DE10003427A1 - Electromagnet for hydraulic valve, has pole with armature rod opening in coil core, magnetic armature on rod coil core divided near magnetic armature, and at least one electric coil near coil core - Google Patents

Abstract

The electromagnet has a pole (1) with a rod opening (16) for an armature rod (17) in a coil core (8,9) and a magnetic armature (23) on the rod. The coil core is divided near the magnetic armature. At least one electric coil (3) is arranged near the coil core. Two mutually coaxial electric coils can be used. Independent claims are also included for a magnet pole and for a hydraulic magnetic valve.

Description

The invention relates to a pole for a magnet, which ins is particularly usable in a hydraulic solenoid valve. The invention further relates to a magnet and a hy draulic solenoid valve.

In the case of the poles known in the prior art, von partly that they have a high inertia. Straight hydraulic solenoid valves are therefore complicated to operate. In addition, the poles known in the prior art high friction. It must also be mounted on it make sure that there are no air bubbles inside the An kerraums, because depending on the air content in the anchor space the poles known in the prior art have a change dynamic.

Furthermore, the poles known in the prior art disadvantageous that this was subject to noticeable wear gene.

It is therefore an object of the invention to provide a pole len, the low wear and high response has sensitivity. The pole to be made available for Air fractions in the anchor space are insensitive and simply open be built. It is also an object of the invention, one insofar improved magnets and an insofar improved tes hydraulic solenoid valve.

This task is the subject of the independent An sayings solved. Advantageous configurations result from the respective subclaims.  

The pole according to the invention has a magnetisable mate rial manufactured coil core with a longitudinal axis, on the an electrical coil can be provided. Then the runs Longitudinal axis substantially parallel to that inside the Coil core running magnetic field lines, which are due to a current flow through the electrical coil ben. It ran in one inside the coil core the plunger opening a substantially parallel to the longitudinal axis extending anchor plunger provided. On the anchor plunger is attached at least one magnetic armature, the at least one kerseitenfläche that from the longitudinal axis with a is cut from 90 ° different angles. Still is the coil core in the area of the magnet armature is interrupted guided.

With such a configuration, the Ma moves gnetankers transverse to the longitudinal axis when the electrical Spu le is flowed through by electricity. Because of the special, under broken formation of the coil core in the area of the magnet kers, the magnetic field lines emerge from an er most coil core section, into the magnet armature and how the out and then into a second coil core section. Because of the "oblique" design with respect to the longitudinal axis Anchor side surfaces result in a transverse to the longitudinal axis running force component acting on the magnet armature, which connects the magnet armature and thus the magnet armature which anchor tappets shifted transversely to the longitudinal axis. This cross movement is according to the invention for actuation in particular a valve spool of a hydraulic solenoid valve ver turns.

According to the invention, the magnetic armature can also be two anchors ten surfaces that from the longitudinal axis with one of 90 ° different angles are cut, the two Anchor side surfaces in a preferred embodiment to egg ner plane perpendicular to the longitudinal axis are symmetrical. Especially with this training  of the two anchor side surfaces rise due to the ma generated genetic flow, ver in the direction of the longitudinal axis running components of those acting on the magnet armature Force so that kei in the longitudinal direction of the anchor plunger ne additional burden results. This will make the operating increased safety of the pole according to the invention. Farther acts against a single diagonally arranged anchor line a lateral force component doubled in amount on the magnet armature. This will increase the efficiency of the Poles according to the invention improved.

According to the invention, the coil core can have at least one or also have two core side surfaces that extend from the longitudinal axis be cut at an angle other than 90 °, the two core side surfaces being one with respect to the The longitudinal axis of the perpendicular plane is symmetrical can be det. With such a design of the coil core there is an improved guidance of the magnetic field nien inside the pole according to the invention, whereby its Efficiency is increased. It is particularly advantageous clinging if an anchor side surface is essentially parallel runs to an opposite core side surface, because then the course of the magnetic field lines in the invent pole according to the invention can be designed particularly well. Dar moreover, the behavior of one can be designed in this way Model and predict ten pols particularly well, so that in particular also linear actuation processes and precise re successfully made possible.

