Electromagnetic device and method for manufacturing such an electromagnetic device

Abstract

The electromagnetic device comprises a magnet core with a longitudinal axis having a first region and a second region, a coil former arranged around the second region of the magnet core, the coil former having at least one receiving region for receiving at least one coil winding of a coil, and a housing made of magnetic material, the housing circumferentially surrounding the magnet core and the coil former, the housing having at least one contact region surrounding and contacting the magnet core. The first region of the magnet core has at least one convex portion on a surface of the magnet core facing the contact region of the housing, the convex portion being formed such that the magnet core does not contact the housing in a section along the longitudinal axis between the convex portion and the second region of the housing.

Description

Technical Field

[0001] The present invention relates to an electromagnetic device having a magnetic core, a coil bobbin circumferentially disposed around the magnetic core, and a housing, and a method for manufacturing such an electromagnetic device.

[0002] Such electromagnetic devices are used, for example, in electromagnetic actuators, which are known, for example, in the form of electromagnetic switching devices or valve devices, such as in the form of electromagnetic relays or solenoid valves. For example, a solenoid valve in the form of a tilting armature valve is used, for example, in a vehicle, such as in a commercial vehicle or a bus for passenger transportation, as a control valve for adjusting air pressure. For example, a braking system for a vehicle equipped with an electronic service braking system includes at least one control valve for pressure adjustment.

[0003] An electromagnetic actuator in the form of a tilting armature valve having an electromagnetic device is known, for example, from German Patent Application Publication No. 102016105532. The electromagnetic actuator has an electromagnetic device, which includes a magnetic core and a coil bobbin arranged to surround the magnetic core.

[0004] Furthermore, other structural styles of solenoid valves, such as those described in German Patent Application Publication No. 102014115207, German Patent Application Publication No. 102018123997, or German Patent Invention No. 102014115206, are known.

[0005] In general, in electromagnetic devices, the magnet core is press-fitted or welded into the housing to form a bond between the magnet core and the housing. This method can achieve the lowest possible magnetic resistance by avoiding gaps at the transition from the magnet core to the housing or yoke. The spacing and position of the magnet core relative to the housing generally have a significant impact on the resulting magnetic force.

[0006] In conventional manufacturing methods, the magnet core, coil bobbin, and housing generally need to be manufactured with high precision to achieve center alignment of the coil and magnet core relative to the housing, thereby avoiding tilting of the magnet core relative to the housing. Such tilting causes increased electromagnetic loss, which reduces efficiency and increases variability in functional parameters during manufacturing. Because high manufacturing precision is required, conventionally manufactured electromagnetic devices often have increased electromagnetic loss, which reduces the efficiency of such devices. Furthermore, known manufacturing variations are complex and time-consuming because they require extremely precise machining of individual components of electromagnetic devices.

[0007] Therefore, the fundamental problem of the present invention is to improve upon the electromagnetic devices of the type described at the beginning, to provide an electromagnetic device that can be manufactured relatively easily and at a relatively low level with manufacturing tolerance, and that provides sufficiently constant magnetic characteristic values ​​when observed across multiple devices to be manufactured.

[0008] The present invention relates to an electromagnetic device of the type described at the beginning, as described in the appended claims. Advantageous embodiments and variations of the present invention are shown in the dependent claims and the following description.

[0009] In particular, one aspect of the present invention relates to an electromagnetic device, which includes a magnet core having a longitudinal axis having a first region and a second region, a coil winding frame disposed around the second region of the magnet core having at least one housing region for housing at least one coil winding of a coil, and a housing having a magnetic material, which at least partially surrounds the magnet core and the coil winding frame in the circumferential direction, and which has at least one contact region in which the housing surrounds and contacts the magnet core. The first region of the magnet core has at least one convex portion on the surface of the magnet core facing the contact region of the housing. The magnet core contacts the contact region of the housing in the region of the convex portion, and the convex portion is formed so that the magnet core does not contact the housing in the section along the longitudinal axis between the convex portion and the second region of the housing.

[0010] The electromagnetic device of the present invention enables rapid and reliable centering of the magnet core in the housing, because the magnet core can be centered relatively easily by the housing and the coil winding frame. Such centering improves the alignment of these components with respect to each other, thereby reducing electromagnetic losses, particularly compared to known electromagnetic devices manufactured as described above. This also means that the electromagnetic device of the present invention has high efficiency.

