WO2016142105A1

WO2016142105A1 - Electromagnetic switching device and method for operating the electromagnetic switching device

Info

Publication number: WO2016142105A1
Application number: PCT/EP2016/052238
Authority: WO
Inventors: Joachim Spratte; Ralf Brüggemann; Andreas SALUM; Wolfgang Fortmann; Jens Kaller
Original assignee: Zf Friedrichshafen Ag
Priority date: 2015-03-06
Filing date: 2016-02-03
Publication date: 2016-09-15
Also published as: DE102015204104A1

Abstract

The invention relates to an electromagnetic switching device (100) comprising an armature component (114) having a protrusion (124), wherein the armature component (114) has a core region and an armature region (126), wherein the core region (128) is surrounded, at least in a partial segment, by the armature region (126), and wherein the armature component (114) is arranged in an armature space (112) in such a way that the armature component can move between a first end position and a second end position. The switching device (100) also has a coil body (110) for a coil (111), wherein the coil body (110) surrounds the armature space (112) and also has a first stop (120) for the protrusion (124) of the armature component (114) for defining the first end position of the armature component (114) and a second stop (122) for the protrusion (124) of the armature component (114) for defining the second end position of the armature component (114). At least one stop (120, 122) is designed as a rib extending into the armature space (112).

Description

ELECTROMAGNETIC SWITCHING DEVICE AND METHOD FOR OPERATING THE

ELECTROMAGNETIC SWITCHING DEVICE

The present invention relates to an electromagnetic switching device, a method of operating an electromagnetic switching device, and a use of a damping spring for decelerating movement of an armature member of a switching device.

Electromagnets in switching operations are subject to high acoustic demands. You must both energized, as well as drive without noise in the end positions. When energized, the armature of a switching operation is accelerated via the coil current and moved to the end position. Unenergized, the actuation usually takes place via a return spring. The damping of the end position of the armature component in the energized state can be done by a provocative demolition of the magnetic flux and on the other by a highly progressive elastomeric spring. In the de-energized state, the damping of the end position can be done exclusively by an elastomeric spring.

DE 10 2006 015 233 A1 describes an electromagnetic actuating device with an armature movably guided in a housing and a coil device provided stationarily in the housing and designed for cooperation with the armature.

Against this background, the present invention provides an improved electromagnetic switching device, an improved method of operating an electromagnetic switching device, and a novel use of a damping spring according to the main claims. Advantageous embodiments will become apparent from the dependent claims and the description below.

An electromagnetic switching device has the following features:

an anchor component having a web, wherein the anchor component has a core region and an anchor region, wherein the core region is enclosed by the anchor region, at least in a subsection, and wherein the anchor component is anchored in an anchor region. is movably arranged between a first end position and a second end position;

a spool for a spool, the spool enclosing the armature space; and

a first stop for the web of the armature component for defining the first end position of the armature component and a second stop for the web of the armature component for defining the second end position of the armature component, wherein at least one stop is designed as a rib extending into the armature space.

An electromagnetic switching device can be understood as a switching operation or adjusting device. The switching device may be provided for example for a vehicle. At least the anchor portion of the anchor member may be made of a ferromagnetic material. The bobbin may comprise the coil. The coil can be designed to generate a magnetic field in the energized state. The anchor component can be a magnet. The armature component may be arranged so that the armature region of the armature component is within the influence of the magnetic field generated by the coil. Caused by the magnetic field acting on the armature area, the armature component can be set in motion. The movement of the armature component can be limited by one of the stops. The movement of the armature component can take place along a movement axis. The web and the rib may extend radially with respect to the axis of movement. The web and the rib can have an overlap parallel to the axis of movement. The anchor component can represent a magnet armature. The core portion may be formed to perform switching functionality of the switching device, for example, by actuating the armature member to actuate an element to be operated by the switching device to perform a switching function. For example, the core area can serve as a ram, which can perform the relevant functions of the switching device. The core region may be cylindrical. For example, the armature component can be moved by energizing the coil to the first stop and into the first end position. By a return spring, the armature component can be moved to the second stop and in the second end position after completion of the energization of the coil. For example, the core area may be between a first end of the Ankerbauteils and the anchor region by such a return spring for returning the armature component from the first end position to the second end position to be performed.

According to one embodiment, the switching device may comprise at least one damping spring, which is arranged between the at least one stop and the web. The damping spring can be compressed to a compression point when the armature component is in the end position defined by the at least one stop. In this case, the at least one damping spring having a progressive spring characteristic with a kink between a first portion of the spring characteristic and a second portion of the spring characteristic. At least one of the sections of the spring characteristic may have an at least approximately linear course. The compression point may be located in the second portion of the spring characteristic. By the compression point, to which the damping spring is compressed by the armature member is located in the portion of the spring characteristic, in which the damping spring has a greater spring stiffness, the end position can be defined very well. As a result, the end position can be defined without great tolerances.