In the above-described embodiments of the inventions Poles according to the invention is in view of the location of anchorage surfaces and core side surfaces with the designation "im we considerably parallel "meant that one core side surface in each at least one actuation state of the armature in parallel runs to an anchor side surface. It is not over concluded that one anchor side surface at a publisher tion of the magnet armature a position to a core side surface  in which it no longer remains parallel to each other fen. Especially in the case of large relocations, only one side Stored anchor lifters can cause such conditions.

Furthermore, in the interrupted area of the coil core a connection area made of antimagnetic material hen, the sections of the coil core connect to each other det. This results in a compact and stable construction of the coil core, which also prevents the leakage of Hydraulic fluid is sealed.

In the interrupted area of the coil core can also Connection area may be provided, the magnetizable Ma material. This can ge an additional air gap will create that before the actual switching of the Magne through an electrical coil in the area of the magnet armature by an electrical coil in the area of the magnet armature in Saturation can be brought. This results in an additional one Actuation of the anchor in the course of its direction of movement tion that before the actual switching of the invention appropriate magnetic armature is present. In such a state the magnetic armature according to the invention is in an initial position tion from which he increased by increasing the current in his Switch position can be brought. The goes through force no longer increases the additional air gap, because it is preferably saturated. However takes the through a working air gap between the pole and force generated by the magnet armature with the increase in magneti field density in the area of the pole. As soon as the force in Working air gap is larger than the force in the additional Air gap the magnet armature moves in the direction of the Working air gap created force. The in addition Air gap generated force increases with a very steep characteristic never decrease because the associated air gap increases and because at the same time the working air gap is reduced. in the The result is the force generated in the working air gap Switch a Ma provided with the pole according to the invention  immediately and in full. Furthermore There are hardly any eddy current delays when the The main part of the magnetic field in the working air gap is caused by egg a bias current has been established.

The further development according to the invention results in a number rich benefits. So need to switch the invention Magnets can only be caused by small increases in current. Doing it there are hardly any eddy current delays when switching, whereby a high shortly after the start of the magnet armature Switching force is available. In connection with the particular the advantages of a swivel anchor magnet resulting in this way ten, namely a low anchor mass, a negligible Ren friction of the armature inside the pole as well as under Aus switching a mass increase through oil to be displaced the anchor according to the invention can be through narrow bores use particularly advantageous.

The pole according to the invention can be easily manufactured if the coil core and / or the magnet armature each as in the we substantial cylindrical pipe section are shown. Here the magnet armature is preferably designed so that it is on a rod-shaped anchor plunger is securely attachable while the coil core has a through opening, which so out is that the anchor tappet even with large displacements of the magnet armature not on the inside of the coil core lies.

If a first end of the anchor plunger with a first end of the coil core is firmly connected, then the Ma moves gnetanker when moving on a circular path around the Attachment point of the armature plunger on the coil core. One with you resulting transverse movement of the magnet armature can then be special simply for example on a valve slide of a hydrau solenoid valve are transmitted. It continues provided that a second end of the anchor plunger over a protrudes the second end of the coil core. For actuation at  for example a valve spool, it is then sufficient for the coils core in a valve body and attach the second end of the armature tappet in contact with the valve slide gene.

The invention is also in a magnet especially for realized a hydraulic solenoid valve that one like Pole designed according to the invention described above having, at least in the region of the coil core an electrical coil is provided.

The invention is also implemented in a magnet which two electrical, preferably arranged coaxially to each other Has coils. It is particularly advantageous if a Magnetic pole is used, in which in the interrupted Area of the coil core a connection area with magneti sable material is provided. With two such coils can be magnetized in a particularly simple manner achieve improved operation with a second Air gap allows.

Deviating from this or in addition, the electrical coil or the electrical coils can not only with two under different operating voltages can be applied, but also with three different operating voltages be beatable. Starting from a resting potential, that represents the first operating voltage, via the second loading drive voltage switched to the third operating voltage the. The second operating voltage creates the pre-magnet tization, while the third operating voltage the actual Chen represents switching current of the magnet.

According to the invention, the magnetization of the magnet can kers can also be achieved by a permanent magnet.

