CN104701086B - Reciprocating electromagnet, electromotor, and method for manufacturing reciprocating electromagnet - Google Patents

Abstract

The invention relates to a reciprocating electromagnet (42), in particular a reciprocating electromagnet for an electric motor (100), for example a starter for starting an internal combustion engine, such as a starter relay (42a), comprising at least one coil former (423) and a bobbin case (424) at least partially containing the bobbin (423), the bobbin case has at least one through hole (427) for fixing the reciprocating electromagnet (42), wherein, for at least To adjust in the axial direction, an adjustment unit (400) is provided between the coil frame (423) and the coil frame housing (424) in the axial direction, wherein the adjustment unit (400) is arranged at the end of the through hole (427) in the axial extension. The invention also relates to an electric machine with a reciprocating electromagnet (42) and a method for producing the reciprocating electromagnet.

Description

Reciprocating electromagnet, motor and method for manufacturing reciprocating electromagnet

technical field

The invention relates to a reciprocating electromagnet according to the preamble of claim 1 , in particular a reciprocating electromagnet for an electric machine, for example a starter for starting an internal combustion engine, such as a starter relay.

The invention also relates to an electric machine, in particular a generator, or a starting device, such as a starter with a starter pinion for starting an internal combustion engine, according to the preamble of claim 9 .

The invention also relates to a method according to the preamble of claim 10 for producing and/or assembling a reciprocating electromagnet, in particular suitable as a reciprocating electromagnet for a relay of an electric machine.

Background technique

The invention is based on a system with a starter motor or a starter motor with a starter relay according to the preambles of the independent claims.

The object of the invention is a starter and a starter for a vehicle with an internal combustion engine, and in particular a starter relay for a starter.

The prior art already discloses starters for vehicles with an internal combustion engine, which have a starter relay, which typically include a direct current electric motor for driving the internal combustion engine.

In such a starter or starter motor, for example, a relay fork system with corresponding relays is required for engaging or lifting into the ring gear. During one lift, which is also called distance or more precisely engagement movement, the electromagnetic relay pulls the fork back. This is done by energizing the relays accordingly. When energized, the switching shaft, which interacts with the electromagnet core, moves axially in the direction of the contacts or away from them. Or in other words, there is a relay in the vehicle starter to trigger the axial movement of the starter pinion and to make the electrical contact of the total current. Such relays have a coil that typically includes two windings. During the "armature pull" switching phase, both windings are energized. In the "holding armature" phase only the so-called holding winding is energized. The other winding is called the pull winding or pull-in winding. The two windings are usually wound on top of each other, ie in layers, onto the same winding carrier or coil former in two production steps.

An electric motor with relays is known from DE 197 45 937 C1. The relay includes a winding body or a coil body to wind a corresponding coil. The bobbin is accommodated in a relay pot as a housing. For further securing, bolts are provided in the relay pot. The bolt engages the relay pot through a threaded hole. For axial fixation, elastic moldings are provided on the radially inner side, on the armature side, on the coil former. In the assembled state, the molded part cooperates with the base of the relay pot.

CN 101964278 A discloses a relay with a shoulder formed on the coil former. The shoulder projects into a through hole on the bottom of the relay pot. The bottom of the relay pot additionally has threaded holes. There is no shoulder in the area of the threaded hole. In the region of the through-opening, the shoulder is partially located in the through-opening and not axially between the coil former and the relay pot.

Further reciprocating electromagnets are known from DE 40 06 796 A1 and DE 197 43 122 A1.

