EP0861493B1 - Systeme d'electro-aimant de levage - Google Patents

Systeme d'electro-aimant de levage Download PDF

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Publication number
EP0861493B1
EP0861493B1 EP96937253A EP96937253A EP0861493B1 EP 0861493 B1 EP0861493 B1 EP 0861493B1 EP 96937253 A EP96937253 A EP 96937253A EP 96937253 A EP96937253 A EP 96937253A EP 0861493 B1 EP0861493 B1 EP 0861493B1
Authority
EP
European Patent Office
Prior art keywords
armature
lifting magnet
magnet arrangement
accordance
spring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP96937253A
Other languages
German (de)
English (en)
Other versions
EP0861493A1 (fr
Inventor
Rainer Imhof
Torsten Witte
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bosch Rexroth AG
Original Assignee
Mannesmann Rexroth AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE1995142642 external-priority patent/DE19542642A1/de
Application filed by Mannesmann Rexroth AG filed Critical Mannesmann Rexroth AG
Priority to EP96937253A priority Critical patent/EP0861493B1/fr
Priority claimed from PCT/EP1996/004667 external-priority patent/WO1997018568A1/fr
Publication of EP0861493A1 publication Critical patent/EP0861493A1/fr
Application granted granted Critical
Publication of EP0861493B1 publication Critical patent/EP0861493B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • the invention relates to a solenoid arrangement for Control of a pressure or directional valve according to the generic term of claim 1.
  • Solenoid assemblies are used to control hydraulic Components, such as switching or proportional valves, Directional or pressure valves and slide or Seat valves used.
  • types can be with DC magnet and with AC magnet differentiate, each with the magnetic armature in air (“dry” magnet) or in oil (“wet” magnet) switches. That is, the anchor space is oil in the latter case filled and relieved to the tank.
  • proportional valves so-called proportional magnets are used, which belong to the group of DC solenoids and one Output variable proportional to the electrical input signal Generate (force or path).
  • stroke-controlled magnets and force-controlled Magnets the latter with the magnetic force negligible stroke change by changing the Current is regulated, while in the former the location of the Anchor (hub) is regulated.
  • Fig. 1 shows a view of a conventional solenoid assembly with pushing actuator, at a direct current magnet in oil is used.
  • Such a lifting magnet arrangement 1 essentially consists from a magnet housing 2 into which a pole tube 4 is pressed with a wound coil 10.
  • the Pole tube serves to limit the coil space as well for axial housing closure.
  • This function takes on the other end face a cover plate 8, which may (e.g. to intervene in the magnetic force system) also in Ring 9 and cover 8 can be divided.
  • the solenoid 10 is via a connection 12 on the housing 2 can be connected to a current / voltage supply.
  • the pole tube 4 has an axial bore in which an armature 16 is guided axially movable.
  • the anchor bears on its left end in FIG. 1 16 a tappet 18 which emerges from the pole tube 4 in the axial direction protrudes and in the embodiment shown Transport purposes from a protective cap 20 (dashed indicated in Fig. 1) can be covered.
  • the axial bore 14 is radially downgraded in the area of the plunger 18, each by design a guide section or at least to form a receiving space for the plunger 18.
  • the armature 16 has a coaxial rod 22 attached to it, which protrudes into the interior of the cap 8.
  • the front end portion of the pole tube 4 is formed by a stop piece 24 which in the pole tube 4th is screwed in and an axial stop for the anchor 16 forms.
  • the rod 22 passes through the stop piece 24 in the middle and has a threaded section at its end section 22, on the one spring plate 26 as an anchor-side abutment is screwed on.
  • a compression spring engages on this 28, the other end portion of the adjacent End face of the stop piece 24 as the housing side Abutment is supported.
  • the spring plate 26 (Anchor-side abutment) thus has a larger one Axial distance from the armature space as the axial stop (abutment on the housing side).
  • the axial bore 14, i.e. the one formed by it Anchor space, the space encompassed by the protective cap 20 and the space enclosed by the cover plate 8 in extension of the pole tube 4, in which the compression spring 28 is arranged (spring chamber) are filled with oil, this oil chamber via a line, not shown, with a tank connection (also not shown) is connected, so that inside of the solenoid always a constant oil pressure (Tank pressure) prevails.