[0011] The present invention further enables the easy and less manufacturing tolerance required for electromagnetic devices by allowing the convex portion of the magnet core to be easily centered in the housing. This minimizes the positional tolerance of the magnet core and ensures sufficiently consistent magnetic properties across multiple devices to be manufactured. In other words, this means that the devices of the present invention can achieve consistent magnetic properties even when the manufacturing tolerance is set at a lower level than that for conventional electromagnetic devices. Furthermore, the lower level of manufacturing tolerance makes the manufacturing method for these individual components more economical than that for individual components of conventional electromagnetic devices.

[0012] Furthermore, this configuration of the electromagnetic device allows the magnet core to be inserted into the housing with less force in the longitudinal direction compared to conventional manufacturing methods, and in this case, it is possible to easily provide a gap-free connection between the magnet core and the housing. The convex portion allows a kind of fluidity to be induced in the housing, particularly the housing material, during press-fitting, which reduces the press-fitting force required to press-fit the magnet core into the housing, while simultaneously allowing an angular offset between the longitudinal axis of the housing and the magnet core. This is because the magnet core does not contact the housing in the section along the longitudinal axis between the convex portion and the second region with the coil winding frame around it, and therefore there is a play space for the angular offset between the housing and the magnet core.

[0013] The apparatus of the present invention basically comprises a magnet core and a magnet housing and is applicable to many types of electromagnetic devices in which precise alignment of the magnet core is important.

[0014] The electromagnetic devices of the present invention can be used not only with electromagnetic actuators, such as solenoid valves and electromagnets, but also with electric relays. Preferably, the electromagnetic devices of the present invention are used, for example, in solenoid valves, preferably tilting armature valves, provided in the brake systems of vehicles, particularly commercial vehicles.

[0015] According to one embodiment of an electromagnetic device, the housing is in contact with the coil reel and applies a force to the coil reel lateral to the longitudinal axis of the magnet core. The contact between the coil reel and the housing is advantageously designed so that the magnet core, which is positioned within the coil reel, is centered within the housing. This allows for easy and rapid centering of the magnet core, thereby giving the electromagnetic device consistent magnetic properties.

[0016] According to one embodiment of an electromagnetic device, the housing area is formed by at least one wall, which has a first region extending in the direction of the longitudinal axis of the magnet core and at least one second region extending laterally with respect to the longitudinal axis of the magnet core, and the housing is in contact with the second region of the wall. The contact between the second region and the housing facilitates the centering of the coil winding in the housing, and thereby also enables the centering of the magnet core in the housing. The alignment of the center of the magnet core in the housing enables the manufacture of an electromagnetic device having certain magnetic properties.

[0017] According to one embodiment of an electromagnetic device, the housing has an opening that extends longitudinally along the magnet core, with a longitudinal axis. The opening surrounds the magnet core in the contact area of ​​the housing, and the longitudinal axis of the magnet core is positioned with an angular offset from the longitudinal axis of the opening. The cooperation of the configuration of the opening in the housing and the configuration of the convex portion of the magnet core ensures that no gap is created between the housing and the magnet core. This gap-free configuration results in certain magnetic properties for the electromagnetic device. Furthermore, the convex portion enables a predetermined angular offset between the longitudinal axis of the opening and the longitudinal axis of the magnet core, while simultaneously ensuring gap-free contact between the housing and the magnet core. In other words, this enables an angular offset between the hole axis of the opening, which is the longitudinal axis of the opening, and the longitudinal axis of the magnet core.

[0018] According to one embodiment of an electromagnetic device, the convex portion is spherically formed on the surface of the magnet core facing the contact area of ​​the housing. The convex portion, in particular a spherical convex portion, advantageously creates a spherical press-fit zone, which can be press-fitted into the housing. The spherical convex portion makes it possible to induce a kind of fluidity in the housing, particularly the housing material, when the magnet core is press-fitted into the housing, thereby reducing the required press-fitting force. Furthermore, it becomes possible to angularly offset the longitudinal axis (hole axis) of the housing opening or housing hole in the contact area of ​​the housing with respect to the longitudinal axis of the magnet core, thereby achieving the best possible centering of the magnet core in the housing during the manufacturing process. The spherical configuration is an advantageous embodiment of the convex portion in this regard because it allows for angular offset and compensation in three dimensions.