For example, the at least one damping spring can be designed as a foam element. Such a foam element may consist of silicone foam. Such a foam element can advantageously be produced with a progressive spring characteristic. Furthermore, a temperature response of the spring characteristic can be constant. As a result, a displacement of the end position at different temperatures of the damping spring can be avoided.

According to one embodiment, the bobbin can form at least one of the stops. The other of the stops can also be formed by the bobbin or by a rigidly connected to the bobbin element. In this way, a position of the stop can be defined very precisely.

A length of the rib extending transversely to a direction of movement of the armature component between the first and the second end position into the armature space may be longer than a thickness of the rib along the direction of movement of the anchor member. Thus, the rib can be made very narrow. As a result, an influence of the magnetic field can be avoided by the shaped as a rib stop.

According to one embodiment, the first stop may be designed as a first rib extending into the armature space and the second stop as a second rib extending into the armature space. In this way, influencing the course of the magnetic field through the two stops can be largely avoided.

The switching device may comprise a first damping spring and a second damping spring. The first damping spring may be disposed between the first stop and the land and compressed to a first compression point when the anchor member is in the first end position. The second damping spring may be disposed between the second stop and the web and compressed to a second compression point when the anchor member is in the second end position. In this case, the damping springs may each have a progressive spring characteristic with a kink between a first portion of the spring characteristic and a second portion of the spring characteristic, wherein the compression points may each be arranged in the second portion of the spring characteristic. In this way, both end positions can be defined very precisely.

In this case, the first damping spring on a side facing the first stop of the web of the anchor member and the second damping spring may be disposed on a second stop facing side of the web of the anchor member. In this way, the damping springs can be moved with the anchor member. Alternatively, at least one of the damping springs may be attached to the corresponding stop.

The switching device may comprise a first pole plate and a second pole plate. The bobbin can be connected between the first pole plate and the second pole plate. be ordered. The pole plates serve to guide the magnetic field generated by the coil. The pole plates may represent magnetic poles for moving the armature component in response to the magnetic field generated by the coil.

The switching device may have at least a first fixing point and a second fixing point for fixing the switching device in a device. In this case, the first fixing point may be arranged on the coil body on the side of the first pole plate, and the second fixing point may be arranged on the coil body on the side of the second pole plate. The fixation points can be designed to record reference pins of the device. The device may be, for example, a selector lever housing of a vehicle. Due to small tolerances of the end positions of the anchor component, the tolerances of the fixing points can be kept small.

According to one embodiment, the anchor component may be made in one piece. In this case, the anchor portion and the core portion are formed of one part. As a result, the manufacturing costs can be reduced compared to a two-piece executed anchor component.

In this case, the core region between a first end of the armature component and the armature region may have a circumferential groove for forming a magnetic flux barrier. Through the flow barrier, the magnetic field flowing through the armature component can be concentrated on the anchor area.

The anchor component can form a magnetic anchor. As an alternative to a one-part embodiment, the anchor component can also be designed in two parts. The anchor region may in such case be an anchor made of ferromagnetic material. The core region may be a non-ferromagnetic core.

According to one embodiment, the anchor region may have an extension at an end facing the first end of the anchor component. The switching device may include an inlet cone connected to the bobbin for receiving having the extension when the anchor member is in the first end position. In this case, the first stop can be configured as a rib and arranged on an end of the inlet cone facing the web of the anchor component. The inlet cone may be part of the bobbin or be designed as a separate and rigidly connected to the bobbin part. The inlet cone can be located on the end of the energized end position and can be used to increase the flux and to control the movement of the armature component.

The web of the anchor component may be designed as a circumferential outer bulge of the anchor region. The web can thus represent a ring surrounding the anchor area. A length of the web extending transversely to the direction of movement of the armature component in the direction of the bobbin may be longer than a thickness of the web along the direction of movement of the armature component. The web can thus extend radially with respect to the axis of movement of the armature component. The bridge can be made very thin. Thereby, an influence of the magnetic field can be minimized by the presence of the web.

In order to minimize the friction of the armature component, the switching device may have bearing bushes for the armature component PTFE (polytetrafluoroethylene) coated sliding liners.

A method of operating an electromagnetic switching device having an armature component with a web, wherein the armature component has a core region and an anchor region, wherein the core region is enclosed by the anchor region in at least a partial section, and wherein the armature component is located in an armature space between a first end position and an armature space second end position is movably arranged, further comprising a bobbin for a coil, wherein the bobbin enclosing the armature space and further comprising a first stop for the web of the anchor member for defining the first end position of the anchor member and a second stop for the web of the anchor member for defining The second end position of the armature component, wherein at least one stop is designed as a rib extending into the armature space, comprises the following steps: Causing movement of the armature component in the direction of the at least one stop;

Braking the movement of the anchor member by compressing a damping spring disposed between the web and the at least one stopper having a progressive spring characteristic with a kink between a first portion of the spring characteristic and a second portion of the spring characteristic; and

further decelerating the movement of the armature member by further compressing the damping spring is to a compression point, which is arranged in the second portion of the spring characteristic.

