DE102022117419A1 - Rotation angle sensor, sensor construction kit and method for producing a rotation angle sensor - Google Patents

Abstract

In order to be able to produce rotation angle sensors (1) more cheaply and in particular to dispense with the damage-intensive flex conductor connections (16) between the plug connector (8) and the electronic board (6) and between the several board parts (6.1, 6.2). can, it is known to use connectors (8), the soldering pin (8b) of which is inserted into the solder openings of the circuit boards (6) during the automatic assembly of the circuit boards (6) and with this directly and in a fixed geometric association with the Main circuit board (6.1) can be soldered directly, in particular by resting the circuit board (6) on, in particular lockable, positioning pins (8b3) of the connector (8). According to the invention, the front base (4a) consists of the slim, cup-shaped Protective sleeve (4) made of, in particular non-magnetizable, metal and is in particular made in one piece together with the rest of the protective sleeve (4), the protective sleeve (4) having at least one positive, external anti-twist element (40) for mounting in the correct rotational position on a component (50) carrying the rotation angle sensor (1).

Description

I. Area of application

The invention relates to rotation angle sensors that work without contact, in particular by detecting a magnetic field, and which detect the position, in particular rotational position, of a transmitter element, in particular transmitter magnets. Such rotation angle sensors - which, depending on the intended use, can only detect up to 360° or over several revolutions - are needed wherever the rotational position of rotating components needs to be monitored and / or controlled.

II. Technical background

Depending on the available installation space for the rotational position sensor, the housing shape is more disc-shaped or more pin-shaped, with the sensor element, which selects the rotational position of the component to be monitored, having the pin shape - which is the sole focus of the present invention - is arranged close to one of the end faces of the pin-shaped, usually cylindrical, housing and this end face must also be arranged as close as possible to the encoder element - but not touching it. A Hall element is often used as a sensor element.

In a known design, the rotation angle sensor comprises a protective unit in the form of a slim, cup-shaped protective sleeve with only one open end face, which usually consists of a stable material, and a sensor unit located therein.

The sensor unit consists, on the one hand, of the sensor element such as the Hall element and an electronic evaluation circuit, with both the sensor element and the electronic components of the evaluation circuit being mounted on the at least one electronic board and electrically are operatively connected to each other, as is a plug connector, which is also electrically connected to the evaluation circuit in order to forward the signals it supplies to the outside.

For this purpose, the connector sits in the open end face of the protective sleeve and closes it tightly, and is electrically conductively connected to one end of a main board running in the longitudinal direction of the protective sleeve, while the sensor element is arranged in the opposite end region of the main board .

For manufacturing reasons, in addition to the main board, there is a front, sensor-side cross board and a rear, plug-side cross board, of which the sensor element is located on the former and the latter is soldered to the soldering pins of the connector is.

Each of the two cross-boards is positively attached to one of the ends of the main board and electrically connected to it via a flex board, i.e. flexible electrical conductor tracks.

The main reason for the presence of the rear cross-board is that the soldering pins protrude backwards in the axial direction from the connector and in the direction of these soldering pins transversely to the board level onto the corresponding soldering pads or in through holes have to be brought closer to the board and plugged in for soldering, which, however, is hardly possible with assembly machines. This means that the connected transverse board is transverse to the axial direction and must be mechanically connected to the main board running in the axial direction.

Because of two such connections between the cross-board and the main board, this results in a not very stable overall unit, which is usually cast and protected using a hardening casting compound, but must be handled carefully until the casting compound has hardened, as it is mainly caused by relative - Twisting of the individual components relative to each other around the axial direction can easily cause damage.

Another problem area is the correct positioning of the rotation angle sensor in a component that accommodates it, e.g. a machine, in such a way that the sensor element located therein is in the intended target position, whereby on the one hand it is about the correct axial positioning of the sensor Element goes along the axial direction of the rotation angle sensor and on the other hand around the rotational position with respect to this axial direction.

For this purpose, it is already known to provide internal, form-fitting, anti-twist elements between the plug socket on the one hand and the protective sleeve on the other, so that after assembly of the rotation angle sensor, both the axial position and the rotational position of the sensor element with respect to the outer protective sleeve are known and corresponds to the intended target position.

The target position of the rotation angle sensor relative to the load-bearing component has so far only been set during its assembly so that the pin-shaped sensor has an external thread on its outer circumference and is inserted into a through opening in a wall as a load-bearing component, for example, and with it placed on both sides of the wall , screwed-on nuts that mesh with the external thread were fixed in a desired axial and rotational position.

However, the internal anti-rotation element used for the rotational position can only be used if it is visible from the outside, which in turn poses a risk of damage and often cannot be used because the fitter uses that end when installing the rotation angle sensor of the rotation angle sensor on which this internal anti-rotation element is located.

III. Presentation of the invention

a) Technical task

It is therefore the object according to the invention to develop a generic angle of rotation sensor in such a way that the disadvantages described are minimized and to provide a corresponding sensor modular system with which different angle of rotation sensors can be assembled from just a few different modular elements .

Furthermore, a method for the simple and safe, reproducible production of rotation angle sensors should be made available.

b) Solution to the task

This task is solved by the features of claims 1, 15 and 16. Advantageous embodiments result from the subclaims.

With regard to the rotation angle sensor, the task is solved in that the bottom of the pin-shaped, slim, cup-shaped protective sleeve is made of metal, in particular non-magnetizable metal such as stainless steel, which results in an optimal protective effect.

This protective sleeve is preferably made in one piece and/or there is an external thread on the outer circumference for screwing to a component carrying the rotation angle sensor.

The plug connector is preferably arranged in parallel or on the main plane of the main board with its axial direction, which is determined by the main extension direction of its outward-facing contact pins or contact sockets onto which a plug can be plugged.

The term main board is understood to mean the electronic board inside the protective sleeve that extends along its greatest longitudinal extent, i.e. the axial direction, of this slim, cup-shaped protective sleeve.

According to the invention, the connector is soldered directly to this main board by means of the soldering pins that extend inwards, i.e. into the inside of the protective sleeve when assembled, and not, as in the prior art, to a cross board, which is then only electrically conductive and mechanical connected to the main board.

This makes the connection between the connector and the main board much more stable and reproducible.

There is preferably an anti-twist protection between the plug connector and the protective sleeve in order to avoid their relative rotation with respect to the axial direction of the protective sleeve. For this purpose, there is a so-called internal anti-twist element on both of them, which interacts in a form-fitting manner when installed.