Contents of the invention

The advantages of the reciprocating electromagnet (derelektrische Hubmagnet) according to the invention, the motor according to the invention and the method according to the invention with respect to the prior art with the features of the corresponding main claim or the side claims are that the reciprocating electromagnet, in particular is a reciprocating electromagnet for an electric motor, such as a starter for starting an internal combustion engine, such as a starter relay, comprising at least one bobbin and a bobbin housing at least partially accommodating the bobbin, the bobbin housing having at least one through Holes for fixing the reciprocating electromagnet, wherein, for adjustment at least in the axial direction, an adjustment unit is arranged axially between the bobbin and the housing of the bobbin, wherein the adjustment unit is arranged in an axial extension to the through hole In the case of such a reciprocating electromagnet, not only axial fixation but also tolerance compensation can be achieved in cooperation with a screw protruding through the through-opening or another connecting element. Preferably, the adjusting unit is formed in one piece with the coil carrier or the coil body, so that no further components are required for axial fixing or tolerance compensation. Simple handling is possible in this way. The number of parts and the number of assembly steps are thus reduced. An improved function is ensured by arranging the adjusting unit in the region of the axial extension of the through-opening for the connection element, since tolerance compensation and axial fixation can also be achieved by the connection element. In this case, the adjusting unit is arranged between the coil former and the coil former housing, also referred to as relay pot, which accommodates the coil former. Consequently, the adjustment unit does not protrude into possible openings of the coil former or the coil former housing. Instead, the adjusting unit is arranged between two mutually facing end sides, ie between an end side of the coil former and an end side of the coil former housing. Apart from the adjustment unit, these end sides are therefore preferably designed without projections. In this case, the bobbin housing and the bobbin are configured coaxially with respect to one another. The bobbin housing has at least one, preferably two, through-openings for each receiving a connecting element. The connecting element extends in the direction of the coil frame through the through hole. In the assembled state, the connecting element contacts the adjustment device. Preferably, the adjustment device at least partially surrounds the respective connecting element. Preferably, the connecting element is designed as a threaded screw. Correspondingly, the through-hole is formed with a cooperating internal thread. Preferably, the adjustment unit is arranged opposite the through-opening, so that an interaction with a connecting element protruding through the through-opening is possible.

Advantageous further developments and improvements of the arrangement specified in the independent and co-ordinated claims can be advantageously achieved by means of the measures listed in the subclaims.

In one embodiment it is provided that the adjustment unit is formed as a molded part, in particular as an integrated molded part, on the end face of the coil former directed towards the bottom of the coil former housing. Preferably, the adjustment unit is configured as a shoulder, a molding, a projection and/or a dome. For this purpose, in one embodiment, the adjustment unit is provided according to the through-opening and/or according to the connecting element. Preferably, the adjusting unit is integrated in one piece with the coil former, ie is designed integrally with the coil former. Preferably, the molding extends in the main axial direction. Accordingly, the molded part is preferably configured conically or cylindrically. Preferably, the main axial direction or longitudinal axis of the molded part is coaxial with the through opening.

A further embodiment provides that the adjustment unit has a region that is flexible at least in a direction transverse to the axis of the passage opening. In this way, yielding of the adjusting device is ensured under the action of a substantially axial force caused by contacting at least the connecting element of the adjusting device. In another embodiment, the adjustment unit has an axially flexible region. Furthermore, it is preferred that the adjusting unit has a region that is flexible not only in the axial direction but also in the radial direction or transversely. In one embodiment, the flexible region is designed as a substantially elastic region. In a further embodiment, the flexible region is designed as a substantially plastic region. In another embodiment, a plurality of regions or a combination of plastic and elastic regions is provided.

Furthermore, in one embodiment, the adjustment unit has at least one receptacle for a connecting element protruding through the through opening. The adjustment unit accordingly has a groove, a profile, a blind hole or the like. Preferably, each connecting element is provided with a receptacle. In one embodiment, the receptacle has an internal thread. Preferably, the thread corresponds to the thread of the connecting element. In one embodiment, the connecting element has a self-tapping thread which causes a corresponding material deformation in the adjusting unit.

A further embodiment provides that the adjustment unit has an end region that diverges in the direction of the base. In this way, it is ensured that the connecting element protruding from the through opening in the direction of the coil former is reliably inserted into the receptacle or arranged centrally with respect to the adjustment unit. In one embodiment, the end region is funnel-shaped. In this case, the end region is preferably designed to be flexible.

Furthermore, in one embodiment, the adjusting unit is configured as a blind hole. In this case, the blind hole corresponds to the projection of the connection element. In particular, the axial length of the blind hole or generally the axial length of the receptacle is configured such that the end of the connecting element contacts the outermost end at the maximum distance between the coil former and the coil former housing. The end region, and at a minimum of this distance, the end of the bolt just does not touch the bottom of the receptacle or the blind hole.

