CN100363612C

CN100363612C - Solenoid valve

Info

Publication number: CN100363612C
Application number: CNB2004100927536A
Authority: CN
Inventors: 长谷浩文
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2004-01-19
Filing date: 2004-11-10
Publication date: 2008-01-23
Anticipated expiration: 2024-11-10
Also published as: CN1644913A; JP4294501B2; JP2005201413A

Abstract

The present invention provided a solenoid valve, avoiding thickening of a bobbin causing increase in the dimensions and weight of the solenoid valve, whereby preventing deformation of the bobbin in forming an armour. A coil formed body 15 of a solenoid part 5 in the solenoid valve 1 is composed of: a substantially cylindrical bobbin 19; a coil 21 wound round the outer peripheral surface 19a of the bobbin 19; a terminal 23 integrated with the bobbin 19; a substantially closed-end cylindrical core 25 constituting a magnetic circuit; and an armour resin part 27 integrating the core 25 and the bobbin 19 with the terminal 23. The front end face 31 of the bobbin 19 and the rear face 41a of a flange part 41 of the core 25 are made to closely adhere to each other.

Description

Solenoid valve

Technical field

For example the present invention relates to that the switching of Aspirating valves, outlet valve to internal-combustion engine (hereinafter to be referred as motor) is regularly controlled, control for the delivery volume of the wet goods fluid of valve timing adjusting device, can be used as the solenoid valve that oil controlling valve door (hereinafter to be referred as " OCV ") etc. uses.

Background technique

Solenoid valve in the past roughly be by be arranged in valve portion that valve rod is slided, with the described valve rod of this valve portion connect, with spool being constituted that described valve rod can move towards the electromagnet portion that the axle direction of described frame moves.Here, electromagnet portion has for the coil that produces electromagnetic force and roughly is bobbin cylindraceous for this coil of reeling.Central authorities at bobbin form penetration hole, and 2 stator arrangement that will constitute magnetic circuit usually become to be pressed into or to insert from axial both sides.On bobbin, form and carry out being pressed into the hole from the terminal of external power source, most cases be with the bobbin of coiling coil and terminal as inserting member, encapsulate integrally formedly with the form that comprises wiring terminal, portion is covered with potting resin.

But, bobbin with the coiling coil carries out in the solenoid valve of structure in package shape as inserting member like this, because the forming pressure when in package shape directly acts on axle direction one end face of bobbin, therefore, in the axle direction generation strain deformation of bobbin.In case produce the distortion of strain etc., the thinner wall section that just might cause bobbin crack, insert the deterioration of the assembly precision between the construction element of the iron core in the bobbin etc. or because of misleading of being wound in that phase mutual friction between the coil on the bobbin peels off the tunicle of coil to produce etc., cause electromagnet portion is produced fatefulue multiple unfavorable condition.

For fear of producing described unfavorable condition, can consider for example to increase the wall thickness of bobbin and the method that increases mechanical strength.But, revert to original maximization again as solenoid valve, its size, the weight of the product of such thickening of wall thickness.

Disclose the solenoid valve of the bobbin that is provided with each step to the patent documentation 3 at patent documentation 1, formed for which bobbin all direct acting structure of forming pressure when being shaped.

[patent documentation 1] Japanese patent laid-open 10-266923 communique (Fig. 2)

[patent documentation 2] Japan Patent spy opens 2000-130629 communique (Fig. 2)

[patent documentation 3] Japanese patent laid-open 11-118063 communique (Fig. 1)

Summary of the invention

The present invention constitutes for the shortcoming that overcomes in the solenoid valve in the past, its purpose is, a kind of solenoid valve is provided, and its structure can prevent to cause the wall thickness of the bobbin that its size, weight increases to thicken, and can prevent the unfavorable conditions such as distortion of bobbin when in package shape.