  • the preload of the spring depending on the force-stroke characteristic of the magnet can be set.
  • the cap 8 be so that the oil in this room from the solenoid assembly 1 runs out. That is, in the solenoid the predetermined working pressure does not prevail (Tank pressure) but the ambient pressure (air pressure), so that the adjustment made at air pressure may be at working pressure, i.e. with oil-filled solenoid arrangement can be incorrect, and thus inaccuracies leads in the valve control.
  • the invention is based on the object to create a solenoid assembly with minimal simple adjustment is possible without entering the hydraulic system intervene.
  • the adjustment device for change the spring preload by shifting the abutment on the housing side from the housing of the lifting magnet arrangement The basic adjustment can be made oil-tight can also be made with an impacting magnet without that an opening of the solenoid housing is required. That means that the basic adjustment is done inside of the solenoid those pressure ratios as they also be present when using the arrangement.
  • the force adjustment can thus be low in terms of device technology Carry out much more effort.
  • the adjustment device due to the constant accessibility of the adjustment device, or more precisely the operating section the adjustment device also a quick readjustment is possible without dismantling the solenoid assembly, so that the adjustment process is easier compared to conventional solutions, is more accurate, faster and oil-free. The latter leads to cleaner assembly and less Ecological damage.
  • the training according to claim 3 is designed as a cap, which in an inner bore of a bush-shaped stop piece is screwed in, the front end of the Solenoid housing forms.
  • the axial length of the solenoid arrangement can be reduce if the compression spring at least in sections is encompassed by the cap.
  • the axial stop biased against the cap by a spring element be so that an axial separation of the axial stop and Cap can be prevented due to the action of the compression spring is.
  • the axial stop can also be made in one piece be formed with the cap.
  • the Axial stop are connected to the fastening cap, this connection preferably being made by pressing.
  • An easy way to attach an emergency button is that in the operating section or an externally accessible emergency actuation bolt in the adjustment cap is guided axially displaceably in the event of a power failure, a manual axial displacement of the armature can be brought about.
  • the lifting magnet arrangement according to the invention can for both stroke and force controlled Solenoids are used and is suitable in principle for controlling switching valves and proportional valves.
  • the lifting magnet arrangement 1 in turn has a pole tube 4, which has an axial bore 14, the one on the right in FIG. 2 Section is expanded radially and an anchor space 30th trains.
  • An armature is axially displaceable in the armature space 30 16 guided, at the left end portion of a plunger 18 which has a radially narrowed section 32 the axial bore 14 passes through.
  • the cantilevered end of the plunger 18 is spherical or frustoconical trained contact surface 34 provided, via which the Tappet 18 can be brought into contact with an actuating element of the valve to be controlled (not shown).
  • armature 16 In armature 16 are two to the axis of the solenoid assembly 1 inclined through holes 38 are formed, over which the subspaces divided by the anchor 16 of the anchor space 30 are interconnected. At a Lifting movement of the armature 16 can take place through the through holes 38 an equalizing flow take place so that the oil from the shrinking subspace to the other subspace can cross.
  • a depression 36 is formed, one in the end face Rod 22 is screwed.
  • the right end section of the Pole tube 4 is closed by a stop piece 24, that is firmly inserted into the end section of the pole tube 4 is. (In the exemplary embodiment, the stop piece is 24 screwed into the pole tube 4 via a threaded section).
  • a stop surface 40 for the adjacent one End face of the armature 16 formed so that when the armature 16 runs onto the stop surface 40 Axial movement to the right in Fig. 2 is limited.
  • a hub-shaped surface adjoins the stop surface 40 Section, which is penetrated by the rod 22, so that this built into the interior of the socket Stop piece 24 protrudes.
  • the stop piece 24 has a following the hub-shaped section widening receiving bore 42, a washer spring assembly 44 is supported on the end face thereof is.
  • An axial stop ring is coaxial with the disk spring assembly 44 46 received in the receiving bore 42.