[0019] The housing of an electromagnetic device has magnetic material. The housing may primarily consist of magnetic material. The housing may be formed entirely from magnetic material.

[0020] According to one embodiment of the electromagnetic device, the magnet core is formed rotationally symmetrically in a first region and a second region. This enables the rapid and repeatable manufacturing of the magnet core.

[0021] According to one embodiment of the electromagnetic device, the convex portion has a maximum outer diameter larger than the outer diameter of the magnet core in the second region. In this region with the maximum diameter, the magnet core is in direct or gapless contact with the housing, and the corresponding pivoting motion of the convex portion allows the magnet core to be centered within the housing, even with relatively large manufacturing tolerances. In this case, gapless contact is not compromised. Furthermore, this configuration allows the magnet core to be quickly and reliably centered within the housing, particularly using a coil winding frame, because the magnet core is pivoted around the convex portion within the housing. No post-processing of the housing or the magnet core is required in this case.

[0022] According to one embodiment of the electromagnetic device, the magnet core is formed cylindrically in a second region. This configuration allows the magnet core to be quickly and easily inserted into the coil bobbin. Naturally, the same applies when the coil bobbin is fitted over the magnet core. To avoid repetition, the insertion of the magnet core into the coil bobbin should be considered equivalent to the fitting of the coil bobbin over the magnet core.

[0023] According to one embodiment of an electromagnetic device, the coil reel material is made of a plastic material. A coil reel having such a coil reel material is advantageous and easy to manufacture. However, the coil reel may also be made entirely of plastic, particularly thermoplastic plastic.

[0024] According to one embodiment of the electromagnetic device, the electromagnetic device is formed as an electromagnetic actuator. This is an advantageous application of the electromagnetic device of the present invention.

[0025] According to one embodiment of the electromagnetic device, the electromagnetic device formed as an electromagnetic actuator has a movable magnetic armature body as a movable actuator element that is movable by a magnetic field generated by a current passing through a coil and a magnetic core. This enables reliable switching of the electromagnetic actuator. Further, since the center of the magnetic core can be aligned with the armature body, a defined magnetic field guide between the magnetic core and the armature body and movement of the armature body are possible, whereby the function of the armature body can be satisfactorily fulfilled.

[0026] According to one embodiment of the electromagnetic device formed as an electromagnetic actuator, the armature body is supported by a coil bobbin or a housing.

[0027] According to one embodiment of the electromagnetic device, the electromagnetic device is formed as an electromagnetic switching device or valve device provided with a movable magnetic armature body that is a switching element or valve element movable by a magnetic field generated by a current passing through a coil and a magnetic core.

[0028] According to one embodiment, the electromagnetic device is formed as an electromechanical relay or solenoid valve.

[0029] According to one embodiment, the electromechanical device is formed as a solenoid valve for a vehicle pressure regulating module or an air treatment unit.

[0030] A further aspect of the present invention relates to a method of manufacturing the electromagnetic device of the present invention, the method comprising: · a step of pre-assembling a coil bobbin and a magnetic core to form an assembly; · A step of assembling an assembly consisting of a coil bobbin and a magnetic core into a housing, · When assembling the assembly within the housing, a step of centering the magnetic core in a direction transverse to the longitudinal axis of the magnetic core by a pivoting movement of a first region of the magnetic core with respect to a contact region of the housing, · A step of fixing an assembly consisting of a coil bobbin and a magnetic core within the housing and having.

[0031] The embodiments and advantages cited in connection with the electromagnetic device similarly apply to the method of the present invention. To avoid repetition, these are not reproduced here.

[0032] According to one embodiment of the method, the coil bobbin has a magnetic core accommodation space, and the magnetic core is inserted into this magnetic core accommodation space.

[0033] According to one embodiment of the method, the method may have a method step of aligning the magnetic core with respect to the magnetic core accommodation space within the coil bobbin, whereby the longitudinal axis of the magnetic core and the longitudinal axis of the magnetic core accommodation space are aligned with each other.