In addition, the invention also relates to a hydraulic Ma magnetic valve with at least one magnet according to the invention,  the solenoid valve being actuated by the armature plunger Ren valve slide.

The swivel arm according to the invention described above magnet is particularly advantageous because it works with little friction and therefore little or no wear points. In addition, it has a high sensitivity ity, as there is no static friction to operate that must be. Especially when training with two at an angle running, symmetrical working columns results the particular advantage that no resulting force in Axis direction of the anchor plunger to be bent occurs. Au In addition, the magnet armature can be made particularly small, whereby the controllability of the Ma gnets improved. Furthermore, the magnet according to the invention no reduced oil mass, so that regardless of no essential whether there is oil or air in the anchor space chen dynamic differences. After all, he is invented Magnet designed according to the invention is particularly simple.

The invention is also implemented in a pole that one Has magnet armature, in which the armature side surfaces Cut the longitudinal axis at a right angle if at the same time the coil core in the area of the magnet armature at least one Has core side surface, which extends from the longitudinal axis with a is cut from 90 ° different angles. Even with one those compared to the embodiments described above In the opposite direction, the field lines run in Air gap between magnet armature and coil core so that a Force component perpendicular to the longitudinal axis ent stands, which deflects the magnet armature.

The invention is in the drawing based on an embodiment exemplified.

Fig. 1 shows a cross section through an inventive SEN Pol,

FIG. 2 shows an enlarged detail of the representation of the pole from FIG. 1,

Fig. 3 shows an inventive hydraulic propor tional-way valve,

Fig. 4 shows a cross section through a further OF INVENTION pole to the invention,

Fig. 5 shows an enlarged detail of the view of the pole of Fig. 4,

Fig. 6 shows a circuit diagram for the operation of the pole of Fig. 4,

Fig. 7 shows a further circuit diagram for the operation of the pole of Fig. 4,

Fig. 8 shows a circuit diagram for the operation of a wide ren pole according to the invention,

Fig. 9 shows a schematic representation of another pole according to the invention and

FIG. 10 shows a circuit diagram for the operation of the pole from FIG. 9.

Fig. 1 shows a cross section through a pole 1. The pole 1 has a core 2 with an essentially cylindrical outer shape, on the outside of which an electrical coil 3 is provided.

The coil 3 has a substantially cup-shaped housing Spulenge 4 , which is provided on its right side in Fig. 1 bottom side with a core opening 5 , which closes with the outside of the core 2 . On the side opposite the core opening 5 , the coil 3 is closed with a ring washer 6 , which closes with its inner circumference with the core 2 and with its outer circumference with the coil housing 4 . In the space formed by the outside of the core 2 and by the inside of the coil housing 4 and by the washer 6 , a coil winding 7 is inserted, which can be supplied with electrical energy via two connections (not shown in this view).

The core 2 is divided into a first core section 8 , which is located on the left-hand side in FIG. 1, and a second core section 9 , which is located on the right-hand side in FIG. 1. The first core section 8 and the second core section 9 are made of magnetizable material and they have a common longitudinal axis 10 GE.

The first core section 8 has a first end face 11 located on the left in FIG. 1, which results as a sectional plane of a plane running perpendicular to the longitudinal axis 10 with the first core section 8 . At the end 11 opposite the first end face, the first core section 8 has a first core side surface 12 which results as a sectional plane of a plane extending obliquely to the longitudinal axis 10 with the first core section 8 . The first core section 8 is provided on its on the outside Man tel with a first pressure pipe heel 13 , on which a pressure pipe 14 made of antimagnetic material is attached.

The first core section 8 is further provided in the region of the first end face 11 with a tappet receiving bore 15 which runs in the region of the longitudinal axis 10 . The tappet receiving bore 15 widens in the direction of the first core side surface 12 to a first tappet bore section 16 . Here, an essentially rod-shaped anchor plunger 17 is inserted into the plunger receiving bore 15 and BEFE Stigt there.

The second core section 9 has at its end on the right in FIG. 1 a second end face 18 , which results as a sectional plane of a plane perpendicular to the longitudinal axis 10 with the second core section 9 . At the end of the second core portion 9 opposite the second end face 18 , a second core side face 19 is formed, which is the intersection of a plane extending obliquely to the longitudinal axis 10 with the second core portion 9 . The second core side surface 19 and the he core side surface 12 are arranged symmetrically with respect to one another with respect to a plane of symmetry 20 running perpendicular to the longitudinal axis 10 .