Such an internal anti-twist element is very useful in order to know the rotational position of the sensor element of the sensor unit relative to the protective sleeve about its axial direction, regardless of whether the sensor unit is cast in the protective sleeve or before insertion is cast separately into the protective sleeve as a casting body with the sensor unit in it or no casting takes place at all.

Preferably, a so-called external anti-rotation element - which preferably has a form-fitting effect - is formed on the protective sleeve, in particular on its outer circumference, in order to be able to interact with a corresponding anti-rotation counter-element, which is formed on the supporting component.

Preferably, a receiving opening is formed in this for receiving on the supporting component, preferably a receiving through-opening in the case of a plate-shaped supporting component, and the external anti-rotation element and the external anti-rotation counter-element interact in a form-fitting manner in such a way that the rotation angle sensor preferably can only be inserted into this receiving opening in a rotational position about its longitudinal axis and / or only with the sleeve base of the protective sleeve in front.

As a result, the rotational position of the sensor element is not only relative to the protective sleeve, but also then also known and fixed relative to the supporting component.

For this purpose, the anti-twist element on the protective sleeve is preferably designed as a negative anti-twist element, which means that it can be produced on the protective sleeve that does not yet contain an anti-twist element by removing material, i.e. usually a recess, for example in the form of a Groove or hole in the outside, in particular the outer circumference, is the protective sleeve.

This makes it easier to produce the rotation angle sensor, because material removal can be carried out later more easily than material application, i.e. a positive twisted protective element.

Such, in particular negative, anti-twist element, for example in the form of a groove, preferably extends over more than 50%, better than 70%, better than 90% or in particular over the entire axial length of the protective sleeve. This means that this external anti-twist element is always effective regardless of how deep the rotation angle sensor is inserted into the receiving opening.

In order to simplify production, only one, in particular negative, anti-twist element is present on the outside of the protective sleeve, in particular in the form of a trough-shaped recess which runs in the axial direction in the outer circumference.

A single anti-twist element is sufficient, for example in that the cross-sectional shape of this trough-shaped recess is asymmetrical, for example the inclinations of its two flanks are not symmetrical to the longitudinal center plane of the cross-section of the trough shape.

This ensures with a single anti-twist element that - provided there is a corresponding, shaped anti-twist counter element - the rotation angle sensor only enters such a receiving opening in a certain rotational position and only in the correct direction, with the ground first can be inserted.

Alternatively, several, in particular negative, anti-rotation elements can be present distributed over the circumference, also in the form of trough-shaped recesses running in the axial direction, which then preferably differ either in their cross-sectional shape in such a way that the protective sleeve and thus the entire rotation angle sensor can only be inserted in one insertion direction into a receiving passage opening equipped with a matching anti-rotation counter element.

As an alternative to the different cross-sectional shapes, the plurality of anti-rotation elements can be arranged in terms of their rotational position about the longitudinal direction of the protective sleeve in such a way that insertion is also only possible in one insertion direction. For this purpose, if there are only two anti-twist elements in the form of axially extending channels, they should have an intermediate angle of less than 180°.

The insertion direction is understood to mean from which side a receiving passage opening is inserted and/or whether it is inserted with the bottom of the protective sleeve first or with the plug socket first.

In this way, errors should be reliably avoided both in the production of the rotation angle sensor and in its assembly on the supporting component.

As explained above, the production of a projection, i.e. a positive element, is fundamentally more difficult to carry out than the production of a negative element in the form of a recess or, in particular, a hole.

Therefore, in the case of a negative anti-twist element on the outside of the protective sleeve, a positive anti-twist counter-element on the receiving component would be necessary, for example in the case of a through opening, a nose protruding radially inwards from it, which in terms of production technology is the case with a thick one that has already been fully assembled on a machine and in particular Welded wall part as a receiving component can cause problems or is no longer possible afterwards.

In these cases, it can make sense to provide a separate anti-twist part, which is installed in particular functionally between the rotation angle sensor and the supporting component and has positive anti-twist elements, so that both on the rotation angle sensor, in particular its protective sleeve, as well in the load-bearing component, in particular its receiving opening, only needs negative anti-twist elements that are produced by material removal.

It goes without saying that such a negative anti-twist element should not penetrate the wall of the protective sleeve in order not to disrupt its tightness.

Such a separate anti-twist part can in particular be a punched or laser-cut and, if necessary, in particular additionally, bent sheet metal part.

Preferably, the separate anti-rotation part, which is intended to interact positively with both the protective sleeve and the receiving part and in particular its receiving opening in the assembled state, only has positive anti-rotation elements.

The separate anti-rotation part preferably has a through opening for inserting and partially pushing through the protective sleeve of the rotation angle sensor, and from this inner circumference of the anti-rotation part a positive anti-rotation element projects radially inwards, which extends into the negative anti-rotation element, for example the channel-shaped recess fits positively into the protective sleeve.

A positive anti-rotation element on the anti-rotation part that interacts with the receiving part could be a positive anti-rotation element that projects radially or axially in the outer peripheral region of the anti-rotation part.

For example, a positive anti-rotation element that is present radially outside the through opening and points in the axial direction and is therefore bent out of the main plane of the sheet metal could engage in a recess which is present in, for example, a plate-shaped receiving component away from its through opening for the protective sleeve of the rotation angle sensor and how the receiving opening, in particular the receiving through-opening, can be made by simply drilling, even immediately before installing the rotation angle sensor, i.e. on a fully assembled machine, which reduces the effort for additional work on the machine for installing the rotation angle -Sensors greatly reduced.

If the angle of rotation sensor is to be partially pushed through a receiving passage opening of a wall-like load-bearing component and fixed there, it is usually important that the angle of rotation sensor also protrudes a certain axial distance with its bottom surface in front of this load-bearing wall, in order to maintain the correct axial distance to a sensor element that is present there and rotates during operation of the machine, in particular a sensor magnet, for a satisfactory function of the rotation angle sensor, since its sensor element only has a limited range for measuring .

As a rule, the manufacturer of the rotation angle sensor only specifies this target distance between the bottom end face of the protective sleeve of the rotation angle sensor and the encoder element, and when installed on the load-bearing component, the rotation angle sensor must be axially displaced and positioned to this extent It must then be determined that this target distance is achieved - within certain tolerance limits.

However, if a user of the rotation angle sensor always needs it on the same supporting component and always in the same axial and/or rotational position positioning in a variety of assembly cases, it may make sense - especially in addition to fixing the rotational position using a separate one Anti-rotation part - an axial stop must also be provided, which enables the rotation angle sensor to be in the correct axial position relative to the supporting component quickly and reliably.