[0034] The embodiments described herein may be applied coexistently or in any combination with each other. [[ID=……]]

[0035] Hereinafter, the present invention will be described in more detail based on the drawings shown in the drawings.

Brief Description of the Drawings

[0036] [Figure 1A] FIG. 2 is a schematic cross-sectional view of an exemplary tilting armature valve to which the electromagnetic device of the present invention as shown can be applied according to the principle. [Figure 1B]Figure 2 shows a schematic cross-sectional view of an exemplary tilting armature valve to which the electromagnetic device of the present invention can be applied according to the principle. [Figure 2] Figure 1 shows a schematic cross-sectional view of one embodiment of the electromagnetic device of the present invention, which can be used in a tilting armature valve, for example.

[0037] Figure 1 shows a simplified cross-sectional view of a tilting armature valve 100 to which an electromagnetic device of the present invention, as shown in the embodiment of Figure 2, can be applied according to the principle, based on Figures 1A and 1B. Here, Figure 1 illustrates an exemplary practical use of an electromagnetic device based on a tilting armature valve. The configuration of the magnet core and coil reel of the present invention in the housing is shown in detail according to the embodiment in Figure 2 and can be readily adapted by those skilled in the art to the tilting armature valve of Figure 1 in principle. In this regard, it should be noted that the basic functional forms of electromagnetic devices, such as switching devices or valve devices, having an armature body as a switching or valve element that is movable by a magnetic field, are known to those skilled in the art.

[0038] The tilting armature valve 100 in Figure 1 may, according to its basic principle, be one embodiment of the tilting armature valve 100 described in German Patent Application Publication No. 102016105532. In one variation, this may be a solenoid valve denoted by reference numeral 100 in Figure 1. However, other embodiments are also possible, for example, in relation to an electric relay or a solenoid valve as described in other documents cited above. The relevant configuration of the solenoid valve described in German Patent Application Publication No. 102016105532, the components of this solenoid valve and the use of this solenoid valve are also part of the disclosure of the present invention by reference.

[0039] Figure 1A shows a cross-sectional view of a tilting armature valve 100 with the armature in a first position. The tilting armature valve 100 includes a coil element 110, an armature body (or simply armature) 115, a spring 120, a seal element 125, and a cover shell 130. Here, the coil element 110 includes at least one magnet core 135, a coil reel 128 circumferentially arranged around the magnet core 135, and a coil 140 having a group of coil windings (not shown in detail) circumferentially arranged around the coil reel 128. The end face of the armature 115 is supported by a bearing 145. The armature 115 is movable between a first position 147 and a second position 149. Here, the armature 115 is configured to move from a first position 147 to a second (attracted) position 149 when the coil 140 is actuated. The armature 115 can be held in the second position 149 when the coil 140 is actuated. A seal element 125 is further positioned on the side of the armature 115 opposite to the coil element 110. In the cover shell 130, a valve seat 150 with an outlet 155 and an inlet 157 for the fluid 158 are formed. Here, when the armature 115 is positioned in the first position 147, the outlet 155 can be fluid-tightly closed by the seal element 125. Here, the seal element 125 can also act as a damper element to prevent the armature 115 from colliding with the valve seat 150. Here, the seal element 125 may be attached to the armature 115 or the support element by vulcanization. Furthermore, when the armature 115 or sealing element 125 contacts the valve seat 150, an angle may be formed by the angled nozzle or the angled sealing element 125 or the curved armature 115. Such nozzles, not explicitly shown in Figure 1A, do not necessarily have to be incorporated within the tilting armature valve 100 and may be provided by an external housing portion.

[0040] Furthermore, it is possible that the valve seat 150 is located within the coil element 110, but this is not explicitly shown in Figure 1A for clarity.

[0041] In this case, the operating unit that transmits the release of the outlet by the armature 115 is advantageous.

[0042] In this embodiment, the armature 115 has at least one partially circular protrusion 160 in the bearing section 162, which preferably engages with a recess 165 or opening located in the section of the housing 170 of the tilting armature valve 100 opposite the protrusion 160. This allows the armature 115 to slide in the recess after the current through the coil 140 is turned on as it moves from a first position 147 to a second position 149, and at the same time be held in a fixed position within the housing 170 or relative to the cover shell 130. Preferably, the recess is trapezoidal, which minimizes the friction caused by the sliding of the protrusion across the surface of the recess 165. The recess 165 may be manufactured from, for example, a plastic material, which may make it very easy and inexpensive to manufacture.