In the interior of the second core section 9 , a second tappet bore section 26 is also formed along the longitudinal axis 10 , the diameter of which corresponds to that of the first tappet bore section 16 . The kerstößel 17 passes through the second tappet bore section 26 and emerges from the second end face 18 . On the section of the armature plunger 17 emerging from the second core section 9, the plunger 17 is thickened to form an actuating ball section 27 .

On its outside, the second core section 9 is provided with a circumferential second pressure pipe shoulder 21 on which the pressure pipe 14 is arranged. Thereby, the second core portion 9 via the pressure pipe 14 cut 8 connected to the first Kernab, wherein by the first core side surface 12, through the second core side surface 19 and the inner 22 is formed 14 side of the pressure tube, an armature space, which in cross-section substantially has the shape of a trapezoid.

A magnet armature 23 , which is made of magnetizable material, is arranged in the armature space 22 . The magnet armature 23 has essentially the shape of a cylinder, the symmetry axis of tri parallel to the longitudinal axis 10 . The two end faces of the magnet armature 23 extend obliquely to the longitudinal axis 10 , wherein one end face is designed as a first armature side surface 24 , which runs essentially parallel to the he core side surface 12 . The other end face of the magnet armature 23 is formed as a second armature side surface 25 , the surface 19 extends substantially parallel to the second core sides. Along the longitudinal axis 10 , the magne tanker 23 is provided with a magnet armature bore 26 through which the armature tappet 17 runs. The magnet armature 23 is fixedly attached to the armature plunger 17 and so angeord net in the armature space 22 that an air gap is formed on all sides between the outer surface and the inner surface of the armature space 22 when the armature 23 is at rest.

Due to the arrangement of the armature 23 on the fastened in the first core portion 8 armature plunger 17, the actuation ball portion displaced 27 of the armature plunger is in a loading of the armature 23 1 movement in the armature chamber 22 in a BEWE supply direction, the Fig. By two motion arrows 28 at interpreted 17.

To illustrate the function of the pole 1 , an enlarged section of the illustration from FIG. 1 is used in FIG. 2, the enlarged section in FIG. 2 being limited by an outline 29 also shown in FIG. 1. Furthermore, for illustration a magnetic field line 30 shown in FIG. 1 is used as an example, which illustrates the magnetic flux through the pole 1 when the coil winding 7 is supplied with electrical energy. As can be seen in FIG. 2, the magnetic field line 30 has a first field line section 31 which runs within the first core section 8 , essentially parallel to the longitudinal axis 10 . Furthermore, the field line 30 has a second field line section 32 , which runs inside the magnet armature 23 , specifically if essentially parallel to the longitudinal axis 10 . Finally, the magnetic field line 30 has a third field line section 33 which runs essentially parallel to the longitudinal axis 10 within the second core section 9 .

In the air gaps between the magnet armature 23 and the first core side surface 12 or the second core side surface 19 , the field line 30 has a first transition field line section 34 or a second transition field line section 35 . The first transition field line section 34 extends perpendicular to the first core side surface 12 and to the first anchor side surface 24 , while the second transition field line section 35 extends perpendicular to the core side surface 19 and to the second anchor side surface 25 .

By magnetic flux through the core 2 act in the air gap between the first core section 8 and the Magne tanker 23 forces F _SL , which run parallel to the first transition field line section 34 . In addition, forces F _SR , which run parallel to the second transition field line section 35 , act between the magnet armature 23 and the second core side surface. These forces F _SL and F _SR can be broken down into components that run parallel to the longitudinal axis 10 or perpendicular to the longitudinal axis 10 . This results in a left triangle of forces 36 and a right triangle of forces 37 , which are shown by way of example together with a coordinate system 38 in FIG. 2. The two forces F _SL and F _SR are identical in terms of amount. However, they differ in their respective directions. As can be seen in FIG. 2, their two components -F _x and F _x running in the x direction cancel each other out, so that no force is applied to the magnet armature 23 in the x direction. The two remaining components -F _{y of} the two forces F _SL and F _SR add up to a total force -2F _y , which shifts the magnet armature 23 in a direction opposite to the y direction.