As a result of the further braking, the movement of the armature component can be slowed down until the armature component stops. The compression point can represent a point that is very precisely defined with regard to its local position, at which point the armature component comes to rest in the end position.

An embodiment of the described approach may thus be based on the use of a damping spring having a progressive spring characteristic with a kink between a first portion of the spring characteristic and a second portion of the spring characteristic for braking movement of an armature component of a switching device with the armature component with a web, wherein the anchor member has a core portion and an anchor portion, wherein the core portion is enclosed at least in a portion of the anchor portion, and wherein the anchor member is movably disposed in an armature space between a first end position and a second end position, further comprising a bobbin for a coil, wherein the bobbin encloses the armature space and further comprising a first stop for the web of the anchor member for defining the first end position of the anchor member and a second stop for the web of the anchor member for defining the second end position de s anchor component, wherein at least one stop is designed as an extending into the armature space rib. The invention will be described by way of example with reference to the accompanying drawings. Show it:

Fig. 1 is a schematic representation of an apparatus with a switching device according to an embodiment of the present invention;

Fig. 2 is a side view of a switching device with cut lines A-A and B-B according to an embodiment of the present invention;

3 is a sectional view of a switching device along the section line A-A according to an embodiment of the present invention;

4 is a sectional view of a switching device along the section line B-B according to an embodiment of the present invention;

5 is a sectional view of a switching device according to an embodiment of the present invention;

Fig. 6 is a spring characteristic of a damper spring according to an embodiment of the present invention;

7 is a diagram illustrating tolerance ranges of a switching device according to an embodiment of the present invention; and

8 is a flowchart of a method of operating an electromagnetic switching device according to an embodiment of the present invention.

In the following description of preferred embodiments of the present invention, the same or similar reference numerals are used for the elements shown in the various figures and similarly acting, wherein a repeated description of these elements is omitted.

1 shows a schematic representation of a device with a switching device 100 according to an embodiment of the present invention. The device may be an assembly of a vehicle, for example an assembly of the drive and chassis technology, such as a dial for a transmission of a motor vehicle. The switching device 100 is arranged in a housing 102, for example a selector lever housing, and designed to actuate an element 104, for example a selector lever, of the device. The switching device 100 has a bobbin 1 10 for a coil 1 1 1. The bobbin 1 10 encloses an armature space 1 12. Within the armature space 1 12, an anchor member 1 14 is movably arranged. The anchor member 1 14 is movably mounted and can perform a movement 1 16 along a movement axis 1 18. The movement 1 16 of the armature component 1 14 is limited by a first stop 120 and a second stop 122 between a first end position and a second end position. For this purpose, the armature component on a web 124 which abuts in the first end position of the armature component 1 14 at the first stop 122 and in the second end position of the armature component 1 14 at the second stop 124. At least one of the stops 120, 122 has the shape of a rib. The stops 120, 122 extend from an armature space 1 12 facing side of the bobbin 1 10 in the armature space 1 12 into it.

The armature component 14 has an armature region 126 and a core region 128. If the coil 1 1 1 flows through electrical current, then a magnetic field builds up, through which the armature region 126 of the armature component 1 14 is pulled, for example, in the direction of the first stop 120. Thereby, the core portion 128, which is designed as a plunger according to this embodiment, for example, moves toward the element 104 and abuts against the element 104 to perform a switching operation.

Between the web 124 and the stops 120, 122 may each have a damping spring for damping a stop of the web to the stops 120, 122 may be arranged. The damping springs may for example consist of an elastomer, such as a silicone elastomer, so be designed as an elastomer damper. At least one of the stops 120, 122 may form a defined contact surface for an elastomer damper carried along on the armature 1 14.

Fig. 2 shows a side view of a switching device 100 with section lines AA and BB according to an embodiment of the present invention. In Fig. 2, a first end of the core portion 128 of the anchor member is seen. According to this exemplary embodiment, the core region 128 of the armature component has a circular cross section. A central portion of the bobbin 1 10 is characterized by a pole plate 230 hidden. The pole plate 230 has a circular passage opening for an inlet cone 232. The core region 128 is guided by a sleeve bearing sleeve 240.

FIG. 3 shows a sectional view of a switching device 100 along the section line A-A shown in FIG. 2 according to an embodiment of the present invention.