[0043] In this example, the spring 120 is formed as a leaf spring and is positioned in the bearing section on the side of the armature 115 opposite to the coil 140. In this case, the spring 120 is used to press one or more bearing balls, for example, press-fitted into the armature 115, into the (e.g., trapezoidal) opposing shell or recess 165 within the housing 170 of the coil element 110 without play. The armature 115 is fixable by the spring 120 and is therefore held in place by the spring 120. This has the advantage that a constant preload can be applied to the armature 115 and the force applied to the armature 115 by the spring 120 can be introduced to the armature 115 as close as possible to the point of force application located on the axis of rotation.

[0044] Alternatively, the armature 115 may be suspended from the coil element 110. In this case, the spring 120, which is formed as a leaf spring, for example, may be omitted.

[0045] Figure 1B shows a cross-sectional view of the tilting armature valve 100, where the armature 115 is in a second position 149. In this case, the current through the coil 140 is turned on, attracting the armature 115, thereby creating a magnetic field represented by magnetic field lines 180. When the current through the coil 140 is turned off, the armature 115 may return to the first position 147, for example, by gravity or the spring force of the illustrated return spring.

[0046] Figure 2 shows a schematic cross-sectional view of one embodiment of the electromagnetic device of the present invention, which can be used, for example, in the tilting armature valve of Figure 1. In Figures 1 and 2, identical components, components having equivalent functions, or similar components are denoted by the same reference numerals. Armature 115 is not shown in Figure 2 for clarity.

[0047] Unlike the tilting armature valve 100 in Figure 1, the electromagnetic device 105 in Figure 2 has a coil element 110 which includes a convex portion 200, for example, a spherical contour, particularly an annular convex portion, in a first region 138, which is preferably cylindrical, and the magnet core 135 is surrounded in a second region 139 of the magnet core 135 by a coil reel 128, which is preferably formed rotationally symmetrically. The coil reel 128 has a housing region 142 for housing at least one coil winding 141 of a coil 140. The coil winding 141 of the coil 140 is arranged within the housing region 142. The convex portion 200 is preferably molded integrally with the magnet core 135, but may basically be molded separately and attached to the magnet core 135.

[0048] The containment area 142 is formed by a wall 129 having, when viewed in cross-section along the longitudinal axis 137 of the magnet core 135, a first area 131 extending in the direction of the longitudinal axis 137 of the magnet core 135, a second area 132 extending laterally (preferably perpendicularly) with respect to the longitudinal axis 137 of the magnet core 135 and located at the first end of the first area 131, and a third area 133 similarly extending laterally (preferably perpendicularly) with respect to the longitudinal axis 137 of the magnet core 135 and located at the second end of the first area 131. Together, the first area 131, the second area 132, and the third area 133 of the wall 129 form a bucket-shaped, or U-shaped, containment area 142.

[0049] The coil reel 128 has a magnet core housing space 143, which is formed by a first region 131 of the wall 129 of the housing region 142. The magnet core housing space 143 is shaped to accommodate the magnet core 135 so that the magnet core 135 can be press-fitted into the magnet core housing space 143 of the coil reel 128. In particular, the magnet core housing space 143 has a cylindrical shape.

[0050] In embodiments not shown, the housing area 142 of the coil reel 128 may be formed only by a first area 131 and a second area 132 of the wall 129, in which case the housing 170 (which is in particular a magnet housing) is positioned near the second end of the first area 131. In this case, the second end of the first area 131 does not come into contact with the housing 170.