For this purpose, a separate axial stop part can be used on the outside of the angle of rotation sensor, i.e. in particular its protective sleeve, for this application, which can only be positively attached to the angle of rotation sensor in a certain axial position, for example can be pushed onto the angle of rotation sensor transversely to the axial direction.

This can, for example, be a punched or laser-cut, possibly additionally bent, sheet metal part, like the separate external anti-twist part.

The axial stop part is therefore preferably a sheet metal part with a U-shape formed in its main plane.

The sliding in only one axial position can be achieved by a flattening or depression being arranged in the outer circumference of the protective sleeve at one, preferably only one, axial position on one or two sides opposite the axial direction or more circumferentially as an annular groove, so that at this point the Cross section of the protective sleeve is reduced so that the U-shaped axial stop part can be pushed on transversely, but not axially away from this flattening or recess. Also, after being pushed on in the transverse direction, it cannot be moved in the axial direction along the protective sleeve.

It should be clear that the above-described negative anti-twist elements as well as the flattening or recess mentioned here for the axial stop part should preferably not penetrate the wall thickness of the protective sleeve, i.e. the tightness of the pot shape of the protective sleeve, which is only open at the front, is particularly maintained.

If an axial stop part is required, the axial stop part and a separate anti-rotation part are preferably functionally combined by additionally providing positive anti-rotation elements on an axial stop part as described above are formed, which, as described above, interact with negative anti-rotation elements on the one hand on the protective sleeve and on the other hand on the supporting component.

However, it must then be ensured by appropriate design of the flat or recess on the protective sleeve that the axial stop part can only be pushed onto the protective sleeve in a single defined transverse direction and, in particular, only locks relative to it in a single rotational position about the axial direction

Then, for example, only the axial stop part has to be pushed transversely onto the protective sleeve and preferably locked there in order to then simply insert the rotation angle sensor equipped with it into the corresponding receiving opening until it rests on the axial stop part in such a rotational position that the positive anti-twist protection -Elements on the axial stop part interact with the corresponding negative anti-rotation counter elements on the sensor-carrying component.

In this way, a sensor kit can be created which has at least one type of protective sleeves, preferably several types of differently designed protective sleeves, as well as several types of differently designed, separate anti-twist parts and/or axial stop parts, each of which is as follows are formed as described.

This means that the correct rotation angle sensor can be provided to the customer for a variety of different applications, i.e. with a protective sleeve with, for example, the correct external anti-rotation element, together with the anti-rotation part or axial stop part that is suitable for the respective application.

One advantage here is that several differently designed anti-twist parts or axial stop parts, which are manufactured in particular as lasered sheet metal parts or bent sheet metal parts, can be produced without any complex upfront effort for a punching die or the like, making it an economical solution even for smaller quantities represent.

In order to be able to automatically equip the electronic board with the plug connector, the soldering pins protruding from the housing of the plug connector extend out of the housing in the axial direction, but their free end is bent approximately at a right angle to it.

This means that the connector, which is already in the correct angular position relative to the main board, can be inserted with the free end areas of its soldering pins into the soldering passages on the board.

If the connector further has at least one positioning pin, which is spaced in the transverse direction from the soldering pins and is designed with an offset in the end region opposite to the offset of the soldering pins and this is positioned so that when moving transversely to the main plane of the electronics board is locked behind it, the connector is held reliably and in the correct position on the main board until the connector is soldered to the board.

This means that the connector can also be connected to the motherboard using an assembly machine by grabbing it like the other electronic components and moving it transversely to the main plane of the motherboard until it is contacted and soldered.

With regard to the method for producing a rotation angle sensor, in particular a rotation angle sensor as described above, this task is solved by inserting the sensor unit into the open end face of the protective sleeve while the bottom of the cup-shaped protective sleeve is already closed, in particular because of One-piece production of the protective sleeve together with its base.

This results in a very stable design of the protective sleeve,

Since the sensor unit, in particular inside the protection unit, is usually to be cast with a hardening casting compound, the required amount of casting compound is either only filled into the protection unit while the sensor unit is being pushed in or is there Part of the quantity is already in the protective sleeve before insertion, so that in particular the cross-board located at the front end of the main board must be immersed in the potting material already present at the bottom of the protective sleeve.

In this case, the cross-board is designed in such a way that it does not completely fill the free inner cross-section of the protective sleeve, so that the potting compound present at the bottom of the protective sleeve can flow past the cross-board, in particular on two sides opposite the main board without tilting the cross board relative to the main board.

Preferably, when producing the rotation angle sensor, a form-fitting with the Anti-twist part and/or an axial stop part which interacts with adjacent components, preferably as sheet metal parts, which are cut out of a sheet metal plate in particular by means of laser cutting - also punched out if a larger number of pieces are required - and, if necessary, then bent.

To attach the connector to the electronics board, it is pressed transversely to the main plane of the electronics board with the bent free ends of its soldering pins first into the solder openings provided on the board and the at least one positioning pin that is guided past the board is pressed. The pin is locked behind the electronic board so that it is no longer possible to move the connector and board apart in the opposite direction.

This ensures a stable connection until the two parts are soldered together.

c) Embodiments

• 1a - c: eine Sensor-Einheit nach dem Stand der Technik für einen stiftförmigen Drehwinkel-Sensor in verschiedenen Ansichten und Montage-Zuständen,
• 2a, b: einen bekannten, fertigen Drehwinkel-Sensor einer 1. Bauform im Teilschnitt und im vollständigen Längsschnitt,
• 2c, d: einen bekannten, fertigen Drehwinkel-Sensor einer 2. Bauform beim Zusammenbau von Sensor-Einheit und Schutz-Einheit,
• 3a: einen erfindungsgemäßen Drehwinkel-Sensor einer 1. Bauform in Seitenansicht mit Teilschnitt,
• 3b, c: abgewandelte Querschnitte durch den Drehwinkel-Sensor dieser 1. Bauform,
• 4a - c: einen erfindungsgemäßen Drehwinkel-Sensor einer 2. Bauform in Seitenansicht mit Teilschnitt sowie weiteren Querschnitten,
• 5a - d: einen erfindungsgemäßen Drehwinkel-Sensor einer 3. Bauform in Seitenansicht mit Teilschnitt sowie weiteren Querschnitten,
• 6a, b: einen erfindungsgemäßen Drehwinkel-Sensor einer 4. Bauform in Seitenansicht mit Teilschnitt sowie weiteren Querschnitten,
• 7a - c: eine erfindungsgemäße Sensor-Einheit in verschiedenen Fertigung-Stadien und Ansichten.