As already described with reference to FIG. 1, the switching device 100 has a bobbin 1 10, within which an armature component 1 14 along a movement axis 1 18 is mounted linearly movable. The movement axis 1 18 may be an axis of symmetry of the armature component 1 14. The bobbin 1 10 may have a designed as a disk coil section for receiving the windings of the coil 1 1 1. Adjacent to the side windows of the bobbin 1 10, the switching device 100 has a first pole plate 230 and a second pole plate 330. The pole plates 230, 330 are aligned parallel to the side windows and at right angles to a bottom surface of the bobbin 1 10 connecting the side windows. At one of the first pole plate 230 facing the end of the armature space 1 12, an inlet cone 232 is arranged.

The inlet cone 232 is adjacent to the armature space 1 12 facing surface of the base surface of the bobbin 1 10 and extends over the thickness of the first pole plate 230 up to about half the length of the base of the bobbin 1 10. At the pole plate 230 facing the end On the inlet cone 232 a slide bearing sleeve 240 for supporting the core portion of the anchor member 1 14 is arranged. In the region of a receiving surface for the sliding bearing sleeve 240, the inlet cone has a recess for receiving an end region of an extension of the anchor region of the anchor component 14. In the region of the recess and adjacent to the recess, the inlet cone 232 has a constant wall thickness. Adjacent thereto, an interior of the inlet cone 232 widens conically. On one of the first pole plate 230 facing away from the inlet cone 232 has a kink, through which a in the direction of the movement axis 1 18 aligned finishing rib is formed, which forms the first stop 120. So- with the cross section of the inlet cone 232 on both sides of the movement axis 1 18, at one of the second pole plate 220 facing the end, an L-shaped end portion through which the first stop 120 is formed. One surface of the first stop 120 corresponds to a thickness of the wall of the inlet cone 232 in the region of the end rib. The surface of the first stop is aligned orthogonal to the movement axis 1 18. Starting from the stop rib 120 forming the stop 120, the thickness of the wall of the inlet cone has an abrupt taper to less than half the thickness of the wall of the inlet cone in the region of the end rib, then a section of constant thickness, then a portion of linearly increasing thickness and then one in the recess of the inlet cone 232 for receiving the end portion of the extension of the anchor portion of the anchor member 1 14 reaching portion of constant thickness. The inlet cone 232 may be formed as a rotational body.

At an opposite end of the inlet cone 232 forms the base of the bobbin 1 10 a second stop 122 in the form of a pointing in the direction of the movement axis 1 18 rib. An extension direction of the rib of the bobbin 1 10 is orthogonal to the movement axis 1 18. For forming the second stop 122, the base of the bobbin 1 10 an abrupt, formed here by a right angle, thickening of the thickness of the base. In the area of the rib forming the second stop 122, the thickness of the base area has a constant thickness in order to have an abrupt tapering, here formed by a right angle, to about one half of the base area in the region of the rib. The second stop 122 forming rib may be formed circumferentially around the armature space 1 12 and form a perforated disc. A surface of the rib forming the second stop 122 may be equal in size to a surface forming the first stop 120. The stops 120, 122 may be arranged at the same distance with respect to the movement axis 1 18 opposite to each other.

Adjacent to the second stop 122 forming rib another slide bearing sleeve 242 is arranged. The further plain bearing sleeve 242 extends starting from the second stop 122 forming rib through the second pole plate 330 therethrough.

The anchor component 1 14 is made in one piece. The anchor component can be designed as a rotational body. It has a cylindrical core region, which extends from a first end of the armature component 1 14, on the side of the first pole plate 230, to a second end of the armature component 1 14, on the side of the second pole plate 330. A length of the anchor member 1 14 is longer than a distance between outer surfaces of the pole plates 230, 330. Placed disposed in the direction of the second end, the anchor member 1 14 has an anchor region surrounding the core region. In the anchor area, the anchor component 1 14 has a greater thickness than in the core area. In this case, the anchor region does not extend to the armature component 1 14 facing ends of the stops 120, 122 zoom. The anchor portion is formed as a cylinder having an annular ridge 124 extending beyond a major surface of the anchor portion. In the area of

Web 124, the anchor member 1 14 has a greater thickness than in the remaining area of the anchor area. A length of the web corresponds approximately to three times the thickness of the web 124. The web 124 projects into a space formed between the stops 120, 122. In this case, a gap remains between a coil body 1 10 facing the end of the web 124 and the bobbin. On both sides of the web 124, the anchor component 1 has 14 circumferential grooves.

In a on the first stop 120 facing side of the web 124 arranged groove a first damping spring 350 is arranged. The first damping spring 350 extends over a length of the web 124 and abuts against the web 124. For example, a thickness of the first damper spring 350 may be equal to or less than a thickness of the ridge 124. In a on the second stop 122 facing side of the web 124 arranged groove a second damping spring 352 is arranged. The second damping spring 352 extends over a length of the web 124 and abuts against the web 124. For example, a thickness of the second damper spring 352 may be equal to or less than a thickness of the ridge 124. The damping springs 350, 352 may each be designed as rings. The damping springs 350, 352 move with a movement of the armature component 1 14 with the armature component 1 14 with.