[0051] The housing 170 has a rotationally symmetrical hollow space, which is particularly pot-shaped and includes an inner region 171, and is thus formed so that the coil reel 128 can be mounted inside the housing 170 together with the magnet core 135. In this embodiment, the housing 170 has an opening 172 (for example, in the form of a hole) at the bottom 173 of the housing, into which a first region 138 of the magnet core 135 is press-fitted together with at least a portion of the convex portion 200. The central opening 172 has a longitudinal extension along the magnet core 135 with a longitudinal axis 176. The housing 170 has a contact region 175 in which the housing 170 surrounds the first region 138 of the magnet core 135 and is at least partially in contact with the convex portion 200 of the magnet core 135. Based on and to compensate for manufacturing tolerance, an angular offset may exist between the longitudinal axis 137 of the magnet core 135 and the longitudinal axis 176 of the opening 172. This angular offset is easily and efficiently achieved by the convex portion 200 causing the longitudinal axis 137 of the magnet core 135 to pivot relative to the longitudinal axis 176 of the opening 172. Here, the objective is, according to one aspect of the present invention, to align the center of the magnet core 135 in the area of ​​an armature body 115 (not shown) supported on one side by, for example, a coil reel 128 in the device 105. By centering the magnet core relative to the armature 115 (and thus relative to the coil reel 128 at the location of the wall region 132 of the coil reel), a flawless functional form of the solenoid valve can be guaranteed even under tolerance conditions.

[0052] The housing 170 has an annular side wall 174 which extends substantially away from the housing bottom 173 in the longitudinal direction of the opening 172 and thus defines an inner region 171 in the radial direction. In this case, the inner diameter of the inner region 171 is preferably slightly smaller than the outer diameter of the coil frame 128, and more preferably slightly smaller than the outer diameter of the second region 132 of the wall 129 of the coil frame 128, which has the largest outer diameter of the coil frame 128, so that when the coil frame 128 is inserted into the housing 170, a radial pressure (illustrated by force F) is exerted on the coil frame 128, particularly on the radially outer end of the second region 132 of the wall 129 of the coil frame 128. The outer diameter of the third region 133 of the wall 129 is preferably smaller than the outer diameter of the second region 132 of the wall 129, and therefore the third region 133 does not contact the housing 170 when assembled. The outer diameter of the coil 140 is similarly smaller than the outer diameter of the second region 132 of the wall 129 of the coil frame 128. Based on the radial pressing of the housing 170 against the coil frame 128, and particularly against the second region 132 of the wall 129 of the coil frame 128, the magnet core 135 is centered within the housing 170 via the coil frame 128. In other words, this means that the magnet core 135 is centered not primarily by the opening 172 provided in the housing 170, but rather in the second region 139 of the magnet core 135, preferably by the housing 170 and the coil frame 128, and the coil frame 128 is positioned at a distance from the opening 172 or contact region 175 of the housing 170 in the longitudinal direction of the magnet core 135.

[0053] Such centering, in which the magnet core 135 further contacts the housing 170 without a gap in the contact region 175, is made possible by the convex portion 200, which on the one hand allows the magnet core 135 to pivot relative to the longitudinal axis 176 of the opening 172 of the housing 170, and on the other hand, its own rounded shape extending beyond the magnet core 135 in region 139 continues to ensure gap-free contact with the housing 170. In other words, the convex portion 200 compensates for manufacturing deviations or tolerances of the opening 172 and / or the magnet core 135 and / or the coil reel 128, so that the magnet core 135 can be centered within the housing 170. In this case, there is no gap (which may be unfavorable to magnetic flux) between the magnet core 135 and the contact region 175 of the housing 170 within the opening 172. Preferably, the housing 170 is integrally formed in this case.

[0054] The housing 170 includes magnetic materials known to those skilled in the art, such as iron or other metallic materials, as described, for example, in German Patent Application Publication No. 102016105532.

[0055] According to one embodiment, the convex portion 200 positioned on the magnet core 135 is located on the outer surface of a first region 138 of the magnet core 135, so that, in particular, the annular convex portion 200 contacts the contact region 175 of the housing 170 at the terminal position when the magnet core 135 is inserted. The convex portion 200 makes it possible to induce a kind of fluidity in the housing material of the housing 170 during press-fitting, while the contact region 175 of the housing 170 remains in contact with the convex portion 200.

[0056] In the first region 138 of the magnet core 135, when viewed in the direction of insertion of the magnet core 135 into the housing 170, an insertion region 210, particularly a cylindrical insertion region, is initially provided, which has the same outer diameter d2 as, or a smaller outer diameter than, the second region 139 of the magnet core 135, which is preferably cylindrical. This also means that the outer diameter of the cylindrical insertion region 210 is smaller than the inner diameter d3 of the contact region 175 of the opening 172. This allows for easier assembly of the magnet core 135 in the housing 170 because the magnet core 135 can be inserted into the opening 172 even if there is an offset between the longitudinal axis 137 of the magnet core 135 and the longitudinal axis 176 of the opening 172.

