CN1041868C

CN1041868C - Solenoid

Info

Publication number: CN1041868C
Application number: CN92113424A
Authority: CN
Inventors: J·A·内夫; R·A·法格里; E·P·扬森; M·E·罗伯特
Original assignee: MAC Valves Inc
Current assignee: MAC Valves Inc
Priority date: 1992-10-27
Filing date: 1992-10-27
Publication date: 1999-01-27
Anticipated expiration: 2007-10-27
Also published as: CN1086342A

Abstract

The present invention relates to a solenoid (10) which comprises a wire winding frame (22) of a rectangular hole (26), wherein an armature iron (18) with a rectangular cross section and an electrode element (13) are arranged in the hole, and the wire winding frame has a magnetic coil (30) wound on a tubular body of the wire winding frame, which has a rectangular cross section, and has an upper and a lower flanges (25, 24) for sealing both end parts of the coil; a tubular tube casing (43) is sealed at the surroundings of the wire winding frame, and a top and a bottom magnetic flux plates (31, 12) are respectively arranged on the surfaces of the upper and the lower tube casings; the magnetic flux plates are fixed on the upper and the lower flanges of the wire winding frame. A coil is sealed by material (45) for sealing, electric insulation and heat consumption, and thereby, the coil is electrically insulated from the magnetic flux plates, the tubular tube casings and a mounting bolt (49).

Description

Solenoid

The present invention relates to solenoid, in particular for the solenoid of operated microvalve or like.

EP0146951A2 discloses a kind of solenoid.This solenoid comprises the spiral shell shape armature pipe of hollow, can put people's screwed pipe shape coil, one end of pipe is being fixed static magnetic pole chipware, armature spare can axially slide in pipe, in one of these two products, has an axially extended groove, the end cross-sectional of another product is dwindled, can include in described groove and with the groove complementation, product with groove also has the truncated cone surface around the outside of radially extending of groove, thereby provide the concentricity of two members, this pipe has a nonmagnetic portion, extends with one heart with the slit that armature stroke is caused.The solenoidal shortcoming of this prior art is for solenoid when the given stroke has a given power, causes the solenoidal width of circular iron core structure obviously to increase.In the assembling of miniature valve, valve and solenoidal width are first important, though length and height also are important, they are strict unlike width.At present, need small-sized, compact and solenoid efficiently, it can be made with very narrow size, is used to operate that industry is made and the control circuit of assembly equipment.

The purpose of this invention is to provide a kind of small-sized, compact, efficiently with powerful solenoid, it overcomes the problem of the solenoidal aforesaid drawbacks of prior art.Solenoid comprises a bobbin made in accordance with the present invention, and it has the outer surface of an end for circular square-section, and core hole, bobbin with a same shape have an incorporate upper flange and an incorporate lower flange.Solenoid magnetic coil is twined around bobbin, a solenoid coil that has the square-section and have rounded ends is provided, it is the coil to every circle length growth of lead, this has caused strengthening the resistance of every circle, increase the number of ampere turns of coil, and increased the power that solenoid produced.Be installed in the tubular shell, this shell is rectangle on the cross section, and both ends open the bobbin estable, and it will be referred to as a shell after this.This shell is the magnetic flux carrier of a thin-walled, a pole element that has rounded ends and square-section is installed in the lower end in bobbin rectangular core hole slidably, pole element has holistic bottom flux plate, it closes the lower end of described shell, and the upper end of shell is blocked with magnetic flux delivery top board, this shell is fixed between top and bottom flux plate, and fastening means can be with any suitable mode, as by heating flux plate being formed on the bobbin flange.The armature sleeve pipe is slidably mounted in the upper end of bobbin, and it is rectangle on the cross section and has rounded ends, so that can be assemblied in slidably in the core hole of the same shape in the bobbin.The long armature that has the square-section and have a rounded ends is slidedly assemblied in the armature sleeve pipe.The inner of armature engages with a push rod, and this push rod assembles by the axis hole that is formed by pole element slidably.A top cover is installed on the flux plate of top, with and fastening aforesaid solenoid component on described valve or similar device.

The upper and lower side of armature has radial end face, when solenoid is energized, even armature is perk slightly, can guarantee that also solenoid fully replaces, the rectangular shape of the bobbin of coil has not only increased the number of ampere turns of coil, and increased the cross section and the surface area of armature and pole element, thereby can convert the number of ampere turns that increases to reinforcement.

Fig. 1 is the solenoidal top view of making according to principle of the present invention.

Fig. 2 is the solenoidal 2-2 cutaway view of seeing along the direction of arrow of Fig. 1.

Fig. 3 is the 3-3 horizontal cross of seeing along the direction of arrow of Fig. 2, has removed part on the figure.