A portion of the anchor region lying between the first damping spring 350 and a first end of the anchor region is designed as an extension. The extension is formed by a wedge-shaped groove extending from the first end of the anchor portion adjacent to the core portion. The wedge-shaped groove has an in the depth of the groove in a linearly tapering clear width. Thus, the anchor portion is tapered toward the first end, but at the first end itself has a flattened end portion.

A return spring 354 is disposed between the anchor portion and the slide bearing sleeve 240. According to this embodiment, the return spring 354 is designed as a spiral spring, which abuts at one end on the slide bearing sleeve 240 and at the other end to the bottom of the wedge-shaped groove of the anchor region. The core region of the armature component 1 14 is guided by the return spring 354.

Between the anchor region and the first end of the core region, the core region has a circumferential groove 356 as magnetic flux barrier. An armature region facing the end of the groove 356 is disposed at the level of the first end of the anchor region, thus at the level of the free end of the extension of the anchor region.

In Fig. 3, the anchor member 1 14 is shown in a first end position. In the first end position, the armature component 1 14 is pressed by the restoring force of the return spring 354 against the thin-walled second stop 122. In this case, the second damping spring 352 is pressed by the web 124 against the second stop 122. The second damping spring 352 is compressed up to a compression point of the second damping spring 352.

If the coil 1 1 1 is energized, then a magnetic field acts on the anchor region of the armature component 1 14 and the armature component 1 14 is opposite to the restoring force the return spring 354 moves in the direction of the first stop 120 until the first damping spring 350 is pressed by the web 124 against the thin-walled first stop 120. The movement of the armature member 1 14 terminates in a first end position when the first damping spring 350 is compressed to a compression point of the first damping spring 350. In the first end position, the extension of the armature component 1 14 overlaps with the inlet cone 232.

The coil 1 1 1 is disposed between the base of the bobbin 1 10 and a cover member 358 of the bobbin 1 10. The cover element 358 may be rigidly connected to the bobbin 1 10. The cover element 358 may be cylindrical as well as the base. The cover element 358 can be considered as a part of the bobbin 1 10. The composite of bobbin 1 10 and cover member 358 may also be referred to as a magnetic housing.

In the described construction, the surfaces of the stoppers 120, 122 against which the damping springs 350, 352, for example elastomer springs or elastomer dampers run, are not formed by the sleeves 240, 342 or massive wide-walled stops. The stops 120, 122 are due to their arrangement on the bobbin no or only minor assembly and manufacturing tolerances. Therefore, the end positions of the armature representing an armature component 1 14 with very small tolerances arise.

In the concept described here, the end positions of the armature component 1 14 are described very accurately and the damping springs 350, 352 get a clearly described contact surface as a plant 120, 122. By a precise end position, the system tolerances can be narrowed and so the power consumption of the magnet can be reduced ,

According to one embodiment, a one-piece anchor 1 14 is used with a flow barrier 356 instead of a two-piece executed anchor. On the one hand, this reduces the number of individual parts and, on the other hand, reduces the positional tolerances of the armature 14. The flow lock 356 can be realized by means of a puncture which causes a constriction of the magnetic flux. In the current-carrying state of the coil 1 1 1, a magnetic field is generated by the coil 1 1 1, wherein the magnetic field lines of the magnetic field through the coil 1 1 1, the pole plates 230, 330, the inlet cone 232 and the anchor region of the armature component 1 14 run.

4 shows a sectional view of a switching device 100 along the section line B-B shown in FIG. 2 according to an embodiment of the present invention. The switching device 100 has the elements already described with reference to FIG. 3. In addition, three reference pins 461, 462, 463 are shown in FIG. The reference pins 461, 462, 463 may be designed as pins, for example in the form of truncated cones. The reference pins 461, 462, 463 may be part of a housing or structure in which the switching device 100 is incorporated. The pole plates 230, 330 have through openings for the reference pins 461, 462, 463. In this way, the reference pins 461, 462, 463 are guided in the installed state of the switching device 100 through the pole plates 230, 330 and are at fixing points 465, 466, 467 of the bobbin 1 10 at. According to this embodiment, the fixing points on a parallel to the base surface of the bobbin 1 10 extending cover member 358 of the bobbin 1 10 are arranged. Between the cover element 358 and the base of the bobbin 1 10 of the bobbin 1 10 forms a cavity in which the coil 1 1 1 is arranged. The lid member 358 and the base of the bobbin 1 10 may be rigidly connected together.