Solenoid valve involved in the present invention is the valve portion that in the frame with a plurality of fluid bore valve rod is slided by being arranged in; Connect with the described valve rod of this valve portion, but the axle that integrity moves constitutes towards the electromagnet portion that the axle direction of described frame slides, described electromagnet portion has: what central authorities were provided with penetration hole roughly is bobbin cylindraceous, be wound in the coil on the periphery of this bobbin, be provided with the iron core that tube portion and a end in this one in the described penetration hole that is arranged in described bobbin form and contact with an axial end face of described bobbin with flange, an axial end face of described bobbin portion makes described iron core and the incorporate potting resin of described bobbin portion with formation in package shape under the state of the flange that is adjacent to described iron core, its characteristics are, peripheral edge at the lip part of iron core is formed with a plurality of notchs, the bottom outside dimension of this notch equals the outside dimension of an axial end face of bobbin, or sets greatlyyer than this size.

According to the present invention, make described iron core and the incorporate potting resin of described bobbin portion make structure in package shape owing to forming under the state of being close to lip part unshakable in one's determination at an axial end face that makes bobbin, so the gap between the lip part of axle direction one end face that can eliminate bobbin and iron core, can prevent when in package shape that whereby forming pressure from directly acting on the bobbin and prevent the distortion of bobbin reliably.Therefore, can prevent reliably thinner wall section at bobbin crack, with insert bobbin in the construction element of iron core etc. between assembly precision deterioration or be wound between the coil of bobbin mutual friction mutually and the tunicle of coil peeled off and the generation of multiple unfavorable conditions such as misleading of producing.In addition, owing to can avoid the thickening of the wall thickness of bobbin, the size of the increase solenoid valve that can be avoided thereupon to be produced, the effect of weight.

Description of drawings

Shown in Figure 1 is the sectional view of this example 1 solenoid valve internal structure.

Fig. 2 is the plan view of the construction element of solenoid valve iron core before in package shape shown in Figure 1 etc.

Fig. 3 is the III-III line sectional view of Fig. 2.

The sectional view of the construction element such as iron core when Fig. 4 is solenoid valve shown in Figure 1 in package shape.

Embodiment

The sectional view of the solenoid valve internal structure that relates to example 1 of the present invention shown in Figure 1, the plan view of the construction element of the iron core in shown in Figure 2 the is solenoid valve shown in Figure 1 before in package shape etc., Fig. 3 is the III-III line sectional view of Fig. 2, and Fig. 4 is the sectional view of the construction element such as iron core when in package shape in the solenoid valve shown in Figure 1.In addition, in Fig. 1 with the right side as the place ahead, with the left side as the rear in, in Fig. 3 and Fig. 4, be the place ahead, be the rear with the downside with the upside.

As shown in Figure 1, solenoid valve 1 is that the electromagnet portion 5 that is is roughly opened and closed by this valve portion 3 of valve portion 3 and control constitutes.

Valve portion 3 is roughly by having roughly being of penetration hole 7a frame cylindraceous 7 and be arranged in the penetration hole 7a of this frame 7 and can constitute at the roughly cylindrical valve rod 9 that its axle direction (arrow A direction or arrow B direction) slides.Forming a plurality of (in this example 1, being 5) fluid bore 11 on the outer circumferential face of frame 7.These fluid bore 11 are connected with the lead angle hydraulic chamber (not illustrating) of valve timing adjusting device (not illustrating), slow angle hydraulic chamber (not illustrating) and oil hydraulic pump (not illustrating) or food tray (not illustrating).Therefore, utilize the opening area of position relation, each fluid bore 11 of the valve rod 9 in the frame 7 to change and form controlling the wet goods fluid to discharge capacity.

In addition, on frame 7, form aft bulkhead 7b, between the rearward end 9a of this aft bulkhead 7b and valve rod 9, be furnished with and make valve rod 9 frequent helical springs 13 to the arrow A direction application of force at the rear portion of penetration hole 7a.Be formed with on the aft bulkhead 7b when valve rod 9 when the arrow B direction moves, will result from the tap hole 7c that the back pressure that produces between the rearward end 9a of aft bulkhead 7b and valve rod 9 is discharged to the outside.Especially, form the large diameter base end part 7d that can combine, form the fitting seat 7e of portion at the rear portion of this large diameter base end part 7d with electromagnet portion 5 at the forefront of frame 7.