Fig. 4 is the 4-4 horizontal cross of seeing along the direction of arrow of Fig. 2.

Fig. 5 is the 5-5 horizontal cross of seeing along the direction of arrow of Fig. 2.

Fig. 6 is the 6-6 cut away left side view of seeing along the direction of arrow of Fig. 1.

Referring now to accompanying drawing, especially Fig. 1 and Fig. 2 illustrate the solenoid of making by principle of the present invention with label 10 representatives.As shown in Figure 2, digital 11 labels, one pole element, it has the cross section of T shape in fact, and it is made up of a bottom transverse flux plate 12 and main pole plate 13.Axis hole 14 runs through magnetic pole 11 and forms, and is used for receiving slidably the push rod 15 of a routine, and push rod 15 has one and expands thick head 16, is used for and the valve plunger of valve and the mechanism's engagement that drives by solenoid 10.Numeral 17 indicates the inner of push rods 15, in service it engage with the radial bottom 20 of armature 18, armature is with suitable magnetic material manufacturing, for example powdered-metal.Numeral 19 indicates the top of pole element 11.Numeral 21 indicates armature 18 radial tops.

As shown in Figure 2, helix tube 10 comprises a general bobbin with label 22, and it comprises lower, transverse flange 24 and an integral upper lateral flange 25 of 23, one integral body of a long tube body.The coil support body 23 of coil has the cross section and the circular end of a rectangle shown in Figure 4 and 5.Running through this coil support body 23, to form one be the axle core hole 26 of square-section and rounded ends equally.Shown in Fig. 2,4 and 5, numeral 30 indicates a coil, and it forms by twining thin magnetic lead in a usual manner around bobbin body 23.The plastic material manufacturing that bobbin 22 usefulness are suitable.Shown in Fig. 2 and 3, solenoid 10 comprises the flux plate 31 at a top, and it is positioned at the top of bobbin upper flange 25, and the opening 38 (Fig. 2) and the circular end of a rectangle are arranged.

As shown in Figure 2, the bottom flux plate has two holes at least, and hole 33 has the conehead outer end as shown in the figure, and bobbin lower flange 24 has the integral extensions of similar number and divides 32, vertically with the hole 33 that passes outwards through the bottom flux plate.Top bobbin flange 25 also has at least one pair of epitaxial part 35, and they axially stretch and pass outwards through hole 36 and stretch, and hole 36 is passed top flux plate 31 and formed.The shell that has port or the shell 43 of a thin-walled are sleeved on drum stand in front and the coil block.Pole element structure 11 and top flux plate 31 and its drum stand flange assembling separately, and fastening by heating.Add thermosetting bobbin upper flange epitaxial part (32,35), form flush (34,37) with respect to the outer surface of separately flux plate.

Sleeve pipe 40 passes the opening 38 on the top flux plate 31 and falls in the core hole 26 of coil support body 23, realizes installing slidably.Sleeve pipe 40 has a flange 41 that forms around its top, and it is around the top of top flux plate 31 and be positioned at around the opening 38.Armature 18 is slidably mounted within the armature sleeve pipe 40, any suitable magnetic material manufacturing of armature sleeve pipe 40 usefulness.As use cold-rolled steel, the armature 18 that moves in its manipulation work, and the magnetic flux importing armature 18 from top flux plate 31.As going out in Fig. 3 optimal representation, armature sleeve pipe 40 has the inner rim 42 of the hole formed therethrough up and down of a rectangle, and has circular end.

Shown in Fig. 2,4 and 5, fill with suitable encapsulation or armoring material 45 inner space between coil 30 and the shell 43.Above-mentioned material is electrical insulator and sealant.Be used for preventing that coil 30 from making moist, and replaces air provides good transferring material for being heated on the solenoid interior zone.As shown in Figure 3, in order to inject encapsulating material 45, on top flux plate 31, have two holes 44.Solenoid component is placed on the locator, utilizes the suitable pin extend through whole assembly, so that encapsulating material 45 can be injected in the shell 43, and allows encapsulating material 45 to flow around pin, coming provides the hole for bolt 49.

As shown in figs. 1 and 6, top end cover with numeral 48 expressions is utilized the bolt 49 of a pair of suitable length to roll over and is fixed aforesaid solenoid structure imperially, this bolt is passed down through the hole (end illustrates) of top cover 48 and passes the hole 47 (Fig. 3) of top flux plate 31, be passed down through the suitable hole (end shows) of drum stand upper flange 25 and drum stand lower flange 24 then, to stretch by the hole 46 of bottom flux plate 12, and the screwed hole on the device that maybe will operate with valve body enters screw engagement.