[0057] Viewed in the insertion direction, the convex portion 200 continues into the insertion region 210, and in this embodiment, the convex portion 200 has a spherical contour. In other words, in one embodiment, the convex portion 200 has a spherical cross-sectional shape. The convex portion 200 allows the magnet core 135 to pivot (illustrated by the bidirectional arrows on both sides in Figure 2) around a center point of the convex portion 200, preferably located on the longitudinal axis 137. The convex portion 200 has an outer diameter d1 that is larger than the outer diameter d2 of the second region 139 of the magnet core. The outer diameter d1 preferably forms the maximum outer diameter of the magnet core 135.

[0058] A section 136 extends from the convex portion 200 along the longitudinal axis 137 of the magnet core 135, and this section 136 is located between the convex portion 200 and a second region 139 of the magnet core 135 surrounded by the coil reel 128. In this section 136, the magnet core 135 is not in contact with either the housing 170 or the coil reel 128 (as shown in Figure 2, when the longitudinal axis 137 is aligned with the longitudinal axis 176). In other words, there is a free space between the magnet core 135 and the housing 170, in which the magnet core 135 can be positioned (e.g., rotatable) to compensate for manufacturing tolerances, thereby achieving center alignment in the second region 139 (particularly at the position of the wall region 132 near the armature support). This is the case, for example, when the longitudinal axis 137 of the magnet core 135 forms an angular offset with respect to the longitudinal axis 176 of the opening 172 for this centering. This ensures that the armature 115 (see Figure 1, not shown in Figure 2), which is supported below the coil reel 128 (in region 132) or another element of the device 105, is always centered and aligned with respect to the magnet core 135, even under varying manufacturing tolerances, thereby ensuring the functional form of the tilting armature valve 100 under tolerance conditions.

[0059] In other words, this section 136, which cooperates with the convex portion 200, allows the magnet core 135 to pivot when positioned within the opening 172 and, consequently, within the contact area 175. Since the outer diameter d4 of section 136 is smaller than the outer diameter d1 of the convex portion 200, the magnet core 135 does not contact the housing 170 in section 136. The outer diameter d4 may be less than or equal to the outer diameter d2 of the second area 139 of the magnet core 135.

[0060] Section 136 is followed by a second region 139 of the magnet core 135, and the coil winding frame 128 can be fitted over this second region 139.

[0061] In other words, the electromagnetic device 105 of the present invention is provided with a convex portion 200 in the magnet core 135, preferably formed to create a spherical press-fit zone. Next, this transitions to a second region 139 of the magnet core 135, which has a reduced diameter compared to the convex portion 200, corresponding to the maximum possible inclination (depending on the manufacturing tolerance) of the longitudinal axis 137 of the magnet core 135. The convex portion 200, particularly its spherical shape, induces a kind of flow properties in the housing material during press-fitting (comparable to the press-fitting of a sphere to close a hole), which reduces the press-fitting force and simultaneously allows for an angular offset of the longitudinal axis 176 of the opening 172 with respect to the longitudinal axis 137 of the magnet core 135. Thus, the coil reel 128 can be adequately guided by the pressing force F of the housing 170, thereby allowing the magnet core 135 to be positioned within the housing 170 without damage. [Explanation of Symbols]

[0062] 100 Tilting Armature Valve 105 Electromagnetic devices 110 coil elements 115 Armature Body 120 springs 125 seal elements 128 coil winding frame 129 Wall 130 Cover Shell 131 The first area 132 Second Domain 133 The Third Domain 135 Magnet Core 136 sections 137 Longitudinal axis 138 The First Domain 139 Second Domain 140 coils 141 Coil winding 142 Containment Area 143 Magnet core housing space 145 Bearing 147 First Position 149 Second position 150 valve seats 155 Exit 157 Entrance 158 Fluid 160 Ridge 162 Bearing section 165 recess 170 Housing 171 Inner area 172 Aperture 173 Housing bottom 174 Side wall 175 Contact area 176 Longitudinal axis 180 lines of force 200 Convex part 210 Insertion area d1~d4 Diameter F force