Electromagnet portion 5 is by the coil forming body; Shell 17 with this coil forming body function of protection, formation magnetic circuit roughly constitutes.The coil forming body, roughly be by roughly be bobbin 19 cylindraceous, be wound in coil 21 on the outer circumferential face 19a of this bobbin 19, because of being pressed into terminal 23 that described bobbin 19 is fixed, constituting the iron core 25 that there is bottom tube-like roughly being of magnetic circuit, this iron core 25 being constituted with the incorporate potting resin of described bobbin 19 and terminal 23 portion 27.

Form the penetration hole 29 that axially runs through in the central authorities of bobbin 19, form the front-end face (an axial end face) 31 that extends to the diametric foreign side of bobbin 19 at the forefront of this penetration hole 29.Remove beyond the treated section that the winding displacement between coil 21 and the terminal 23 is handled, front-end face 31 forms flat condition.Form the rearward end 33 of extending at the rear portion of penetration hole 29, on this rearward end 33, be formed with the depressed part of accepting potting resin portion 27 35 that cave in the side in diametric to towards described diametric foreign side.In addition, on rearward end 33, form groove 37 for the wall thickness homogenization that makes potting resin portion 27 along peripheral direction.In addition, the part of terminal 23 and potting resin portion 27 constitutes the wiring terminal portion that is electrically connected between that power and the external power supply (not illustrating) to electromagnet portion 5.

The inboard of the central rear unshakable in one's determination 25 is formed with end tube portion (tube portion) 39, and the toe lateral of the outer circumferential face 25a unshakable in one's determination 25 forms the lip part 41 that extends to diametric foreign side.The back of lip part 41 (outer circumferential face) 41a forms the flat condition identical with the front-end face 31 of bobbin 19, when iron core 25 is pressed in the penetration hole 29 that runs through bobbin 19 and when being fixed, can be close to the front-end face 31 of bobbin 19.In addition, on the peripheral edge of lip part 41, be formed with a plurality of (being 3 in this example 1) notch 43, these notchs when in package shape are that boundary is guaranteed resin flow between the coil coiling portion of the wiring terminal portion of front and back and bobbin with the iron core.In addition, in order to arrange the O shape circle of the promising inside and outside airtight usefulness of guaranteeing electromagnet portion 3, and on the toe lateral end face of unshakable in one's determination 25 lip part 41, form the end difference of integrality by potting resin portion 27.Here, the bottom of this notch 43, promptly apart from the peripheral edge of lip part 41 farthest the outside dimension of part be set to and equate with the outside dimension of the front-end face 31 of bobbin 19 or greater than this size.Therefore, as shown in Figure 2, in fact the front-end face 31 of bobbin 19 is capped because of unshakable in one's determination 25 lip part 41, so resin flow can not directly act on the front-end face 31 of bobbin 19.

In the penetration hole 29 of the bobbin 19 of the coil forming body that constitutes like this, be furnished with axle 45.Being pressed into spool 47, this spool 47 of being fixed with as movable piece at assigned position on axle 45 the central outer circumferential face is housed inside with its outer circumferential face and has in the inner peripheral surface that end tube portion 39 is arranged of iron core 25 of certain interval.Axle 45 front end 45a and rearward end 45b respectively with bearing components 49,50 sliding contacts that are arranged in assigned position rear portion side, that be pressed into the inner peripheral surface that is fixed in axle sleeve 51 in unshakable in one's determination 25 the penetration hole that end tube portion 39 and bobbin 19 are arranged 29, also supported.On the outer circumferential face of the rearward end 45b of axle 45 at assigned position, be arranged in to be pressed on the inner peripheral surface of axle sleeve 51 of the rear portion side in the penetration hole 29 of bobbin 19 and be fixed with bearing components 50.Axle sleeve 51 has and the contacted magnetic attachment 51a of portion of the inner peripheral surface of penetration hole 29 for the cross section is the roughly member of H font.The rearward end 51b of axle sleeve 51 is pressed in the mesopore 53a that is fixed in the plate 53 roughly in the form of annular discs of distinguishing valve portion 3 and electromagnet portion 5.Plate 53 is a steel plate punching member, and its periphery is by the major diameter base end part 7d of the coaxial frame 7 that is held on valve portion 3 and between the border end difference of formed rear end, the rear end of aftermentioned shell 17 thinner wall section 17c and housing section 17a.In addition, axle 45 rearward end 45b is with respect to the front end 9b of the valve rod 9 of valve portion 3 butt joint on coaxial, valve rod 9 when electromagnet portion 5 switches on slidably distance can only be corresponding to the sliding distance of axle 45.