Embodiments according to the invention are described in more detail below by way of example. Show it:

• 1a - c : a sensor unit according to the prior art for a pin-shaped rotation angle sensor in different views and assembly states,
• 2a, b : a known, finished rotation angle sensor of a 1st design in partial section and in complete longitudinal section,
• 2c, d : a known, finished rotation angle sensor of a second design when assembling the sensor unit and protection unit,
• 3a : a rotation angle sensor according to the invention of a 1st design in side view with partial section,
• 3b, c : modified cross sections through the rotation angle sensor of this 1st design,
• 4a - c : a rotation angle sensor according to the invention of a second design in a side view with a partial section and further cross sections,
• 5a - d : a rotation angle sensor according to the invention of a 3rd design in side view with partial section and further cross sections,
• 6a, b : a rotation angle sensor according to the invention of a 4th design in side view with partial section and further cross sections,
• 7a - c : a sensor unit according to the invention in various production stages and views.

The 2a until 2d show two different designs of a known pin-shaped rotation angle sensor 1, consisting of protection unit 2 and sensor unit 3, of which the sensor unit 3 is in the 1a until 1c in different stages of production.

The electronic board 6 with the plug socket 8 soldered to it - which was inserted into a cup-shaped, approximately cylindrical protective sleeve 4 that is open on one end face to complete the rotation angle sensor, as in the 2a until 2c shown - consists of a total of three partial boards 6.1 to 6.3, of which the main board 6.1 is aligned with its longitudinal direction 10, i.e. the direction of its greatest extent, when installed with the longitudinal direction 4 ', the greatest extent direction of the protective sleeve 4, and which is overall the longitudinal direction 1 'of the pin-shaped rotation angle sensor 1.

The reason for the division into three sub-boards 6.1 to 6.3 was, on the one hand, the fact that the plate-shaped sensor element 5, usually a Hall sensor, is in the installed state with its main plane - i.e. the plane of its largest two-dimensional extent - had to be positioned parallel and close to the bottom 4a of the protective sleeve 4, as in 2 B shown.

Since the narrow side of the main board 6.1 is not suitable for this, the sensor element 5 is mounted on a cross board 6.3. In the 2 B The electronic components 7 of the evaluation circuit for the signals from the sensor element 5 shown are mounted on the main board 6.1. Applied means that the corresponding components are soldered to corresponding soldering points on the boards 6.1, 6.3 provided with electrically conductive conductor tracks and soldering points, so that an electronic circuit is created.

The transverse board 6.2 was necessary because the soldering pins 8b arose from the plug socket 8, which is used to plug in a plug, on its back, i.e. towards the board 6, in the longitudinal direction 8 'of the plug socket 8 and ran straight ended straight, i.e. were not cranked. The axial direction or longitudinal direction 8 'of the plug socket 8 is understood to be the direction in which contact pins 8a arranged in the recessed interior of the plug socket 8, which are accessible from the outside, run for inserting a plug.

Since the axial direction 8 'of the plug socket 8 must match the longitudinal direction 4' for insertion into the protective sleeve 4, the plug socket 8 was connected to its soldering pin th 8b soldered on a separate partial board 6.2, as in 1a shown.

For cutting and equipping with components, the three partial boards 6.1 to 6.3 are still located with their main planes in the same plane, and are electrically connected to one another via so-called flex boards 16, which is a plastic film with electrically conductive conductor tracks applied to it which are electrically conductively connected in their two end regions to the conductor tracks of one of the sub-boards 6.1 and/or 6.2 and/or 6.3.

• Die Quer-Platine 6.2 weist an ihren - im Ausgangszustand der 1a fluchtend zur Haupt-Platine 6.1 liegenden - Außenkanten nach außen offene Ausnehmungen 6.2a auf, während die Haupt-Platine 6.1 in ihrer Quer-Platine 6.2 hinweisenden Endbereich an jedem ihrer Längsseiten in Richtung Quer-Platine 6.2 weisende Vorsprünge 6.1 a aufweist. Da die Breite der Ausnehmung 6.2a etwa der Dicke der Haupt-Platine 6.1 entspricht und die Länge der Vorsprünge 6.1 a etwa der Dicke der Quer-Platine 6.2, können die Vorsprünge 6.1 a in die Ausnehmungen 6.2a passgenau und möglichst spielfrei so eingesteckt werden, dass sich die bereits an der Quer-Platine 6.2 verlötete Stecker-Buchse 8 auf der von der Haupt-Platine 6.1 wegweisenden Seite der Quer-Platine 6.2 befindet.

In order to bring the transverse boards 6.2, 6.3 into a position transversely, in particular perpendicular, to the longitudinal direction 10 of the main board 6.1 and to mechanically fix them in this position, these partial boards 6.1 to 6.3 are connected to one another in a form-fitting manner:

• The cross board 6.2 points to its - in the initial state 1a aligned with the main board 6.1 - outer edges have outwardly open recesses 6.2a, while the main board 6.1 has projections 6.1a pointing in the direction of the transverse board 6.2 in its end region on each of its long sides in the direction of the transverse board 6.2. Since the width of the recess 6.2a corresponds approximately to the thickness of the main board 6.1 and the length of the projections 6.1a approximately corresponds to the thickness of the cross board 6.2, the projections 6.1a can be inserted into the recesses 6.2a with a precise fit and with as little play as possible, that the plug socket 8 already soldered to the cross-board 6.2 is located on the side of the cross-board 6.2 facing away from the main board 6.1.

In an analogous manner, there are projections 6.1b on the main board 1 in its end region towards the cross board 6.3, and in this there are recesses 6.3a, so that this cross board 6.3 can also be plugged onto this end region of the main board 6.1 in a form-fitting manner can that the sensor element 5 is located on the side of the cross board 6.3 facing away from the main board 6.1.

The partial boards 6.1 to 6.3 remain connected to one another in an electrically conductive manner via the flexible flex boards 16

• Entweder wird gemäß 2c die Sensor-Einheit 3 von der offenen Stirnseite aus in Längsrichtung 4' der Schutzhülse 4 mit dem Sensor-Element 5 voraus in die Schutzhülse 4 eingesteckt und dabei - gleichzeitig oder auch anschließend - mit noch flüssiger und fließfähiger Vergussmasse VM vergossen, die von der offenen Stirnseite her in die Schutzhülse 4 eingefüllt wird, wodurch im Wesentlichen die gesamten Freiräume zwischen Schutzhülse 4 und eingesteckter Sensor-Einheit 3 ausgefüllt werden.