As can be seen particularly well in FIG. 2, there is a connection between the angle between the first core side surface 12 , the second core side surface 19 , the first anchor side surface 24 or the second anchor side surface 25 and the longitudinal axis 10 , and the Amounts of the force components of the two forces F _SL and F _SR acting in the direction of the y axis. By varying the above-mentioned angles and the size of the air gap in the armature space 22, it is possible to react to different requirements with regard to the required deflection of the actuating ball section 27 on the armature tappet 17 . The smaller the angle of intersection between the longitudinal axis 10 and the first core side surface 12 , the second core side surface 19 , the first armature side surface 24 and the second armature side surface 25 , the greater the proportion of the respective force components in the direction of the y axis.

Fig. 3 shows a solenoid valve 50 according to the invention in cross section.

The solenoid valve 50 has a valve housing 51 , in which a valve piston bore 52 with a Ven tilkolben 53 inserted therein is provided. Of the valve piston bore 52 leading hydraulic channels 54 häuses to the outside of the Ventilge 51st

In the area of one end of the valve piston 53 , a pole bore 55 is formed, which extends substantially perpendicular to the valve piston bore 52 . In the exit region of the pole holes 55 , these are expanded to pole receiving openings 56 , in each of which a pole 1 from FIG. 1 are inserted. Here, the second core portion 9 is respectively inserted so far into the receiving opening Polauf until the underside of the Spulenge häuses 4 at the valve housing 4 is applied. In this state, the actuating ball portions 27 of the armature tappets 17 touch the ends of the valve piston 53 . A retaining ring 57 placed on each of the first core section 8 secures the coil 3 on the core 2 against sliding down.

In operation, the solenoid valve 50 behaves as follows. If the valve piston 53 is shifted to the left in the illustration shown in FIG. 3, then the coil 7 of the pole 1 on the right in FIG. 3 is supplied with electrical energy. Thereupon the gastric tank 23 of the pole 1 on the right in FIG. 3 moves to the left and thereby displaces the plunger 17 and the actuating ball section 27 to the left. The actuating ball section 27 of the pole 1 on the left in FIG. 3 is also shifted to the left until, due to the bending of the armature tappet 17, it exerts an opposing force on the valve piston 53 which is so large that there is a balance of forces. If this is desired, for example in the course of a regulation, the pole 1 on the left in FIG. 3 can also be actuated at the same time by supplying its coil winding 7 with electrical energy.

After the interruption of the supply of electrical energy to the coil windings 7 , the armature plunger 17 and the Ven tilkolben 53 return to the starting position shown in FIG. 3 again.

FIG. 4 shows a further pole 60 according to the invention, which essentially corresponds to the pole 1 according to the invention from FIG. 1. The same parts are therefore provided with the same reference numerals.

The pole 60 has a pressure tube 61 which is essentially in the form of a hollow cylinder. The pressure pipe 61 is divided into a first pressure pipe section 62 made of magnetizable material, a second pressure pipe section 63 made of antimagnetic material and a third pressure pipe section 64 made of magnetizable material.

The first pressure pipe section 62 and the third Druckrohrab section 64 are so long that the wider side of the armature 23 is just under the first pressure pipe section 62 and under the third pressure pipe section 64 .

In addition to the field line 30, a partial field line 65 is drawn in FIG. 4, which extends from the first core section 8 into the first pressure pipe section 62 and from there enters the outer surface of the magnet armature 23 . Inside the magnet armature 23 , the partial field line 65 runs parallel to the second field line section 32 past the second pressure pipe section 63 until it emerges from the magnet armature 23 in the region of the third pressure pipe section 64 . There, the partial field line 65 enters the third pressure pipe section 64 , from where it runs into the second core section 9 and closes the magnetic circuit again via the coil housing 4 and the annular disk 6 . The course of the partial field line 65 is illustrated in more detail in FIG. 5.

FIG. 6 shows an electrical circuit 66 for operating the pole 60 from FIG. 4. Of the pole 60 , only the coil 3 is shown in FIG. 6. The coil 3 can be supplied with a voltage Ub via a first switch 67 . In the circuit closed by the first switch 67 ei ne diode 68 is also arranged.