According to this embodiment, the reference pins 461, 463 are guided by the first pole plate 230. In this case, the core region of the armature component 1 14 is arranged centrally between the reference pins 461, 463. The reference pin 462 is guided opposite to the reference pin 461 by the second pole plate 330.

The referencing of the magnet in an assembly of any vehicle may now take place via reference pins 461, 462, 463 instead of over the outer surfaces 230, 330 of the magnet, which would result in the pole plate thickness and the joint tolerances in the overall tolerance of positioning and armature lift of the magnet housing, whereby the magnet housing for positioning can be significantly reduced. The reference pins 461, 462, 463 can in this way be coupled directly to the stops 120, 122 via the magnet housing. The magnet housing can be composed of the bobbin 1 10 and the lid member 358.

Reference pins 461, 462, 463 may, for example, be reference pins from a selector lever housing.

5 shows a sectional view of a switching device 100 according to an embodiment of the present invention. The switching device 100 has the elements already described with reference to FIG. 3. FIG. 5 shows the core region 128 and the anchor region 126 of the armature component. The anchor component can be made in one piece, that is to say produced in one piece, or be composed of a part forming the core region and a part forming the anchor region.

According to one embodiment, the damping springs 350, 352 designed to reduce the position tolerances as foam. For the damping springs 350, 352, a thin foam can be used. A width of the damping springs 350, 352 parallel to the movement axis 1 18 may be smaller than a height of the damping springs 350, 352 transverse to the movement axis 1 18. The stop 120 may form a defined stop for the foam of the damping spring 350 as a rib from the inlet cone 232. The stop 122 may form a defined stop for the foam of the damping spring 352 as a rib from the bobbin 1 10. The anchor region 1 16 and the core region 1 18 may be merged into one component. The spring tolerances of the return spring 354 can be narrowed to 10% market. According to different embodiments, with respect to the return spring 354, other materials, such as spring bronze, and setting can be used.

Fig. 6 shows a spring characteristic of a damper spring according to an embodiment of the present invention. This can be a reference to the act previously described figures damping spring, which is arranged between the web and one of the stops of the switching device.

The spring characteristic is plotted in a graph in which the abscissa plots the compressions [s] of the damping spring and the ordinate the force [F] of the damping spring.

The spring characteristic has a first portion 671 and a second portion 672. The sections each have a linearly rising profile, wherein a pitch of the second section 672 is greater, for example, more than four times or more than six times as large as the pitch of the first section 671. The first section begins in the relaxed state of the damper spring. When the damper spring is compressed within the first portion 671 by a compression stroke As1, the spring force of the damper spring increases by an amount AF. If the damping spring within the second section 672 is about a compression travel As2, which is substantially smaller than the compression travel As1, the spring force of the damping spring also increases by the amount AF. The kink between sections 671, 672 may be rounded. Thus, the damping spring has a highly progressive characteristic.

The compression point 675 of the damping spring, at which the armature component is damped by the damping spring in an end position, is arranged in the second section 672. Thus, the magnetic force of the coil or the restoring force of the return spring of the switching device is selected so that the forces counteracting these forces spring force of the damping force is reached only when the first portion 671 of the spring characteristic of the damping spring is exceeded.

The damping spring is designed according to this embodiment as an elastomer damper, which in turn may be designed as a foam. Such a foam has a force / displacement characteristic with a distinct kink. The end position at which the damper spring is compressed to the maximum is not set as usual on the flat portion 671 of the characteristic (AF in As1), but in FIG the beginning of the steep section 672 (As2). With the same force tolerance, this results in a very small path tolerance (As2).

The measures described above lead to a significant reduction in the path tolerances. This can be reduced at the same coverage in the locked state (worst case), the armature stroke. With a reduced armature stroke and the operating current can be reduced. This can be achieved by thinner coil wire, which reduces the copper content and the power consumption of the magnet.

The described approach offers a potential for tolerances. Thus, the joining tolerance for the stainless steel core in the anchor component is ± 0.1 mm. Changing the reference to 24.9 ± 0.15 instead of 30.4 ± 0.23 results in a potential of ± 0.08mm. When switching to Bisco BF1000 in 1, 67mm ± 10% instead of 2.53 ± 10% results in a potential of ± 0.09mm. From the spring tolerance of ± 20% to ± 10%, there is a potential over foam of ~ ± 0.2mm. From the improvement of the foam in the end position, there is a potential over foam of ~ ± 0.15mm. As sum we have reached ~ ± 0.62mm. The resulting stroke reduction is 1, 22mm. The savings in the end position tolerance can be used to reduce the stroke. The worst case coverage remains the same.

Fig. 7 is a diagram showing tolerance ranges of a switching device according to an embodiment of the present invention. It may be a switching device described with reference to the preceding figures.