In this pre-fixed state, the sensor unit 3 is stabilized by surrounding it with a hardening casting compound VM:

• Either will be according to 2c the sensor unit 3 is inserted into the protective sleeve 4 from the open end face in the longitudinal direction 4 'of the protective sleeve 4 with the sensor element 5 in advance and - at the same time or afterwards - poured with still liquid and flowable casting compound VM, which comes from the open The end face is filled into the protective sleeve 4, whereby essentially the entire free space between the protective sleeve 4 and the inserted sensor unit 3 is filled.

Since this extensive filling can cause problems with strong temperature fluctuations, the sensor unit 3 can also be cast with casting compound outside the protective sleeve 4 in a separate mold, so that after hardening it forms a casting body VK around the sensor unit 3, which is preferably around the axial direction, the longitudinal direction 10 of the sensor unit 3, has circumferential spacer webs 17 protruding around it, which are dimensioned so that the casting body VK - after inserting the casting body VK together with the sensor unit 3 accommodated therein - into the protective sleeve 4 according to 2a, b - rests on the inner circumference of the protective sleeve 4, so that different, mostly temperature-related, expansions - especially in the radial direction - of the protective sleeve 4 on the one hand and of the casting body VK on the other hand can be compensated for more easily.

The casting body VK encloses in 2 B only the cross-board 6.3 with the sensor element 5 on it and most of the main board 6.1, but it can also extend further towards the plug socket 8 and also enclose the cross-board 6.2 there.

How best 2 B shows, the plug socket 8 has at its rear end facing away from the circuit board 6 an outwardly projecting collar 8c, which serves as a longitudinal stop when inserted into the protective sleeve 4 and, in the assembled state, rests on its free annular end face.

Furthermore shows 2c that an internal anti-twist protection with regard to rotation about the longitudinal direction 10 or 1 'was already used in the form of an internal anti-twist element 9a, which protrudes outwards from the base body of the plug socket 8 at a point on the circumference and from the collar 8c extends out in the direction of boards 6.2, 6.1 and fits into an anti-rotation counter-element 9b in the form of a groove, which was made in the wall of the protective sleeve 4 running in the longitudinal direction 4.1 and ended in the annular, freely ending end face of the protective sleeve 4.

3a shows a side view of a fully assembled rotating diaper sensor 1, which in order to fulfill its function must be mounted on a supporting component 50 in such a way that its closed, Front base 4a must be mounted at a predetermined distance A from a magnet M, since the rotation angle sensor 1 detects the direction of its magnetic field with its sensor element 5, for which the pole direction from the north pole N to the south pole S of the magnet M in the transverse direction, preferably lies in a plane exactly perpendicular to the longitudinal direction 1 'of the rotation angle sensor 1 or rotates in it, because the magnet M is arranged on a supporting component - not shown - whose rotation and in particular rotational position is to be detected.

For this, however, the rotational position of the sensor element 5 about this longitudinal direction 1 'is also of interest, in particular in order not to require calibration with respect to the magnet M to determine an initial rotational position, the zero position.

As in e.g 3a shown, the rotation angle sensor 1 is mounted on a supporting component 50, which is usually a plate-shaped component, in which it is inserted into a through opening 51 of this receiving component 50 in the axial direction 1 'and fixed in a certain axial position to this component 50 By screwing a nut 18, 19 on both sides onto the external thread 20 of the protective sleeve 4 from one side of the receiving component 50, the distance A can be set precisely, but the rotational position of the sensor element 5 in the rotation angle sensor 1 is still the same not known before.

This is provided according to the invention by an additional external anti-rotation element 15 in the outer circumference of the protective sleeve 4, which, for example, marks the zero position of the sensor element 5 relative to the protective sleeve 4.

In the present case the 3a is the external anti-twist element 15 a negative anti-twist element, i.e. an element that can be produced by material removal, namely in the form of a groove which runs in the longitudinal direction 1 along preferably the entire length of the protective sleeve 4 in its outer surface, in particular its outer lateral surface, but whose wall thickness does not penetrate.

If according to the cross-sectional representations of the 3b or 3c the component 50 carrying the sensor has a positive, from its through opening 51 - which usually has a round cross section so that it can be produced by simple drilling - a radially inwardly projecting anti-rotation counter element 52 which fits into the groove 15, or several such anti-rotation counter elements, the protective sleeve 4 and thus the entire rotation angle sensor 1 is fixed in its rotational position about the longitudinal direction 1 'in a form-fitting manner relative to the supporting component 50, provided that the rotation angle sensor 1 is pushed into the through opening 51 of the component 50 only in a rotational position and in an insertion direction 10A - according to 3a from top to bottom, and with the closed bottom 4a of the protective sleeve 4 ahead through the through opening 51 - is guaranteed.

• Gemäß 3c sind an verschiedenen Umfangsstellen des Innenumfanges der Durchgangsöffnung 51 zwei verschiedene Verdrehschutz-Gegenelemente 52 angeordnet und zwar unsymmetrisch verteilt über den Umfang, hier mit nur zwei Verdrehschutz-Gegenelementen 52 um etwa 90° zueinander versetzt.

This can be achieved in different ways:

• According to 3c Two different anti-rotation counter-elements 52 are arranged at different circumferential points of the inner circumference of the through opening 51, asymmetrically distributed over the circumference, here with only two anti-rotation counter-elements 52 offset from one another by approximately 90 °.

If the two counter-elements 52 were the same size in cross-section and also the two receiving, negative anti-rotation elements 15.1 and 15.2 in the outer circumference of the protective sleeve 4, the rotation angle sensor 1 could only be in one rotational position in each of the two possible insertion directions insert, but also in the insertion direction from bottom to top, which is not intended here and is incorrect - since the encoder magnet M is located below the receiving component 50 in this case.

The latter can be avoided by the two counter-elements 52 and also the matching external anti-rotation elements 15.1, 15.2 of the sensor 1 having a different cross section, so that the sensor 1 only in one of the two possible insertion directions, namely the insertion direction 10A with the base 4a first from top to bottom - can be inserted through the through opening 51, since when inserted from bottom to top the larger of the two positive counter-elements 52 would hit the smaller of the two negative anti-rotation elements 15.1 and would not be inserted into it could.

The whole thing can be done according to 3a, b can also be solved with just one element on the circumference, in that both the anti-rotation counter-element 52 and the anti-rotation element 15, which should fit with a close tolerance, have an asymmetrical cross section, in this case one that is asymmetrical to the longitudinal center plane 15 "along the groove 15 Cross-section.