In a further embodiment it is provided that the adjusting unit has at least one slot, so that the adjusting unit is shaped in the form of an expansion bolt. In this way, a connecting element having a larger dimension in the direction transverse to the longitudinal axis than the receptacle can be securely accommodated in the receptacle, since the receptacle can expand or expand transversely to the longitudinal axis. A reliable interaction is thereby achieved even if the connecting element and the receptacle are not aligned coaxially.

Furthermore, it is provided in one embodiment that the adjusting unit has a plurality of flexible webs protruding from the end side and spaced apart by gaps in the circumferential direction, wherein at least two web ends are connected via the web ends. The end stop element is connected. The web ends are configured in the manner of posts protruding axially from the front side of the coil former. These columns are connected at their ends by ring elements. In one embodiment, the posts are configured rectilinearly. In another embodiment, the column is curved. Yet another embodiment provides a construction with shoulders. On contact with the connecting element, the force is distributed from the connecting element through the ring element to the post, which then bends accordingly. In another embodiment, another shape, for example a closed planar shape, is provided instead of the ring element.

An electric machine according to the invention, in particular a generator, or a starting device, such as a starter with a starter pinion for starting an internal combustion engine, comprises at least one relay, wherein the relay comprises at least one aforementioned reciprocating electromagnet, the electric machine being The advantage of the prior art is that not only the number of parts is reduced but also the number of assembly steps is reduced. Furthermore, a functional improvement is achieved with regard to tolerance compensation and with regard to the axial fixation of the coil former. At least one first conductor winding and at least one second conductor winding are wound around a common coil body to form a coil or a coil winding. Reciprocating electromagnets can be manufactured more quickly and at lower cost.

In the method according to the invention for producing and/or assembling a reciprocating electromagnet, in particular a reciprocating electromagnet suitable as a relay for an electric machine as described above, the coil former is accommodated at least partially in the coil former housing, and the coil former The housing is used for further fixing by means of connecting elements protruding through corresponding through-holes in the direction of the coil former, wherein an adjustment unit is provided between the coil former and the coil former housing for adjustment at least in the axial direction , wherein the adjustment unit is arranged in the axial extension to the through-bore, this method has the advantage over the prior art that it is produced in a very small number of steps. In particular, separate tolerance adjustments or axial play fixes become redundant, since the tolerance adjustments or axial play fixes are carried out by means of the connecting element together with the fixing of the reciprocating electromagnet. In this method, in one embodiment all conductor windings are wound around the coil former at the same time. In this case, two conductor windings are simultaneously wound around the former at least in sections. In a further embodiment, at least two conductor windings are wound successively around the coil body. The adjustment unit is designed as a molded part on the end side of the coil former. The adjusting unit is arranged opposite the corresponding through-opening. The adjusting unit is designed integrally with the coil carrier. The molded part is configured with flexible regions. Furthermore, a receptacle for the connecting element is formed in the molded part. The sides in the molded part are formed with slots. At one end region, the molded part is configured to expand radially outward. The connecting element is guided through the through-opening to the adjustment unit or into the adjustment unit. Here, the connecting element cooperates with the receptacle.

In one embodiment, at least two mutually different conductor windings are wound around the former. In another embodiment, two identical conductor windings are wound around the former. In yet another embodiment, at least two of the conductor windings are wound around the bobbin with different numbers of turns. In another embodiment, the conductor windings are wound with the same number of turns.