As shown in Figure 1, shell 17 be by roughly be housing section 17a cylindraceous, be formed at this housing section 17a front end front end heavy section 17b, thinner wall section 17c generally constitutes in formed rear end, the rear end of housing section 17a.Assigned position at the outer circumferential face of housing section 17a is welded with the carriage 55 that roughly is the L font.On carriage 55, form the bolt hole 55a that uses, intert bolt (not illustrating) in order to go up Motionless electromagnetic valve 1 at motor (not illustrating).Front end heavy section 17b bending is to the inside compressed O shape circle 57 between the potting resin portion 27 of lip part 41 in being arranged in the coil forming body, that cover iron core 25, forms the structure of clamping.Rear end thinner wall section 17c is by bending, and the major diameter base end part 7d of the frame 7 that the coil forming body is supported by plate 53 keeps.

Then, describe about action.

At first, when (during non-energising) do not switched on by the electromagnet portion 5 to solenoid valve 1, as shown in Figure 1, utilize helical spring 13, to the arrow A direction application of force, axle 45 stops at the position that the ear end face of the front-end face of spool 47 and bearing components 49 connects to the valve rod 9 of valve portion 3 and the axle 45 that connects with it.Then, when solenoid valve 1 is energized, because the magnetic force that is produced from coil 21 makes spool 47 move to the arrow B direction.At this moment, make spool 47 by being pressed into fixing axle 45, valve rod 9 also overcomes the application of force of helical spring 13, just moves at predetermined distance, thus the opening area of the fluid bore 11 of frame 7 is controlled.

Then the manufacture method to relevant coil forming body describes.

At first, as shown in Figures 2 and 3, coil 21 is a number of turns coiling in accordance with regulations on the outer circumferential face 19a of the bobbin behind the ester moulding 19, and unshakable in one's determination 25 are pressed in the penetration hole 29 that is fixed in bobbin 19.Then, terminal 23 is pressed into bobbin 19, in the fusion mode coil 21 is fixed in this terminal 23, at assigned position terminal 23 bendings bending is formed assembly body.Then, the forming die 63 that preparation is made of upper die tooling 59 and bed die 61 inserts described assembly body in the bed die 61 under the state of location as shown in Figure 4.At this moment, back (outer circumferential face) 41a of unshakable in one's determination 25 lip part 41 is when front-end face (upper-end surface) 61a with bed die 61 carries out butt, and unshakable in one's determination 25 the ear end face that end tube portion 39 is arranged (axle direction other end) 39a and the central inner bottom surface 61b of bed die 61 connect.In addition, the front-end face 31 of the bobbin 19 of coil forming body forms flat condition simultaneously with the back 41a of unshakable in one's determination 25 lip part 41, and, be close to the degree that becomes not produce the gap between the two.