Since the cross-sectional shape of the counter element 52 is only qualitatively similar to the cross-sectional shape of the anti-rotation element 15 when inserted in the correct insertion direction 10A - here from above If the outer circumference of the protective sleeve 4 fits, inserting it in the wrong insertion direction is not possible.

Theoretically, the anti-rotation element on the outer circumference of the protective sleeve 4 can also be a positive, i.e. radially protruding, element and, conversely, the counter-element 52 in the inner circumference or on the inner circumference of the through opening 51 can be a negative, i.e. recessed, counter-element.

However, since a material removal - i.e. a negative element - is easier to produce than applying additional material and, in addition, the anti-twist element on the outer circumference of the protective sleeve 4 should extend essentially over the entire length, it is easier to install the anti-twist element on the protective sleeve 4 negative in the form of a groove, which, however, means that - with a one-piece construction of the counter element 52 - the through opening 51 cannot be produced by simple drilling, but rather by, for example, laser cutting in order to create the positive counter element 52 or several of them that protrude radially inwards to create.

Since this is subsequently difficult and complex on an existing machine, to which the receiving component 50 usually belongs, an external anti-rotation protection can be achieved by a separate anti-rotation part 40 with the purpose that on the receiving component 50, in particular at its through opening 51 , no positive element needs to be created for anti-twist protection and not on sensor 1 either.

This is according to the 4a, b , c can be achieved in that the separate anti-rotation part 40 is a sheet metal part with a through opening 41 through the main plane of the sheet metal, preferably with a round shape, through which the sensor 1 can be inserted.

These can in turn be simple bores 52.1, 52.2 with a round cross section away from the through bore 51 with different radial distances from the through opening 51 and/or with different diameters, so that the anti-rotation part 40 is only in a rotational position and in an insertion direction 10A Noses 42.1, 42.2 in the bores 52.1, 52.2 fit with the inner circumference 41 of the anti-rotation part 40 in alignment with the through opening 41 of the supporting component 50.

This must be done in accordance with 4c the recess 41 in the anti-rotation part 40 is not a circumferentially closed opening for inserting the sensor 1 through the plane of the sheet metal part 40, for example, but it can also be a one-sided open, i.e. U-shaped or C-shaped opening in the sheet metal plane, so that the anti-rotation part 40 can also be pushed onto the sensor 1 transversely to the longitudinal direction 1 'and, if necessary, can lock on it while expanding its two legs.

The anti-rotation element 43 is then preferably arranged exactly opposite the opening of this recess 41 in the anti-rotation part 40.

Since the anti-rotation part 40 further has the internal anti-rotation part 43 projecting inwards from its inner circumference 41 in the form of the radially inwardly projecting nose, which fits into the groove 15 in the outer circumference of the protective sleeve 4, the anti-rotation part 43 is also rotationally fixed fixed relative to sensor 1.

In order to prevent the axially directed lugs, i.e. the external anti-rotation elements 42, from moving axially out of the supporting component 50, the separate anti-rotation part 40 is clamped between the nut 18 and the sensor-carrying component 50 when mounting the sensor 1.

In such a sheet metal part 40 or other plate-shaped component, a positive extension or nose protruding into an inner circumference can be produced much more easily than on a part 50 of an existing machine, be it by cutting out with a laser or punching out.

The axially directed lugs 42.1, 42.2 can also be easily produced by bending a correspondingly designed sheet metal blank.

If such a sensor 1 - as in 2a shown - must often be installed in the same installation situation - i.e. in the same sensor-carrying component 50 with always the same distance A to the magnet M, which is always positioned in the same way - so it makes sense to use a fixed axial stop in order to shorten the assembly effort to always achieve the same distance A.

This is what they show 5a until 5d each a separate longitudinal stop part 30, which is plate-shaped over its main part and here again is a sheet metal part.

The longitudinal stop part 30 is, for example, according to 5b Looking at its main level, it is designed in a U-shape with an interior space whose width lies between the two inner edges of its U-shapes kel 30a, 30b has a maximum width that is smaller than the outer diameter of the sensor 1.

In order to be able to attach the longitudinal stop part 30 to the sensor 1 in a form-fitting manner at a certain axial position, a flattening 13 is made at the desired axial position on two opposite sides of the circumference or even just on one side in the outer circumference of the protective sleeve 4, for example by milling, so that at this point the thickness of the protective sleeve 4 between the two or from one flattened area in the opposite direction is D1 or slightly smaller.

Then you can according to 5a the axial stop part 30 can be pushed transversely onto the protective sleeve 4 at the location of this at least one flattening 13, the U-legs 30a, b preferably having in their free end region a locking extension 32 pointing towards the other U-leg, which when Slide it on behind the protective sleeve 4.

A bend of the sheet metal part out of its main plane at the end opposite the open side serves as a sliding bend 33, i.e. to enlarge the pressure area when pushing with a finger and similarly when pulling off the rotation angle sensor 1.

Instead of an axial stop part 30 designed symmetrically to a longitudinal center line between the two legs 30a, b as in 5c can according to 5b only one of the two legs can be designed as described above, while from the other U-leg 30b - which then does not have to have a locking projection 32 - an external anti-rotation element 34 in the form of a nose protrudes in the direction of the other leg 30a, which is in the Groove 15 fits in the outer circumference of the protective sleeve 4. Then - depending on the cross-sectional dimensioning and shape of the positive anti-rotation element 34 and the groove 15 - possibly even on the opposite side of the circumference of the protective sleeve 4 on the flattening 13 shown in the drawing in the form of a tangentially extending groove in the outer circumference of the protective sleeve 4 can be dispensed with, by appropriately adjusting the distance between the mutually facing inner edges of the two U-legs 30a, 30b to a size corresponding to at least the outer diameter of the protective sleeve 4.

5b shows in variation opposite 5c a symmetrical design of the axial stop part 5c and analogously with locking projections 32 at the free ends of the U-legs 30a, b, but here the U-legs 30a, b diverge in a V-shape towards their free ends, which can make it easier to push on. In order to prevent the axial stop part 30 from being unintentionally removed, it is also preferably clamped between one of the nuts 18, 19 and the sensor-carrying component 50 when mounting the sensor 1.

The 6a, b show a longitudinal stop part 30, which also fulfills the function as a separate anti-twist part.

The longitudinal stop part with its two U-legs 30a, b can each be based on the 5 have the shape and design described, for which purpose in 6b the design according to 5c was chosen.