The winding body or coil body is designed such that it has a molding in the form of a dome in the region of the connection element in the form of a relay screw. The dome may include a cylindrical hole having a diameter smaller than the thread diameter of the relay bolt. The length of the dome is such that the ends of the bolts lie exactly on the dome when the distance between the winding body and the bottom of the former housing is at a maximum. At the smallest distance, the end of the bolt almost reaches the bottom of the vault hole. The principle of operation in the case of an average tolerance range is as follows. If a screw is screwed into the coil former housing, which is designed as a relay housing, it also enters the cylindrical bore of the dome. Here, the thread of the screw presses/punches into the considerably softer plastic material of the winding body or coil body and thus achieves a primarily form-fit connection between the two parts. A possible variant is a variant with one or more slots in the vault. It can be used, for example, when the plastic deformation of the screw is greater than the elongation at break of the plastic material of the dome. Another refinement consists in that one end region of the dome has a funnel which is slightly open relative to the longitudinal axis of the relay or of the through opening. The funnel is configured such that the relay bolt just touches the inner surface of the funnel at its largest diameter when the distance between the coil former and the coil former housing is at a maximum. When the distance between the bobbin and the casing of the bobbin is small, the screw locally bends the funnel outward and deforms it plastically. This deformation results in an axial fixation of the coil former. Since the relay is usually fixed by means of two or more screws arranged symmetrically, the forces generated by the curved funnel do not lead to a radial movement of the winding body. Another variant is the use of joint surfaces with bendable supports. This design has an annular joint surface with two rectangular bendable supports. When the screw is screwed in, the tip presses against the joint surface and thus deforms the support located below the joint surface. Variants are various geometries of the joint surfaces (circular, circular, rectangular, etc.) and different numbers and shapes of supports. If the tolerance width between the coil former and the coil former housing is correspondingly small, the joint surface can also be supported directly on the bottom of the relay housing without relying on the screws. During assembly of the coil former, the supports are deformed according to the tolerance range and thereby fix the coil former. The through-hole has an internal thread, in particular an internal thread corresponding to the external thread of the connecting element.

Description of drawings

Exemplary embodiments of the invention are shown in the drawings and explained in more detail in the following description. In the attached picture:

Figure 1 shows a starter device with a switch-on relay in a cross-sectional view,

FIG. 2 shows a part of a switch-on relay with a regulating unit in a sectional view,

FIG. 3 shows in a schematic sectional view a part of an on-relay with an adjusting unit of a first embodiment, the adjusting unit having a connecting element in a first state,

FIG. 4 shows in a schematic sectional view the adjustment unit according to FIG. 3 with the connecting element in a second state,

FIG. 5 shows a further embodiment of the adjustment unit in a schematic perspective view,

FIG. 6 shows in a schematic sectional view a part of another embodiment of an adjustment unit with a connecting element in a first state,

FIG. 7 shows in a schematic sectional view a part of the adjustment unit according to FIG. 6 with the connecting element in a second state,

FIG. 8 shows a further embodiment of an adjustment unit in a schematic perspective view with the connecting element in a first state, and

FIG. 9 shows the part according to FIG. 8 in a second state in a schematic perspective view.

detailed description

FIG. 1 shows, in a sectional view, an electric machine 100 of an internal combustion engine designed as a starter, which has a reciprocating electromagnet 42 designed as a starter relay 42a, also referred to as a switch-on relay. The housing 10 of the electric machine 100 comprises a cylindrical housing part 11 and an outer cover 13 , which are connected to each other by screws, not shown in detail. The cylindrical housing part 11 is closed at the rear by an outer cover 13 , in the middle of which an outwardly directed hub is molded. Located in the hub is a bearing point for the rear end 17 a of the armature shaft 17 of an electric starter motor 18 , the armature of which is indicated by reference numeral 19 . Radially outside the armature 19 , a plurality of (permanent) magnets 20 of the starter motor 18 are located on the wall of the housing part 11 . The front end of the armature shaft 17 is supported with a reduced-diameter end section 22 in a coaxially extending blind hole 23 , not shown in detail, of the output shaft 24 . The other end of the driven shaft 24 is supported in a bearing end shield 25 of the closure housing part 11 and in a hub 26 formed on this bearing end shield. The armature shaft 17 has a toothing 28 (sun gear) near its end close to the end shield 25 , in which a plurality of planetary gears 29 mesh, which are also connected to the outer gears of the planetary gear 31 . The stationary internal gear 30 meshes. The planetary carrier 12 drives the output shaft 24, on which is arranged a freewheel 33, the inner ring 34 of which has a pinion 35 designed as a protrusion, on which external teeth are formed Section 36. The outer ring 37 (also referred to as a driver) of the freewheel mechanism 33 is connected to the driven shaft 24 via a large-pitch thread 38 . A so-called engagement spring 39 acts on the large-pitch thread. By means of the axial movement of the freewheel 33 the external toothing 36 can be brought into engagement with the ring gear 40 of the internal combustion engine for a starting process. This is achieved by means of (switching on) the relay 42, in which the armature 428 (see FIG. 2) deflects the lever 44 via the projection 43 when the current is switched on, and the lever is positioned between the two disks 46. The chute 45 between moves the free wheel mechanism 33 to the left. The lever 44 is designed in the form of a double arm and is arranged pivotably by means of a pin 48 in a bearing 49 which is fixed relative to the housing. The brush plate 53 screwed with the outer cover is tightly attached to the outer cover 13 . The brush plate 53 is constructed in one piece. In particular, a brush holder made of plastic is fastened to the brush plate, in which carbon brushes are arranged, and the carbon brushes are pressed against the commutator arranged at the armature shaft 17 under the action of spring pressure. 63 on. The carbon brushes are connected by means of connecting stranded wires to cable ends which are connected to the contacts 68 of the switching relay 42 . The litz wires are passed through a seal 70 arranged in a bore in the housing part 11 . The brush plate 53 is fastened to the outer cover 13 by means of bolts 62 . Engagement line 110 includes rod 44 which moves outer ring or driver 37 . The driver 37 is part of the freewheel assembly or the freewheel 33 for short.

