the making error owing to the machining error that comprises each parts and assembly error causes the parallel accuracy of the opposed faces of spool 24 and valve seat 10 to have deviation, spool 24 is seated at valve seat 10 at a slant when its full cut-off, it is bad that valve is closed in generation, and in solenoid valve V of the present invention, spool 24 is by the 24a of hub section that cooperates airtightly and be anchored on the second path axial region 21b of plunger 21, be seated at the 24c of the section of taking a seat of valve seat 10 with centering on the 24a of this hub section, and the flexible portion 24b formation that the 24a of this hub section and the 24c of section that takes a seat are coupled together in the mutual mode of deflection, with the back side close contact of this spool 24 and the spring seat board 23 of movable end that supports helical spring 28 can deflection on the first path axial region 21a of plunger 21, therefore exist in the situation of deviation in the parallel accuracy of spool 24 with the opposed faces of valve seat 10, as shown in Figure 3, can be by the 24a of hub section and the mutual deflection between the 24c of section of taking a seat, and the mutual deflection between spring seat board 23 and the first path axial region 21a, and the load that utilizes helical spring 28 makes the section 24c of taking a seat be seated at reliably valve seat 10, can guarantee the good valve state that closes.

And, because the 24a of hub section of spool 24 cooperates airtightly with the second path axial region 21b of plunger 21, and be clamped in airtightly between holding member 25 and the second 21b ' of annular stepped section, therefore by the 24a of hub section being cooperated merely and being anchored on the second path axial region 21b, can realize the sealing between spool 24 and the plunger 21, need not to arrange betwixt special sealed member, can help simplified structure.

In addition, form the annular slot 26 that centers on the 24a of hub section by the end face at spool 24, thereby the thinning part that utilizes the remaining spool 24 of annular slot 26 opposition sides consists of the flexible portion 24b of spool 24, therefore can utilize solid memder to consist of the spool 24 that is consisted of by the 24a of hub section, flexible portion 24b and the section 24c of taking a seat, can obtain this spool 24 by qurer.

In addition, because holding member 25 forms its outer diameter D 2 greater than the center-diameter D1 of the flexible portion 24b of ring-type, therefore, when spool 24 standard-sized sheet, can utilize holding member 25 to prevent from taking a seat the 24c of section owing to the attitude that deadweight, vibration, pressure etc. cause changes, the attitude stabilization in the time of therefore can also making next close valve.

On the other hand, helical spring 28 is made of single helical spring, described single helical spring has cylindric coil portion 30 directly same with this miner diameter end 29b and that spring constant is high at the miner diameter end 29b of the low coniform coil portion 29 of spring constant, therefore, this spring-load characteristic becomes two broken line part throttle characteristics as described below: open the valve initial stage at spool 24, depend on the low spring constant of coniform coil portion 29, after the middle aperture of spool 24, depend on the high spring constant of cylindric coil portion 30.

Therefore, open the valve initial stage at spool 24, being accompanied by spool 24, to open the increase of load of helical spring 28 of valve slow, can not be subjected to thus each parts the making error impact and make the smaller valve steady load that closes for spool 24 of helical spring 28, the spool 24 in the time of therefore can making solenoid 14 energising to open response valve good all the time.In addition, predetermined middle aperture position at spool 24, coniform coil portion 29 compressive strains become one plane and with the lower end sheet close contact of yoke 15, coniform coil portion 29 becomes non-action status after this, and only have cylindric coil portion 30 to move, the valve load of closing for spool 24 of helical spring 28 is increased suddenly, the spool 24 when solenoid 14 energisings under spool 24 full-gears are cut off to close response valve good.

And, the bigger diameter end 29a of the coniform coil portion 29 of helical spring 28 is supported in the lower end sheet 15b as the yoke 15 of spring seat board, thereby can make the flexible attitude stabilization of helical spring 28 and prevent from buckling, therefore can bring into play all the time suitable spring-load characteristic.