The anti-twist function is provided by the fact that at the end of the axial stop part facing away from it, i.e. the U-shaped recess - preferably produced by bending from the main plane of a flat sheet metal blank - there is a sliding offset 33 not only in one direction Gripping and pressing with the hand or finger is present, but external anti-rotation elements 34.1, 34.2 are cranked in the other direction from the main plane of the main part, which are dimensioned and positioned relative to one another in such a way that they fit into corresponding negative anti-rotation counter elements, preferably Holes 52.2, 52.1 or through holes fit in the receiving component 50.

For this purpose, a nose 34.1, 34.2 is formed at the ends of the opening of the recess opposite the end edge, which have a different cross-sectional size, so that the nose with the larger cross-section does not enter a bore 52 which is intended to accommodate 34.2 with the small cross-section , fits, as shown in the 4 explained.

This longitudinal stop part 30 can first be pushed onto the point with the at least one flattening or recess in the outer circumference of the protective sleeve 4 transversely to the axial direction 1 'and then pushed together with the sensor 1 in the longitudinal direction 1' through the through opening 51, until the two lugs 34.1, 34.2 are inserted as positive anti-twist elements in the through holes 52.1, 52.2 provided in the supporting component 50. By tightening the preferably still two nuts 18, 19 - with the longitudinal stop part 30 being located between one of the nuts and the component 50 - the unintentional removal or twisting or displacement of the longitudinal stop part 30 is ruled out.

• Hierfür stehen in der Seitenansicht der 7a, b betrachtet aus der oberen Hälfte des Grundkörpers der Steckerbuchse 8 auf zwei Höhenniveaus verteilt Lötstifte 8b1, 8b2 in axialer Richtung 8' der Steckerbuchse 8 vor, deren um 90° nach unten gekröpfte Enden - verteilt auf in diesem Fall zwei verschiedene Axialpositionen - die bis auf das gleiche Höhenniveau herabreichen und deren gekröpfte Enden so zueinander positioniert sind, dass sie in entsprechende Durchgangsbohrungen der Hauptplatine 6.1 passen, gegenüber der sie dann verlötet werden können.

The 7b, c also show the connection area between the main board 6.1 and the plug socket 8, and in 7a How the main board 6.1 is automatically populated not only with electronic components, but also with this plug socket 8:

• This is what is shown in the side view 7a, b Viewed from the upper half of the base body of the plug socket 8, solder pins 8b1, 8b2 are distributed over two height levels in the axial direction 8 'of the plug socket 8, the ends of which are bent downwards by 90 ° - distributed over two different axial positions in this case - except for that reach down to the same height level and the offset ends of which are positioned relative to one another so that they fit into corresponding through holes in the main board 6.1, to which they can then be soldered.

In addition, at least two positioning pins 8b3 protrude from the lower half of the base body of the plug socket 8 in the axial direction 8 ', the free ends of which are cranked in the opposite direction, i.e. upwards, but not by 90 °, but only by about 45 ° are.

These positioning pins 8b3 are so long that when installed, the 7b their free ends rest on the underside of the main board 6.1, but while the soldering pins 8b1 and 8b2 are inserted from above the board, the positioning pins 8b3 can move past the end face of the board 6.1 due to their own elasticity and lock under the main board 6.1, which are thereby between the positioning pins 8b3 on the one hand and the upper soldering pins 8b2 or an upper stop of the base body of the plug socket 8 which is present there - not shown.

This ensures pre-fixation until the soldering pins are subsequently soldered to the main board 6.1 and the sensor unit 3 is subsequently cast using a casting compound.

REFERENCE SYMBOL LIST

1

Rotation angle sensor

1'

Longitudinal direction

2

Protection unit

3

Sensor unit

4

protective sleeve

4'

Longitudinal direction

4a

Floor

5

Sensor element

6

Electronics board

6"

Main level

6.1

Main board

6.1 a, b

head Start

6.2, 6.3

Cross board

6.2a

recess

6.3a

recess

7

Evaluation circuit, component

8th

Connectors

8th'

axial direction

8a

Contact pin

8b

soldering pin

8c

collar

9a

internal anti-twist element

9b

internal anti-twist counter element

10

axial direction

11

Transverse direction

12

Transverse direction

13

flattening

14

Thread, external thread

15

external anti-twist element

15"

Longitudinal median plane

15a, b

Flank

16

Flex board

17

Distance bar

18

Mother

19

Mother

20

External thread

21

inner thread

30

Axial stop part

30 a, b

poor

31

Recording opening, recording passage opening

32

Resting process

33

Sliding offset

34

external anti-twist element

40

Anti-twist part

41

Recording opening, recording passage opening

42

external anti-twist element

43

internal anti-twist counter element

50

load-bearing component

51

Recording opening, recording passage opening

52

external anti-twist counter element

A

Distance

D1

diameter

M

magnet

N

North Pole

S

South Pole

VK

Casting body

VM

Potting compound

Claims (20)