This type of electric machine 100 designed as a starter is mainly used in motor vehicles and is referred to as a starter, in particular a propeller-screw starter. The main parts include the starter motor 18 configured as an electric motor, the transmission mechanism 31 , and especially the starter relay 42 a , especially a magnetic switch. The starter motor 18 , which is likewise designed as an electric motor, is mechanically operatively connected to the transmission 31 by means of the armature shaft 17 . The transmission 31 is separated from the starter motor 18 by means of a separating element (not shown here), in particular a cover plate or cover plate, adjoining the armature shaft 17 . It is important in this case that the armature shaft 17 is provided with a sealing element which, together with the separating element, forms a rotatably movable seal. The present technical solution thus provides an arrangement in which the transmission 31 is protected against the adhesion of particles or media. During the starting process of the internal combustion engine, starter motor 18 is briefly connected to the internal combustion engine via a gear train via a solenoid switch. Due to the generally high rotational speed of the starter motor 18 and due to the torque required for the starting process, a large transmission ratio is required. The desired transmission ratio is achieved via the pinion 35 on the starter, in particular the starter pinion, and via the pinion of the corresponding flywheel which is larger relative to the starter pinion. The starter pinion is continuously displaceable axially on the armature shaft 17 and is brought into engagement with the toothing of the flywheel via a magnetic switch or electromagnet. The starter motor 18 is then switched on by closing the contact switch, which is part of an electromagnetic switch or push magnet. The starter pinion is assigned a freewheel mechanism 33 , which prevents the starting internal combustion engine from being driven at too high a rotational speed by the still engaged starter pinion of the starter motor 18 and thereby being damaged or destroyed. Such starters usually have a series motor or a permanently excited motor as starter motor 18 . The starter motor 18 is formed from a non-movable part, the stator, and a rotatably mounted part, the rotor. In this case an inner rotor electric machine, the rotor of which defines the inner part of the starter motor 18 and the stator of which defines the outer part of the starter motor. The rotor has a coil with an iron core, which is also called armature 19 and is mounted rotatably in the magnetic field between the pole shoes of the stator. In the starter motor 18 the so-called field windings are replaced by permanent magnets (referred to as permanent magnets). Due to the rapid development of permanent magnets, stator windings can be dispensed with in starters for motor vehicles. The coils, in particular the armature winding, of the armature 19 are driven via the commutator 63 . The commutator 63 provides a conductive connection from the housing 10 to the windings of the armature 19 , for example via two stationary carbon brushes, which are pressed against a roller that rotates with the armature 19 . The surface of the drum is divided into a number of mutually insulated segments. As usual in DC motors, the armature 19 has half the number of windings as the commutator 63 is provided with segments. In this case, each winding is connected at its two ends to two mutually opposite segments. Due to the special requirements for torque and for the flow of current, the cross-section between the segments and the corresponding carbon brushes is particularly wide. In the case of four carbon brushes, two windings can be activated simultaneously, in the case of six carbon brushes, three windings can be activated simultaneously.

The switching relay or starting relay 42 a , which is designed according to the principle of a reciprocating electromagnet, has a fixed relay winding which interacts with a further armature 101 . The other armature 101 is supported axially displaceably and is pressed into the first position by a return spring 102 designed as a helical compression spring in the deactivated state of the switch-on relay 42 a. The switch-on relay 42 a also includes a plurality of wires wound around a common core 423 , which wires form conductor windings 421 , 422 . Conductors or lines have a constant or variable cross section over the entire line length. The iron core 423 is also referred to as a winding body, a coil body or a coil former 423 .