In the diagram shown, the abscissa represents the stroke in millimeters and the ordinate the force in Newton of a damping spring.

A tolerance 781 of a stroke initial position may be 1.45 mm and a tolerance 782 of a stroke end position 782 may be 0.95 mm. Shown is a tolerance band 783 of the damping spring. As shown by dashed line 784, which is within tolerance band 783, it is possible to reduce the spring tolerance from ± 20% to ± 10%. Thus, the upper force can be lowered while maintaining the minimum force. As shown by the horizontal dashed line 785, by using an asymmetric damper spring, a kink in the characteristic can be tolerated. Thus, the upper force can be lowered while maintaining the minimum force. This results in a potential of 0.4N corresponding to 36%.

Furthermore, a guarantee characteristic curve 786 (10.5V / 90 ° C / 100% ED) for a horizontal measuring position with compression spring is shown.

8 shows a flow chart of a method of operating an electromagnetic switching device according to an embodiment of the present invention. It may be a switching device described with reference to the preceding figures.

In a step 891, a movement of the armature component in the direction of a stop of the adjusting device is effected. The movement can be caused for example by a magnetic field or by a return spring. In a step 893, the movement of the armature component is decelerated. This is done by compressing a damping spring located between a web of the anchor member and the stopper. In a step 895, the movement of the armature member is further decelerated by further compressing the damper spring beyond a bend in a progressive spring characteristic of the damper spring to a compression point of the damper spring. When the damping spring has reached the compression point, the armature component has been decelerated to a standstill and is in an end position defined by the stop.

The embodiments described and shown in the figures are chosen only by way of example. Different embodiments may be combined together or in relation to individual features. Also can one Embodiment be supplemented by features of another embodiment.

Furthermore, method steps according to the invention can be repeated as well as carried out in a sequence other than that described.

If an exemplary embodiment comprises a "and / or" link between a first feature and a second feature, this can be read so that the embodiment according to one embodiment, both the first feature and the second feature and according to another embodiment, either only the first Feature or only the second feature.

reference numeral

100 switching operation

102 housing

104 element

1 10 bobbin

1 1 1 coil

1 12 Anchor room

1 14 anchor component

1 16 movement

1 18 movement axis

120 first stop

122 second stop

124 footbridge

126 Anchor area

128 core area

230 pole plate

232 inlet cone

240 plain bearing sleeve

330 pole plate

342 plain bearing sleeve

350 first damping spring

352 second damping spring

354 return spring

356 groove

358 Cover element of the bobbin

461 reference pin

462 reference pin

463 reference pin

465 fixation point

466 fixation point

467 fixation point

671 first section of the spring characteristic 672 second section of the spring characteristic

675 compression point

781 tolerance

782 tolerance

783 tolerance band

784 dashed line

785 dashed line

786 Guarantee characteristic

891 step of effecting

893 step of deceleration

895 step of further deceleration

Claims

claims

1 . Electromagnetic switching device (100), characterized in that the switching device (100) has the following features:

an anchor component (1 14) having a web (124), wherein the anchor component (1 14) has a core region and an anchor region (126), wherein the core region (128) is enclosed by the anchor region (126) at least in a subsection, and wherein the anchor member (1 14) is movably disposed in an armature space (1 12) between a first end position and a second end position;

a bobbin (1 10) for a coil (1 1 1), wherein the bobbin (1 10) surrounds the armature space (1 12); and

a first stop (120) for the web (124) of the anchor member (1 14) for defining the first end position of the armature component (1 14) and a second stop (122) for the web (124) of the armature component (1 14) for defining the second end position of the armature component (1 14), wherein at least one stop (120, 122) is designed as a in the armature space (1 12) extending into rib.

2. Switching device (100) according to claim 1, characterized in that the switching device (100) has at least one damping spring (350, 352) which is arranged between the at least one stop (120, 122) and the web (124) and to is compressed to a compression point (675) when the armature component (1 14) is in the end position defined by the at least one stop (120, 122), the at least one damping spring (350, 352) having a progressive spring characteristic with a kink between a first portion (671) of the spring characteristic and a second portion (672) of the spring characteristic, wherein the compression point (675) in the second portion (672) of the spring characteristic is arranged.

3. Switching device (100) according to claim 2, characterized in that the at least one damping spring (350, 352) is designed as a foam element.

4. Switching device (100) according to one of the preceding claims, characterized in that the bobbin (1 10) at least one of the stops (120, 122) ausformt.

5. switching device (100) according to one of the preceding claims, characterized in that a length of transversely to a direction of movement of the armature component (1 14) between the first and the second end position in the armature space (1 12) extending into rib longer, as a thickness of the rib along the direction of movement of the armature component (1 14).