  • the 2 open end of the stop piece 24 is through an adjustment cap 48 closed with the receiving bore 42 of the connector 24 in threaded engagement stands so that the end portion of the plate spring assembly 44 and the stop ring 46 penetrating rod 22 of the adjustment cap 48 is gripped.
  • the radial width of the axial stop ring 46 is included greater than the adjacent wall thickness of the adjustment cap 48 formed so that the axial stop ring 46 projects radially inwards towards the spring rod 22.
  • On this radially projecting section of the axial stop ring 46 is a compression spring 28 with an end portion supported. The other end section lies on one Spring plate 26, which is stepped back to a radial End section of the spring rod by means of a fastening nut 50 is set.
  • the spring rod 22 in addition End portion of a slot that allows the spring rod to be screwed in 22 allows in the anchor 16.
  • the compression spring 28 conical, so that the bearing surface on the spring plate 26 has a smaller diameter than that on the axial stop ring 46.
  • the same function can be done but can also be realized with a cylindrical compression spring.
  • the anchor space 30 and the stop piece 24 and the adjustable cap 48 limited spring space are in the installed state the lifting magnet arrangement 1 filled with hydraulic oil, said spaces via the axial bore 32 of the Pole tube are connected to a tank.
  • the axial fixation of the bobbin 6 takes place via a union nut 52, which is screwed to the outer circumference of the stop piece 24 is and with a jacket section the neighboring End portion of the pole tube 4 engages and the bobbin 6 against a valve housing (not shown) presses.
  • the adjustment cap is in place 48 with her removed from the plate spring assembly 44 End section axially from the stop piece 24, so that through this part an externally accessible operating section 54 is formed by an operator by hand or using a simple tool is adjustable.
  • section 54 To protect against unauthorized actuation of the adjustment device it is possible to operate section 54 with an additional protective cap (not shown) cover, which are attached to the nut 52 can.
  • a disc 56 is provided, which acts as an axial stop for the Armature 16, so that thereby its axial movement in Fig. 2nd is set to the left.
  • a further rough setting can be made possible be that the spring plate 26 over washers and by adjusting the fastening nut 50 accordingly the axial position of the spring plate 26 is additionally adjustable is.
  • Another variant of the lifting magnet arrangement according to the invention consists of the axial stop ring 46 is integrally formed with the adjustment cap 48, so that in this case the plate spring assembly could be omitted.
  • the adjustment cap 48 in be open to the compression spring 28, and to be able to mount the spring plate 26.
  • adjustment cap 48 can perform additional functions e.g. for manual operation (so-called emergency hands) include.
  • FIG. 3 shows a further variant of an actuating section 54 for adjusting the spring preload shown.
  • the armature 16 is guided axially displaceably in the pole tube 4 and provided with a spring rod 22 on which the compression spring 28 attacks.
  • the adjustment cap 148 For emergency actuation of the armature 16 - for example in case of power failure - to enable isc in the outside accessible end portion of the adjustment cap 148 has a guide bore 64 formed in which an emergency operating bolt 70 is guided axially.
  • This emergency actuation bolt 70 is about the preload of the sealing ring 78 held in one position.
  • This emergency operating pin 70 can be externally - i.e. in the representation of Figure 3 from the right - with a suitable tool can be moved until it comes into contact arrives at the spring rod 22 of the armature 16 to in this to bring its shift position.
  • the adjustment cap 148 is adjusted via a Hexagon socket 76, which approximately extends the guide bore 64 is arranged.
  • Due to the configuration of the compression spring setting according to the invention can the basic adjustment of the solenoid assembly done without opening the magnet housing, so that the setting is done with an oil filling of the housing can and thus prevents adjustment errors.
  • a lifting magnet arrangement with an impact Direction of action 1 in which the setting of a Armature 16 in its basic position biasing compression spring 28 via an actuating section led out of the magnet housing 54 can be done.
  • an opening of the magnet housing for adjustment is an opening of the magnet housing for adjustment not necessary, so that the adjustment process at one anchor running in oil is feasible.