And, coniform coil portion 29 cooperates with location hole of the spring 20, described location hole of the spring 20 is formed at solenoid supporting mass 6 to consist of concentric mode with coil carrier 13 and plunger 21, and cylindric coil portion 30 is configured in the periphery of plunger 21 with concentric shape, thereby helical spring 28 always remains with plunger 21 and is concentric shape, owing in helical spring 28 stretches, can not apply lateral thrust to plunger 21, therefore the slip of plunger 21 becomes smooth and easy, can help the further raising of the switching responsiveness of spool 24.

In addition, be configured to be exposed to the location hole of the spring 20 of solenoid supporting mass 6 as the spring seat board of the bigger diameter end 29a of the coniform coil portion 29 of supporting owing to the lower end sheet 15b of the yoke 15 that is embedded in solenoid supporting mass 6, therefore the lower end sheet 15b of yoke 15 is also used as the spring seat board for coniform coil portion 29, can help simplified structure.

The invention is not restricted to above-mentioned mode of execution, can in the scope that does not break away from its purport, carry out various design alterations.For example, in spool 24, also can dispose annular slot 26 towards the valve seat side.In addition, also can consist of spool 24 by different members corresponding to connection and each function of the 24a of hub section, flexible portion 24b and the 24c of section that takes a seat.In addition, holding member 25 also can screw togather with the 3rd path axial region 21c.In addition, it is opposite up and down with mode of execution that helical spring 28 is turned into, and coniform coil portion 29 is configured in spool 24 sides, cylindric coil portion 30 is configured in yoke 15 sides.

Claims

1. solenoid valve, it comprises: valve body (5), it has valve seat (10); Solenoid supporting mass (6), it engages with this valve body (5); The spool that elastic material is made (24), it is seated at described valve seat (10); Plunger (21), it supports this spool (24), and this plunger (21) can be supported on described solenoid supporting mass (6) freely slidably; Helical spring (28), its around this plunger (21) and to described spool (24) to the direction application of force that is seated at described valve seat (10); And solenoid (14), it is installed on described solenoid supporting mass (6), and overcomes the active force of described helical spring (28) and make described plunger (21) to the standard-sized sheet side action of described spool (24) in when energising,

Described solenoid valve is characterised in that,

The the first path axial region (21a) that links to each other through the first ring-type end difference (21a ') is set continuously in the end of described valve seat (10) side of described plunger (21), and the second path axial region (21b) that links to each other through the second annular stepped section (21b ') is set continuously in the end of this first path axial region (21a), described spool (24) is by hub section (24a), section (24c) and the flexible portion (24b) of taking a seat consists of, described hub section (24a) cooperates airtightly and is anchored on described the second path axial region (21b), the described section of taking a seat (24c) is around above-mentioned hub section (24a) and be seated at described valve seat (10), described flexible portion (24b) couples together described hub section (24a) and the section of taking a seat (24c) in the mutual mode of deflection, spring seat board (23) can have on the bias play ground and cooperate with described the first path axial region (21a), described spring seat board (23) and described hub section (24a) and the section of taking a seat (24c) butt and the movable end of supporting described helical spring (28).

2. solenoid valve according to claim 1 is characterized in that,

Form annular slot (26) around described hub section (24a) at the end face of described spool (24), utilize the thinning part of a side opposite with this annular slot (26) of this spool (24) to consist of the flexible portion (24b) of described ring-type.

3. solenoid valve according to claim 1 and 2 is characterized in that,

In the end of described the second path axial region (21b) the 3rd annular stepped section (21c ') and the 3rd path axial region (21c) is set continuously, utilization is anchored on the described hub of airtightly clamping section (24a) of the holding member (25) of the 3rd path axial region (21c) and described the second annular stepped section (21b '), and this holding member (25) forms its external diameter (D2) greater than the center-diameter (D1) of the flexible portion (24b) of described ring-type.

4. solenoid valve according to claim 1 is characterized in that,

By wind spring wire rod and the movable end (28a) with described spring seat board (23) butt of described helical spring (28) is formed thickened end (28a) in intimate contact for several times, described thickened end (28a) has than at the large axial thickness (S2) in the gap (S1) of generation between described the first ring-type end difference (21a ') and the described spring seat board (23).