FIG. 2 shows part of switching relay 42 a with regulating unit 400 in a sectional view. The conductor windings 421 and 422 surrounding a coil body 423 are shown in this partial view. The conductor windings 421 , 422 are simultaneously wound around the coil body 423 so that the conductor windings 421 , 422 are arranged next to each other and not stacked on top of each other in layers. A conductor winding is designed as a pull-in or pull-in winding 421 . The other conductor winding is designed as holding winding 422 . The coil former 423 is accommodated in the coil former housing 424 in the assembled state. The bobbin housing 424 is approximately pot-shaped. Correspondingly, the bobbin housing 424 has a rotationally symmetrical wall 425 about the axis A and a bottom 426 which closes off the wall 425 towards one side. For further fixing, the bottom 426 has a plurality of through holes 427, only one of which is shown here. In the exemplary embodiment according to FIG. 2 , through-hole 427 serves as threaded hole 427 a for receiving connecting element 300 (see FIG. 3 ) designed as screw 301 . The adjustment unit 400 is arranged in the axial extension to the through-opening 427 . The adjustment unit 400 protrudes in the axial direction A from an end side 423 a of the coil former 423 which faces the coil former housing 424 . In the exemplary embodiment shown in FIG. 2 , the adjusting unit 400 is designed as a molded part 401 which is formed integrally, ie formed in one piece, with the end side 423 a. In this case, the adjusting unit 400 has at least one flexible region. This flexible region is flexible at least in a direction transverse to the axis of the through-opening 427 , ie transverse to the screw-in direction in the case of a screw connection. The adjusting unit 400 has a receptacle 410 (see FIG. 3 ) for cooperating with a connecting element 300 (see FIG. 3 ), for example a screw 301 , which is used to fasten the bobbin housing 424 or the reciprocating solenoid 42 . Preferably, the molded part 401 and the receptacle 410 are embodied integrally and/or integrally, as shown schematically in FIGS. 2 and 3 . The design of the regulating unit 400 can be implemented as desired. Some embodiments are shown in the figures below.

FIG. 3 shows in a schematic sectional view a part of switching relay 42 a with an adjusting unit 400 of a first embodiment having connecting element 300 in a first state. The bobbin 423 carries the conductor windings 421 , 422 forming the coil. These conductor windings are delimited on the end side by the end side 423 a of the coil former 423 . On the side facing away from the conductor windings 421 , 422 , the adjustment unit 400 protrudes in the axial direction A from the end side 423 a integrally formed with the end side 423 a. The adjusting unit 400 is designed as a molded part 401 with undrilled blind holes or blind holes 402 for short, so that the adjusting unit 400 is configured in the shape of a pot or as a receptacle 410 . The walls of the adjustment unit 400 are designed thin-walled so that they are flexible. The blind hole 402 cooperates complementary to the connecting element 300 configured as a threaded screw 301 . For clarity, the through hole 427 is not shown here. The threaded bolt 301 engages here with the internal thread of the blind hole 402 .

FIG. 4 shows the adjusting unit 400 according to FIG. 3 with the connecting element 300 in a second state in a schematic sectional view. In the state shown here, the thread of the threaded screw 301 is designed as a self-tapping thread, which leads to a corresponding material extrusion of the adjusting unit 400 . In this case, the outer wall yields when the thread is tapped, so that the outer wall of the molding 401 has a shoulder.

FIG. 5 shows a further embodiment of an adjustment unit 400 in a schematic perspective view. The adjusting unit 400 configured as a molded part 401 is here configured cylindrically. In this case, the molded part 401 consists of two parts, ie has two semi-cylindrical shapes 403 which are separated from one another in the circumferential direction by two gaps 404 .

FIG. 6 shows in a schematic sectional view part of another embodiment of an adjusting unit 400 with the connecting element 300 in a first state. The molded part 401 is designed here as a funnel-shaped wall or funnel 405 for short. The funnel is slightly open in the direction of the connecting element 300 so that the connecting element can be guided along the funnel 405 .