Claims

1. An electromagnetic device (105), The electromagnetic device (105) is A magnet core (135) having a longitudinal axis (137) and having a first region (138) and a second region (139), A coil winding frame (128) is positioned around the second region (139) of the magnet core (135), having at least one housing region (142) for housing at least one coil winding (141) of the coil (140), A housing (170) having a magnetic material, wherein the housing (170) surrounds the magnet core (135) and the coil winding frame (128) at least partially in the circumferential direction, and the housing (170) has at least one contact area (175) that surrounds the magnet core (135) and contacts the magnet core (135). It has, The first region (138) of the magnet core (135) has at least one convex portion (200) on the surface of the magnet core (135) facing the contact region (175) of the housing (170), and the magnet core (135) contacts the contact region (175) of the housing (170) in the region of the convex portion (200), and the convex portion (200) is formed spherically on the surface of the magnet core (135) facing the contact region (175) of the housing (170), and is formed so as not to contact the housing (170) in the section (136) along the longitudinal axis (137) between the convex portion (200) and the second region (139) of the housing (170). Electromagnetic device (105).

2. The electromagnetic device (105) according to claim 1, wherein the housing (170) is in contact with the coil winding frame (128) and applies force to the coil winding frame (128) in a direction laterally with respect to the longitudinal axis (137) of the magnet core (135).

3. The electromagnetic device (105) according to claim 2, wherein the housing area (142) is formed by at least one wall (129), the wall (129) having a first area (131) extending in the direction of the longitudinal axis (137) of the magnet core (135) and at least one second area (132) extending laterally with respect to the longitudinal axis (137) of the magnet core (135), and the housing (170) is in contact with the second area (132) of the wall (129).

4. The electromagnetic device (105) according to claim 1, wherein the housing (170) has an opening (172) the opening (172) has a longitudinal extension along the magnet core (135) with respect to a longitudinal axis (176), the opening (172) surrounds the magnet core (135) in the contact area (175) of the housing (170), and the longitudinal axis (137) of the magnet core (135) is positioned with an angular offset from the longitudinal axis (176) of the opening (172).

5. The electromagnetic device (105) according to claim 1, wherein the magnet core (135) is formed rotationally symmetrically in the first region (138) and the second region (139).

6. The electromagnetic device (105) according to claim 5, wherein the convex portion (200) has a maximum outer diameter (d1) that is larger than the outer diameter (d2) of the magnet core (135) in the second region (139).

7. The electromagnetic device (105) according to claim 1, wherein the magnet core (135) is formed in a cylindrical shape in the second region (139).

8. An electromagnetic device (105) according to claim 1, which is formed as an electromagnetic actuator (100).

9. The electromagnetic device (105) according to claim 8, having a movable magnetic armature body (115) as a movable actuator element that is movable by a magnetic field (180) generated by an electric current passing through the coil (140) and the magnet core (135).

10. The electromagnetic device (105) according to claim 9, wherein the armature body (115) is supported on the coil winding frame (128) or the housing (170).

11. The electromagnetic device (105) is formed as an electromagnetic switching device or valve device (100) comprising a movable magnetic armature body (115) which is a switching element or valve element that is movable by a magnetic field (180) generated by an electric current passing through the coil (140) and the magnet core (135), according to claim 1.

12. The electromagnetic device (105) according to claim 1, wherein the electromagnetic device (105) is formed as an electromechanical relay or solenoid valve (100).

13. The electromagnetic device (105) according to claim 1, wherein the electromagnetic device is formed as a solenoid valve (100) for a vehicle pressure adjustment module or air processing unit.

14. A method for manufacturing an electromagnetic device (105) according to any one of claims 1 to 13, The steps include pre-assembling the coil winding frame (128) and the magnet core (135) to form an assembly, The steps include: installing the assembly, which consists of a coil winding frame (128) and a magnet core (135), into a housing (170); During the assembly of the assembly within the housing (170), the first region (138) of the magnet core (135) rotates relative to the contact region (175) of the housing (170) to center the magnet core (135) laterally with respect to the longitudinal axis (137) of the magnet core (135), The steps include fixing the assembly, which consists of a coil winding frame (128) and a magnet core (135), inside the housing (170), and It has, A method for manufacturing an electromagnetic device (105).

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