Then, upper die tooling 59 is put on bed die 61, from the cast gate 65 encapsulation molding resins of upper die tooling 59.Cast gate 65 is formed near the position of the terminal 23 that constitutes wiring terminal portion.The resin that injects from cast gate 65 arrives unshakable in one's determination 25 lip part 41 by the space in the upper die tooling 59, and then forming pressure acts on lip part 41.But at the front-end face 31 of the bobbin 19 of the back 41a that is close to lip part 41, forming pressure is directly effect.In addition, if forming pressure acts on lip part 41, then unshakable in one's determination 25 because of the pushing that is subjected to forming pressure retreats, but this moment, and the ear end face 39a that end tube portion 39 is arranged of iron core 25 is by firmly by on the central inner bottom surface 61b that is pressed in bed die 61.Thus, act on unshakable in one's determination 25 almost mould 61 dispersions downwards of forming pressure, so can avoid forming pressure to directly act on bobbin 19.

On the other hand, arrive the shaping resin of lip part 41, by through being formed at a plurality of notchs 43 of unshakable in one's determination 25 lip part 41, making a circulation in front-end face 31 grades of bobbin 19, flow to the space in the bed die 61, surround bobbin 19 and coil 21 around, form potting resin portion 27.Thus, resin flow, the pressure that promptly is shaped can not directly act on the front-end face 31 of bobbin 19.

As mentioned above, according to this example 1, because the structure that the back 41a of the front-end face 31 that forms the bobbin 19 make the coil forming body and unshakable in one's determination 25 lip part 41 is close to, therefore, can not have the gap between the two, prevent whereby that the forming pressure when in package shape from directly acting on bobbin 19, can prevent the distortion of bobbin 19 reliably.Can prevent reliably bobbin 19 thinner wall section crack, and insert the assembly precision between the construction element of bobbin 19 inner iron cores 25 etc. deterioration or, be wound in the coil 21 phase mutual friction of bobbin 19 and the tunicle of coil 21 produced peel off so that poor flow etc. the generation of all unfavorable conditions.The wall thickening of bobbin 19 can be avoided whereby, the size of avoiding consequent increase solenoid valve 1, the effect of weight can be played.

According to this example 1, owing to be formed at that the outside dimension of notch 43 bottoms of unshakable in one's determination 25 lip part 41 is configured to equate with the outside dimension of the front-end face 31 of bobbin 19 or greater than the structure of this size, so not only shaping resin can flow through swimmingly, the direct effect of shaping resin can also be avoided, the effect that prevents that reliably bobbin 19 from deforming can be played whereby for the front-end face 31 of bobbin 19.

According to this example 1, when in package shape, bear in the iron core 25 of forming pressure, owing to constitute the ear end face 39a that the part of the bed die 61 of shaping die 63 is born the back 41a of lip part 41 and end tube portion 39 is arranged, therefore, unshakable in one's determination 25 retreat because of forming pressure is urged, unshakable in one's determination 25 the ear end face 39a that end tube portion 39 is arranged is by firmly by on the central inner bottom surface 61b that is pressed in bed die 61, thus, the forming pressure that acts on iron core 25 can be disperseed to bed die 61, can play and avoid forming pressure to directly act on the effect of bobbin 19.

Claims

1. a solenoid valve comprises: the slidably valve portion of valve rod is set in having the frame of a plurality of fluid bore; Connect, make the axle that can move with described valve rod towards the electromagnet portion that the axle direction of described frame slides with the described valve rod of this valve portion, described electromagnet portion has: central authorities are provided with the bobbin roughly cylindraceous of penetration hole; Be wound in the coil of this bobbin periphery; Have tube portion and iron core in the described penetration hole of being located at described bobbin at formation of an end of this one and the lip part that contacts with an axial end face of described bobbin; And be adjacent under the state of lip part of described iron core, at the axial end face of described bobbin, make described iron core and the incorporate potting resin of described bobbin portion by formation in package shape, it is characterized in that, peripheral edge at the lip part of described iron core is formed with a plurality of notchs, the bottom outside dimension of this notch equals the outside dimension of an axial end face of bobbin, or sets greatlyyer than this size.

2. the described solenoid valve of claim 1 is characterized in that, bears when in package shape in the iron core of forming pressure, with the outer circumferential face of a part of support lug portion of forming die and the axle direction other end of tube portion.