FIG. 7 shows in a schematic sectional view that part of the adjusting unit 400 according to FIG. 6 with the connecting element 300 in a second state. In this state, the connection element 300 contacts the inside of the funnel 405, whereby the funnel is pressed outwards. In the assembled state, the bobbin 423 is fixed both axially and radially by the cooperation of the funnel 405 and the threaded bolt 301 .

FIG. 8 shows a further embodiment of an adjusting unit 400 in a schematic perspective view, with the connecting element 300 in a first state. The adjustment unit 400 is here formed by an axially protruding web 406 . The web 406 protrudes from an end side 423a, which is not shown for the sake of clarity. At their ends facing away from the end side 423 , the connecting plates 406 are connected to one another along a circumference by means of ring elements 407 . The connecting element 300 serves to contact the ring element 407 . Correspondingly, the size of the ring element 407 and the size of the connection element 301 cooperate with each other. When the threaded bolt 301 is screwed in axially, precisely in the direction of screwing in, the tip of the threaded bolt 301 contacts the ring element 407 serving as a stop surface. The webs 406 , which are spaced apart in the circumferential direction by gaps 404 , are designed to be flexible, preferably elastic, so that they yield under the force of the threaded bolts 301 , as shown in FIG. 9 .

FIG. 9 shows the part according to FIG. 8 in a second state in a schematic perspective view. In this state, the threaded bolt 301 is pressed onto the ring element 407 and the connecting plate 406 yields accordingly. This is accomplished by deformation of the web 406, which is bent outward as shown. As a result, the axial distance of the stop surface from the end side 423a is changed, whereby the coil former 423 is fixed in the axial direction.

Claims (10)

1. A reciprocating electromagnet (42), said reciprocating electromagnet comprising at least one coil former (423) and a coil former housing (424) at least partially containing said coil former (423), said coil former housing The body has at least one through hole (427) for fixing the reciprocating electromagnet (42), wherein, in order to adjust at least in the axial direction, axially between the coil former (423) and the coil former housing (424 ) is provided with an adjustment unit (400), characterized in that the adjustment unit (400) is arranged in the axial extension of the through hole (427), and the adjustment unit (400) has at least a lateral A flexible area in the direction of the axis of the through hole (427). 2. The reciprocating electromagnet (42) according to claim 1, characterized in that, the adjustment unit (400) is at the bottom (426) of the coil frame (423) pointing to the coil frame housing (424). ) on the end side (423a) of the molding (401). 3. The reciprocating electromagnet (42) according to claim 1 or 2, characterized in that the adjustment unit (400) has at least one receptacle (410) for extending through the through hole (427) out of the connecting element (300). 4. Reciprocating electromagnet (42) according to claim 1 or 2, characterized in that the adjusting unit (400) has an end region diverging in the direction of the bottom (426). 5. The reciprocating electromagnet (42) according to claim 1 or 2, characterized in that the adjustment unit (400) is configured in the manner of a blind hole (402). 6. The reciprocating electromagnet (42) according to the previous claim 1 or 2, characterized in that the adjustment unit (400) has at least one gap (404), so that the adjustment unit (400) is shaped as an expansion bolt form. 7. The reciprocating electromagnet (42) according to claim 2, characterized in that, the adjustment unit (400) has a plurality of passing slots (404) protruding from the end side (423a) along the circumferential direction Spaced apart, flexible webs (406), wherein at least two web ends are connected by stop elements connecting the web ends. 8. An electric machine (100) comprising at least one relay, characterized in that the relay comprises at least one reciprocating electromagnet (42) according to any one of claims 1-7. 9. A method for manufacturing and/or assembling a reciprocating electromagnet (42), in which method a bobbin (423) is at least partially housed in a bobbin housing (424), and the bobbin The housing (424) is provided for further fixing by means of a connecting element (300) protruding through the corresponding through hole (427) in the direction of the coil carrier (423), wherein, for adjustment at least in the axial direction, the An adjustment unit (400) is provided between the coil frame (423) and the coil frame housing (424), and it is characterized in that the adjustment unit (400) is arranged on the axis to the through hole (427) In the extension, the adjustment unit (400) has a region that is flexible at least in a direction transverse to the axis of the through hole (427). 10. The method according to claim 9, characterized in that the reciprocating electromagnet (42) is a reciprocating electromagnet (42) suitable for a relay of the electric machine (100) according to claim 8.