6. Switching device (100) according to one of the preceding claims, characterized in that the first stop (120) as a first in the armature space (1 12) extending into rib and the second stop (122) as a second in the armature space ( 1 12) and the switching device (100) is a first damping spring (350) disposed between the first stop (120) and the web (124) and compressed to a first compression point (675) when the armature member (14) is in the first end position and has a second damping spring (352) disposed between the second stop (122) and the web (124) and compressed to a second compression point (675), when the anchor member (1 14) is in the second end position, wherein the damping springs (350, 352) each have a progressive spring characteristic with a kink between a first portion (671) of the spring characteristic and a second portion (672) of the spring characteristic, wherein the compression points (675) are each arranged in the second portion (672) of the spring characteristic.

7. Switching device (100) according to one of the preceding claims, characterized in that the first damping spring (350) on one of the first stop (120) facing side of the web (124) of the armature component (1 14) and the second damping spring (352) a second stop (122) facing side of the web (124) of the armature component (1 14) is arranged.

8. Switching device (100) according to one of the preceding claims, characterized in that the switching device (100) comprises a first pole plate (230) and a second pole plate (330), wherein the bobbin (1 10) between the first pole plate (230) and the second pole plate (330), and wherein the switching device (100) has at least a first fixing point (465) and a second fixing point (466) for fixing the switching device (100) in a device, wherein the first fixing point (465) on the side of the first pole plate (230) on the bobbin (1 10) is arranged and the second fixing point (466) on the side of the second pole plate (330) on the bobbin (1 10) is arranged.

9. switching device (100) according to one of the preceding claims, characterized in that the armature component (1 14) is made in one piece.

10. Switching device (100) according to one of the preceding claims, characterized in that the core region (128) between a first end of the armature component (1 14) and the anchor region (126) has a circumferential groove (356) for forming a magnetic flux barrier.

1 1. Switching device (100) according to one of the preceding claims, characterized in that the anchor region (126) at an end facing the first end of the armature component (1 14) has an extension and the switching device (100) one with the bobbin (1 10) connected An inlet cone (232) for receiving the extension when the anchor member (1 14) is in the first end position, and wherein the first stop (120) designed as a rib and at one of the web (124) of the armature component (1 14) facing End of the inlet cone (232) is arranged.

12. Switching device (100) according to one of the preceding claims, characterized in that the web (124) of the armature component (1 14) is designed as a peripheral outer bulge of the anchor region (126), wherein a length of the transversely to the direction of movement of the An armature component (1 14) in the direction of the bobbin (1 10) extending web (124) is longer than a thickness of the web (124) along the direction of movement of the armature component (1 14).

13. A method for operating an electromagnetic switching device (100) having an armature component (1 14) with a web (124), wherein the armature component (1 14) has a core region (128) and an anchor region (126), wherein the core region (128 ) is at least in a partial section of the anchor region (126) is enclosed, and wherein the anchor member (1 14) in an armature space (1 12) is movably disposed between a first end position and a second end position, further comprising a bobbin (1 10) for a coil (1 1 1), wherein the bobbin (1 10) surrounds the armature space (1 12) and further with a first stop (120) for the web (124) of the armature component (1 14) for defining the first end position of the armature component (1 14) and with a second stop (122) for the web (124) of the armature component (1 14) for defining the second end position of the armature component (1 14), wherein at least one stop (120, 122) as a in the Anchor space (1 12) extending rib into it rt, characterized in that the method comprises the following steps:

Causing (891) movement of the armature component (1 14) in the direction of the at least one stop (120, 122);

Braking (893) the movement of the armature component (1 14) by compressing a damping spring (350, 352) arranged between the web (124) and the at least one stop (120, 122), which has a progressive spring characteristic with a kink between a first portion the spring characteristic and a second portion of the spring characteristic has; and

further decelerating (895) the movement of the armature member (1 14) by further compressing the damping spring (350, 352) to a compression point (675) disposed in the second portion of the spring characteristic.

14. Using a damping spring (350, 352) having a progressive spring characteristic with a kink between a first portion of the spring characteristic and a second portion of the spring characteristic, for braking a movement of an armature component (1 14) of a switching device (100) with the armature component (1 14) having a web (124), wherein the anchor component (1 14) has a core region (128) and an anchor region (126), wherein the core region (128) is enclosed by the anchor region (126) at least in a subsection. and wherein the armature component (1 14) in an armature space (1 12) between a first end and a second end position is movably arranged, further comprising a bobbin (1 10) for a coil (1 1 1), wherein the bobbin (1 10) surrounds the armature space (1 12) and further with a first stop (120) for the

Web (124) of the armature component (1 14) for defining the first end position of the armature component (1 14) and with a second stop (122) for the web (124) of the armature component (1 14) for defining the second end position of the armature component (1 14), wherein at least one stop (120, 122) is designed as a in the armature space (1 12) extending into rib.