Suitable encapsulant is a silicon compound, and as shown in Figure 2, solenoid 10 is equipped with an artificial operating means 50, and it is contained in the single order shape hole 51, and this shape hole, rank forms on the axial location on the top end cover 48.As shown in Figure 6, top end cover 48 has the electricity conduit 52 that a pair of integral body outwards stretches.Conduit 52 is split, and is that we opens on its outside end.The inside 54 of conduit 52 communicates by a pair of mating holes 53 (Fig. 2), and hole 53 forms by the inner of each spool 52 with by shell 43, and a conductor binding post 55 is placed in each conduit 52, links to each other with coil 30 in the binding post work.Socket connector 56 is installed on each wire binding post 55, and connector 56 links to each other with lead-in wire 57 successively.Socket connector 56 is had strong market potential by one and 59 removably is fixed on the position of binding post 55.Having strong market potential 59 is elastic arms, and they turn in downwards in the hole 58 of having strong market potential on the diapire of each conduit 52.

When using top cover 48, solenoid 10 can adopt straight direct current solenoid, or the interchange solenoid of also available common interchange switch rectification.Length and the narrow structure of rectangular-shaped solenoid 10 has more superiority than the prior art solenoid with round iron core structure.Solenoid 10 can be used for only having the solenoidal situation of narrow space mounting.For example, solenoid 10 can be made with very little width, width as 10 millimeters, be used for the occasion that spatial limitation does not allow the solenoid use of broad size, the square-section of the core of solenoid 10 provides such solenoid structure, and wherein the cross section of iron core and surface portion are preferably good, the electromagnetic wire of coil 30 twines around the peripheral helicoid around support body 23, compare with the periphery of the solenoid of circle coiling support body and to be lengthened out, the resistance of coil 30 is increased, thereby obtain preferred number of ampere turns.With this loop construction, have substantial increase on the magnetic force total amount that is produced by coil 30, thereby a kind of effectively low wattage and the short solenoid that impacts are provided, in fact shell 43 is around whole winding 30, and thin cross section is arranged, a more effective solenoid so just is provided.Aforesaid solenoidal structure provides an effective flux path, and here top flux plate 31 is fixed by the upper and lower end of relative shell 43 with bottom flux plate 12, thereby by these parts, sleeve pipe 40, pole element 13 and armature provide an effective flux path.Encapsulating material 45 is electric insulation between coil and interior outside magnetic spare and the construction bolt 49.In the lower end of armature 18 and the radiation surface on top 20 and 21 is flat, and along the major axis of the end of rectangular-shaped armature 18.

Claims

1. a solenoid (10), the coil (30) that has a bobbin (22) and twine thereon, bobbin (22) have a core hole (26) of the armature sleeve pipe of being made by magnetic conductive material (40) being housed in it, and it comprises:

Bobbin (22) has a body.And have top and bottom, have incorporate upper flange (25) and incorporate lower flange (24), the upper and lower end of their encapsulated coils;

Armature sleeve pipe (40) is installed in the upper port in bobbin core hole (26);

Armature (18) is installed in the armature sleeve pipe (40) movably;

Magnetic pole (13) is fixedly mounted in the lower end in bobbin core hole (26);

Top flux plate (31) is installed in the upper end of bobbin upper flange (25);

Bottom flux plate (12) stretches in the below of bobbin lower flange (24); And

Tubular envelope (43) with top and bottom open end is installed in around the coil, and keeps in touch between top and bottom flux plate;

It is characterized in that it is the core hole of rectangle that this body forms the cross section, this armature sleeve pipe (40), armature (18), pole element (13), tubular envelope (43) all have the square-section;

The top flux plate has an axis hole that runs through the square-section of formation, and is mounted by armature sleeve pipe (40);

Bottom flux plate (12) is incorporate with pole element (13), device for fastening (32,35), be used for top (31) and bottom (12) flux plate are fastened to the bobbin flange, bobbin (22), flux plate (31,12) and tubular envelope (43) are kept together;

A kind of sealing, electric insulation and encapsulating material heat conduction be placed in the tubular envelope (43) and be centered around coil (30) around; And

Solenoid (10) comprises a detachable top end cover (48) of installing.

2. solenoid (10) that limits as claim 1 is characterized in that:

Described top end cover (48) comprises being used for coil (30) is connected to electrical connector (52-59) on the lead-in wire (57) effectively.

3. solenoid (10) that limits as claim 1 is characterized in that:

Square coil frame core hole (26), armature sleeve pipe (40), armature (18) and pole element (13) all have circular both ends.

4. according to the solenoid (10) of claim 3 qualification, it is characterized in that:

At least a radial surface is formed on the bottom (20) of armature (18), is used for compensating for the perk of armature (18) when being energized at solenoid (10).