The electrical circuit 66 also has a second switch 68 , via which the terminals of the coil 3 can be acted upon by a second operating voltage Ua. The second operating voltage Ua is greater than the first operating voltage Ub.

In operation, the magnetic pole 60 connected according to FIG. 6 behaves as follows. In a state before switching, the first switch 67 is in the closed state. In this state, there is saturation in the area of the air gaps between the first pressure pipe section 62 and the magnet armature 23 or between the third pressure pipe section 64 and the magnet armature 23 . To switch the pole 60 , the second switch 69 is actuated so that the coil 3 is also supplied by the operating voltage Ua. In this state, the force generated in the working gap between the first core section 8 , the magnet armature 23 and the second core section 9 is so great that the magnet armature 23 is pulled downward in the view shown in FIG. 4. As a result, the air gap between the armature 23 and the most pressure pipe section 62 or the second pressure pipe section 63 increases , so that the greater part of the flow of the magnetic field shifts into the part of the working air gap. As a result of a quick switching operation of the pole 60 according to the Invention.

Fig. 7 shows another schematic circuit diagram for loading drive of the pole 60 according to the invention. According to FIG. 7, a single voltage source Ub is sufficient for this, the coil 3 being able to be acted upon by a voltage reduced by the series resistor 70 via the first switch 67 and a series resistor 70 . In parallel with the resistor 70, the second switch 69 is connected, the second switch 69 the resistor 70 bridges upon actuation. This ensures that, depending on the position of the first switch 67 and the second switch 69 , a total of three different operating voltages can be applied to the coil 3 .

Fig. 8 shows a circuit diagram for operating a pole, not shown in this view, which has a first coil 71 and a second coil 72 . In this case, the first coil 71 serves to premagnetize the pole according to the invention, while the second coil 72 is used to switch the pole through. The first coil 71 is supplied with the operating voltage Ub via the first switch 67 . The second coil 72 is opened with the second switch 69 with the operating voltage Ub.

FIGS. 9 and Fig. 10 show a further pole 73 according to the invention, is seen from the in this view only one magnet armature 74, a pressure tube 75, a coil housing 76, a coil 77 and is arranged in the region of the coil 77 permanent magnet 78th

In operation of the pole 73 , the magnetization of the magnetic tanker 74 is effected by the permanent magnet 78 . To actuate the pole 73 , the coil 77 can be supplied with a first operating voltage Ua and with a second operating voltage Ub, which can be seen particularly well in FIG. 9. The voltages Ua and Ub each have an inverted polarity, so that the coil 77 th through switch 79 for switching on or for switching off the permanent magnet 78 can be reversed.

Reference list

1

pole

2nd

core

3rd

Kitchen sink

4th

Bobbin case

5

Core opening

6

Washer

7

Coil winding

8th

First core section

9

Second core section

10th

Longitudinal axis

11

First face

12th

First core side surface

13

First pressure pipe heel

14

Pressure pipe

15

Tappet mounting hole

16

First tappet bore section

17th

Anchor lifter

18th

Second face

19th

Second core side surface

20th

Plane of symmetry

21

Second pressure pipe heel

22

Anchor room

23

Magnetic anchor

24th

First anchor side surface

25th

Second anchor side surface

26

Second tappet bore section

27

Section actuating ball

28

Movement arrow

29

Outline

30th

Field line

31

First field line section

32

Second Feldlinienab section

33

Third Feldlinienab section

34

First transition field line section

35

Second transition field line section

36

Left triangle of forces

37

Right triangle of forces

38

Coordinate system

50

magnetic valve

51

Valve body

52

Valve piston bore

53

Valve piston

54

Hydraulic channel

55

Pole hole

56

Pole opening

57

Retaining ring

60

pole

61

Pressure pipe

62

first pressure pipe section

63

second Druckrohrab cut

64

third pressure pipe section

65

Subfield line

66

electrical circuit

67

first switch

68

diode

69

second switch

70

Series resistor

71

first coil

72

second coil

73

pole

74

Magnetic anchor

75

Pressure pipe

76

Bobbin case

77

Kitchen sink

78

Permanent magnet

79

switch

Claims (19)