Landscapes

  • Magnetically Actuated Valves (AREA)

Claims (11)

  1. Système d'électro-aimant de levage pour la commande d'une valve, notamment d'une soupape de refoulement ou d'un distributeur, comportant un corps de bobine (6) et un induit mobile (16) qui est guidé de manière à pouvoir se déplacer dans le compartiment de l'induit (30) d'un boítier et est précontraint au moyen d'un ressort de pression (28) dans une position de base hors de laquelle il peut être déplacé par la commande du corps de bobine (6), le ressort de pression (28) étant appuyé côté boítier contre un aboutement (46; 146) et contre un aboutement (26) côté induit, qui présente une plus grande distance axiale par rapport à l'espace de l'induit (30) que l'aboutement (46; 146) côté boítier, et comportant par ailleurs un dispositif de réglage (46, 48) moyennant lequel la précontrainte du ressort de pression peut être réglée,
    caractérisé en ce que
    le dispositif de réglage (46, 48) présente une section d'actionnement (54) qui sort du boítier de manière substantiellement étanche à l'huile et moyennant laquelle l'aboutement (46; 146) côté boítier peut être réglé.
  2. Système d'électro-aimant de levage selon la revendication 1, caractérisé en ce que l'induit (16) présente à une section d'extrémité une barre (22), à laquelle l'aboutement (26) côté induit est formé, auquel s'attaque l'extrémité du ressort d'ajustage ou de pression (28), alors, que l'autre extrémité est appuyée contre une butée axiale (46; 146) en tant qu'aboutement côté boítier, qui peut être réglée moyennant la section d'actionnement (54).
  3. Système d'électro-aimant de levage selon la revendication 2, caractérisé en ce que la barre (22) s'immerge dans une pièce de butée (24) en forme de douille destinée à l'induit (16), pièce qui forme une face avant du boítier et dans l'alésage intérieur (42) de laquelle la butée axiale (46) du ressort de pression (28) est guidée, et que la section d'actionnement (54) est un capuchon de réglage (48) qui est vissé dans l'alésage intérieur (42) et dont la surface annulaire avant repose contre la butée axiale (46).
  4. Système d'électro-aimant de levage selon les revendications 2 ou 3, caractérisé en ce que l'aboutement (26) côté induit est enserré par le capuchon de réglage (48).
  5. Système d'électro-aimant de levage selon l'une quelconque des revendications 2 à 4, caractérisé en ce que la butée axiale (46) est précontrainte moyennant un élément à ressort (44) contre la section d'actionnement (54).
  6. Système d'électro-aimant de levage selon l'une quelconque des revendications 3 et 5, caractérisé en ce que l'élément à ressort est un groupe de ressorts à disques (44) qui est appuyé contre un épaulement radial de la pièce de butée (24).
  7. Système d'électro-aimant de levage selon l'une quelconque des revendications 3 à 4, caractérisé en ce que la butée axiale (146) est formée d'une pièce avec le capuchon de réglage (148).
  8. Système d'électro-aimant de levage selon l'une quelconque des revendications 3 ou 4, caractérisé en ce que la butée axiale (146) est fixée au capuchon de réglage (148).
  9. Système d'électro-aimant de levage selon l'une quelconque des revendications 2 à 6, caractérisé en ce que l'aboutement (26) côté induit est réglable par rapport à la barre de ressort.
  10. Système d'électro-aimant de levage selon l'une quelconque des revendications 3 à 9, caractérisé en ce que dans la section d'extrémité du capuchon de réglage (48, 148) éloignée de l'induit (16) un boulon d'actionnement de secours (70) est guidé de manière à pouvoir se déplacer axialment.
  11. Système d'électro-aimant de levage selon l'une quelconque des revendications précédentes, caractérisé en ce que l'électro-aimant de levage est un aimant de commutation ou proportionnel et est commandé par régulation de la course ou de la force.
EP96937253A 1995-11-15 1996-10-25 Systeme d'electro-aimant de levage Expired - Lifetime EP0861493B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP96937253A EP0861493B1 (fr) 1995-11-15 1996-10-25 Systeme d'electro-aimant de levage

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DE1995142642 DE19542642A1 (de) 1995-11-15 1995-11-15 Hubmagnetanordnung
DE19542642 1995-11-15
WOPCT/EP96/04343 1996-10-07
EP9604343 1996-10-07
PCT/EP1996/004667 WO1997018568A1 (fr) 1995-11-15 1996-10-25 Systeme d'electro-aimant de levage
EP96937253A EP0861493B1 (fr) 1995-11-15 1996-10-25 Systeme d'electro-aimant de levage

Publications (2)

Publication Number Publication Date
EP0861493A1 EP0861493A1 (fr) 1998-09-02
EP0861493B1 true EP0861493B1 (fr) 2000-04-19

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP96937253A Expired - Lifetime EP0861493B1 (fr) 1995-11-15 1996-10-25 Systeme d'electro-aimant de levage

Country Status (1)

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EP (1) EP0861493B1 (fr)

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EP0861493A1 (fr) 1998-09-02

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