Angle of rotation sensor (1) with - a protection unit (2) with a slim, cup-shaped protective sleeve (4) with an open end face (4b), - a sensor unit (3) located therein comprising - a magnetic field-sensitive, in particular magnetic field - Direction-sensitive sensor element (5), - at least one electronic board (6), which carries the sensor element (3) and other electronic components (7), in particular as an evaluation circuit (7) for the signals of the sensor element, - one electrically connected to the electronic board (6) plug connector (8), which tightly closes the open end face (4b), characterized in that - at least the bottom (4a) of the cup-shaped protective sleeve (4) made of metal, in particular non-magnetizable metal , consists. Rotation angle sensor Claim 1 , characterized in that - the connector (8) with its axial direction (8 '), the main extension direction of its outward-facing contact pins (8a) or contact sockets, parallel to or on the main plane (6") (define) along The main circuit board (6.1) runs along the longest longitudinal extent of the protective sleeve and is soldered directly to it via inward-pointing soldering pins (8b, c) and/or - the plug connector (8) on the one hand and the protective sleeve on the other hand each have at least one so-called internal anti-twist element ( 9a, b), which interlock with each other in a form-fitting manner. (Invention:) Angle of rotation sensor according to one of the preceding claims, characterized in that the cup-shaped protective sleeve (4), which is made of metal, in particular non-magnetizable metal, is made in one piece and/or has a thread (14) on the outer circumference. (External anti-twist protection:) Angle of rotation sensor according to one of the preceding claims, characterized in that - the protective sleeve (4) has at least one positively insertable, so-called external anti-rotation element (15), - in particular in its outer circumference and / or - in particular a negative (defined) anti-rotation protection -Element (15). Angle of rotation sensor according to one of the preceding claims, characterized in that the external anti-rotation element (15) is designed such that it allows insertion into a receiving opening (51), in particular a receiving through-opening (51), of a the angle of rotation -Sensor (1) carrying part (50), which has a matching anti-rotation counter element (55), only in a rotational position and / or with the sleeve base (5a) ahead only in one insertion direction. (Outside of sleeve:) Angle of rotation sensor according to one of the preceding claims, characterized in that - the external anti-rotation element (15) extends over at least part of the axial length, in particular more than 50%, in particular more than 70%, in particular the entire axial length Protective sleeve extends. Angle of rotation sensor according to one of the preceding claims, characterized in that - only one, in particular negative, anti-rotation element (15), in particular in the form of a trough-shaped recess (15), is present, - which in particular has one extending radially and axially Longitudinal center plane (15") of its cross-sectional shape has an asymmetrical shape, in particular asymmetrical directions of its flanks (15a, b). Angle of rotation sensor according to one of the preceding claims, characterized in that - distributed over the circumference there are several, in particular negative, anti-rotation elements (15.1, 15.2), in particular in the form of trough-shaped recesses, - which are particularly different in terms of their transverse Differentiating the cross-sectional shape in such a way that the protective sleeve (4) can only be inserted with its base (4a) into a receiving through opening (51) equipped with a matching anti-rotation counter-element (55) in one insertion direction and/or - its longitudinal center plane (15"), especially when there are only two anti-rotation elements (15.1, 15.2), are objectionable with regard to their rotational position about the axial direction (4', 1') by an intermediate angle of less than 180°. (Separate anti-rotation part:) Angle of rotation sensor according to one of the preceding claims, characterized in that - an external anti-rotation counter element (45) which can be fastened to the outside of the angle of rotation sensor (1) in a form-fitting manner, in particular by means of its external anti-rotation counter element (45), in particular in the axial direction (1 ') on the angle of rotation -Sensor (1) is present, in particular by means of a receiving passage opening (41), anti-rotation part (40) which can be pushed on, - in particular in the form of a punched or laser-cut, possibly bent, sheet metal part (40). Angle of rotation sensor according to one of the preceding claims, characterized in that - the anti-rotation part (40) has at least one positive anti-rotation element (44) and / or anti-rotation counter-element (45), in particular several, in particular both radially inwards and has a positive anti-twist element (44) and/or anti-twist counter-element (45) pointing outward, in particular radially outward, - in particular the positive anti-twist counter-element (45) pointing radially inward to a negative external anti-twist element ( 15) the protective sleeve (4) fits and / or - the outward-facing positive anti-rotation element (44) can be used to interact with a component (50) carrying the rotation angle sensor (1). (Axial stop:) Angle of rotation sensor according to one of the preceding claims, characterized in that - a device that can be fastened on the outside of the angle of rotation sensor (1) in a form-fitting manner, in particular by means of its external anti-rotation element, and can be pushed on, in particular transversely to the axial direction (1 '), in particular in the transverse direction (11, 12), lying axial stop part (30) is present, - in particular in the form of a punched or laser-cut, possibly bent, sheet metal part (30). Angle of rotation sensor according to one of the preceding claims, characterized in that - the axial stop part (30) is a U-shaped sheet metal part (30) with its U shape lying in the plane of the sheet metal, - the outer circumference of the protective sleeve ( 4) at one, in particular several, axial positions has one or two flattenings (13) or recesses (15) of its round outer circumference which are opposite one another with respect to the axial direction (1'), the thickness (D) of which is thereby reduced in such a way that the U-sheet metal part (30) can be pushed onto it transversely, in particular in the transverse direction (11, 12), but not axially away from this flattening (13). Angle of rotation sensor according to one of the preceding claims, characterized in that the axial stop part (30) has at least one anti-rotation element (34), in particular a positive anti-rotation element (34), which is designed to cooperate with the anti-rotation counter element ( 55) of the component (50) carrying the rotation angle sensor (1) can be used. Rotation angle sensor according to one of the preceding claims, characterized in that the plug connector (8) has soldering pins (8b) which extend in the axial direction (8 ') out of the housing of the plug connector (8) and their free end is approximately is cranked at right angles to it and / or - has positioning pins (8c) which extend from the housing of the connector (8) in the transverse direction in the axial direction (8 ') at a distance from the soldering pins (8b) and their free end is cranked obliquely thereto is in the direction of the soldering pins (8b). Sensor modular system according to one of the preceding claims, characterized by - one, in particular several, types of protective sleeves (4), - several types of anti-rotation parts (40) and / or axial stop parts (30), in particular each designed in accordance with the above claims. Method for producing a rotation angle sensor with - a protection unit (2) with a slim, cup-shaped protective sleeve (4) with an open end face (4b), - a sensor unit (3) located therein comprising - a magnetic field-sensitive, in particular Magnetic field direction-sensitive sensor element (5), - at least one electronic circuit board (6), which carries the sensor element and other electronic components (7), in particular as an evaluation circuit (7) for the signals of the sensor element (5), - a plug connector (8) electrically connected to the electronic board (6), which tightly closes the open end face (4b), in particular of a rotation angle sensor (1) according to one of the preceding claims, characterized in that the sensor unit ( 3) is inserted into the open end face (4b) of the protective sleeve (4) with the bottom (4a) of the protective sleeve (4) closed. Procedure according to Claim 16 , characterized in that the pot-shaped protective sleeve (4) is manufactured in one piece together with its base (4a). Method according to one of the preceding method claims, characterized in that - either the amount of not yet hardened casting material (VM) required for casting the sensor unit (3) in the protective sleeve (4) is already complete when the sensor unit (3) is inserted is filled in the protective sleeve (4) - or at least part of the required amount is filled into the protective sleeve (4) while the sensor unit (3) is inserted. Method according to one of the preceding method claims, characterized in that a separate anti-rotation part (40) and/or axial stop part (30) is made from sheet metal, in particular is cut out by means of a laser and, if necessary, is bent. Method according to one of the preceding method claims, characterized in that the plug connector (8), which is aligned with its longitudinal direction (8') parallel to the longitudinal direction (6') of the electronic board (6), is for mounting on the electronic board (6) in the transverse direction to the main plane (6 ") the electronic board (6) is inserted with the free ends of its soldering pins (8b) first into the solder openings provided in the electronic board (6) while locking the at least one positioning pin (b3) behind the electronic board (6).

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