1. Pole ( 1 ) for a magnet, in particular for use in a hydraulic solenoid valve ( 50 ), with a coil core ( 8 , 9 ) made of magnetizable material and extending along a longitudinal axis ( 10 ), the pole ( 1 ) continuing has the following characteristics:

• - In an inside of the coil core ( 8 , 9 ) the plunger opening ( 16 ) is an essentially parallel to the longitudinal axis ( 10 ) extending armature plunger ( 17 ) is provided,
• - On the armature plunger ( 17 ) at least one Magnetan ker ( 23 ) is provided which has at least one armature side surface ( 19 , 24 ) which is cut from the longitudinal axis ( 10 ) at an angle different from 90 °,
• - The coil core ( 8 , 9 ) is interrupted in the area of the armature ( 23 ).

2. Pole according to claim 1, characterized in that the magnet armature has two armature side surfaces ( 24 , 25 ) which are cut from the longitudinal axis ( 10 ) with a different angle of 90 ° ver. 3. Pole according to claim 2, characterized in that the two armature side surfaces ( 24 , 25 ) to a with respect to the longitudinal axis ( 10 ) perpendicular plane ( 20 ) are formed symmetrically. 4. Pole according to one of the preceding claims, characterized in that the coil core ( 8 , 9 ) has at least one core side surface ( 12 , 19 ) which is cut from the longitudinal axis ( 10 ) at an angle different from 90 °. 5. Pole according to one of the preceding claims, characterized in that the coil core ( 8 , 9 ) has two core side surfaces ( 12 , 19 ) which are cut from the longitudinal axis ( 10 ) at an angle different from 90 °. 6. Pole according to claim 5, characterized in that the two core side surfaces ( 12 , 19 ) to a with respect to the longitudinal axis ( 10 ) perpendicular to the plane ( 20 ) are formed symmetrically. 7. Pole according to one of claims 1 to 3 and according to one of claims 4 to 6, characterized in that one armature side surface ( 24 , 25 ) extends substantially parallel to one core side surface ( 12 , 19 ). 8. Pole according to one of the preceding claims, characterized in that in the interrupted area of the coil core ( 8 , 9 ) a connection area ( 14 ) is provided which has antimagnetic material. 9. Pole according to one of the preceding claims, characterized in that in the interrupted area of the coil core ( 8 , 9 ) a connection area is provided which has magnetizable material ( 62 , 64 ). 10. Pole according to claim 8 and / or according to claim 9, characterized in that the connecting region ( 14 ) has a tubular shape and connects interrupted sections of the coil core with each other. 11. Pole according to one of the preceding claims, characterized in that the coil core ( 8 , 9 ) is designed as a substantially cylindrical tube section. 12. Pole according to one of the preceding claims, characterized in that the magnet armature ( 23 ) is designed as a substantially cylindrical shear pipe section. 13. Pole according to one of the preceding claims, characterized in that a first end of the armature plunger ( 17 ) with a first end ( 11 ) of the coil core ( 8 , 9 ) is fixedly connected. 14. Pole according to one of the preceding claims, characterized in that a second end of the armature plunger ( 17 ) projects beyond a second end ( 18 ) of the coil core ( 8 , 9 ). 15. Magnet, in particular for a hydraulic solenoid valve, with a pole ( 1 ) according to one of the preceding claims, wherein furthermore, at least one electrical coil ( 3 ) is provided in the region of the coil core ( 8 , 9 ). 16. Magnet according to claim 15, characterized in that two electri arranged in particular coaxially to each other cal coils are provided. 17. Magnet according to claim 15 or according to claim 16, characterized in that the electrical coil ( 3 ) or the electrical coils can be acted upon with at least three different operating voltages. 18. Magnet according to one of claims 15 to 17, characterized in that in the region of the coil core, a permanent magnet ( 78 ) is angeord net. 19. Hydraulic solenoid valve ( 50 ) with at least one magnet according to one of claims 15 to 18, wherein the magnetic valve ( 50 ) has a valve slide ( 53 ) which can be actuated by the armature tappet ( 17 ).