DE202018106120U1 - Transmitter unit for a rotary sensor - Google Patents

Abstract

Encoder unit (1) for attachment to a shaft journal (100) with a non-round, in particular round, but flattened, cross-section (100 ") with
- A base body (3) having a receiving opening (13) for receiving the shaft journal (50) extending in the axial direction (10, 100 '),
- A particular cup-shaped magnet part (2) which comprises a donor element (50), in particular a donor magnets (50), characterized by
a positive connection part (4) with a form-fitting recess (14) with respect to the rotation about the perpendicular to the cross-section (14 ") of the form-fitting recess (14) stationary axial direction (10) positive reception of the shaft journal (100), in that the form-fitting recess (14) at least partially has an inner circumference (14a) matching the outer circumference (100a) of the shaft journal (100).

Description

field of use

The invention relates to a transmitter unit with a base body and attached donor element for a rotary position sensor (one-turn) or a rotation sensor (multi-turn). If the sensor is a sensor sensitive to magnetic field, such a transmitter unit comprises a base body with a donor magnet fixed thereto in a rotationally fixed manner.

II. Technical background

As a rule, the rotary position sensor is mounted on a stationary component and, opposite to the sensor, the encoder unit is mounted co-rotating on that rotating component whose rotation is to be detected.

It goes without saying that in the mounted state as possible no play in the direction of rotation between the encoder unit and the component to be detected should be present, since this would worsen the accuracy of measurement.

Even faulty assemblies with an unrecognized differential angle between the encoder unit and the component carrying them must be largely excluded.

Depending on the circumstances of the load-bearing component, the encoder unit must be designed differently on the attachment side and fastened thereto in different ways.

A typical situation is that the supporting, in particular rotating component is a shaft journal with a non-circular cross-section, for example a polygonal cross-section or a round cross-section with flattening. This has the advantage that the encoder unit can be fastened with a form-fitting design to the shaft journal.

At the attachment point, there are often cramped spaces, so that mounting options that require a radial attachment of a fastener such as a radially screwed clamping screw can not be used. The transmitter unit should therefore preferably be mountable only by being plugged onto the shaft journal in the axial direction.

In addition, both the assembly and disassembly of the transmitter unit should be as simple as possible and possible without tools.

Nevertheless, the encoder unit should be simple and therefore inexpensive to produce.

In this context, a non-positive rotation between shaft journal and encoder unit is known in which a base body of the encoder unit on the receiving side for the magnet opposite mounting side has a blind hole with a round inner cross-section, in which the shaft journal with its round, but flattened on one side Cross-section - hereinafter called only flattened shaft journal - is inserted along its axial direction.

By a transversely inserted, partially surrounding the shaft journal and partially the base body, C-shaped spring, the cross section of the shaft journal is acted upon by the flattened side radially by means of a straight leg of the spring with spring force and against the opposite part of the inner periphery of the blind hole pressed.

A positive connection between the base body and shaft journal is not achieved, since only the contact force of the spring on the base body prevents rotation of the base body relative to the unit of shaft journal and spring.

III. Presentation of the invention

Technical task

It is therefore the object of the invention to provide a transmitter unit available that can be mounted and dismantled without tools on a flattened shaft journal, is constructed simple and reliable and requires no accessibility from the scope of the shaft pin forth for assembly and disassembly. Preferably, the rotation in the encoder unit is formed positively.

Solution of the task

This object is solved by the features of claim 1. Advantageous embodiments will be apparent from the dependent claims.

In terms of function, such a transmitter unit consists of several parts, which may be partially functionally combined and formed together in one piece:

On the one hand, a base body, which has a receiving opening into which the shaft journal can be inserted for a sufficiently long distance in order to obtain a strong due to the existing game Tilting the encoder unit with respect to the shaft journal to avoid a transverse axis.

For this purpose, the receiving opening in the axial direction of the shaft journal - which is then also in the mounted state and the axial direction of the receiving opening - should have at least a length corresponding to the diameter of the shaft journal, preferably a multiple of the diameter.

Furthermore, the transmitter unit comprises a magnet part in which the transmitter element, to which the sensor interacting with the transmitter unit reacts - usually a transmitter magnet - is arranged and fixed. Preferably, the magnetic part is pot-shaped, in order to be able to receive the transmitter magnet therein safely and protected, in particular in order to be able to shed it with a hardening potting compound.

In the simplest case, however, the magnet part can also consist only of the encoder magnet itself, in which this on the base body 3 directly attached, for example, glued, is

Further, a positive connection part is present, which produces the positive connection between the shaft journal and the base body, on the one hand the form-fitting part is positively secured to the shaft journal and on the other hand, the positive connection part is positively secured to the base body or integrally formed therewith.

The positive-locking part is preferably arranged on the side opposite the magnet part, the attachment side of the transmitter unit.

If the form-fitting part is manufactured as a separate part and has to be fastened to the base body, it can preferably be slid onto it, either in the longitudinal direction, in particular from the attachment end, or in the transverse direction.

Since the manufacturing costs, especially of the base body should be as small as possible, the receiving opening for the shaft journal in the base body is preferably formed with a round cross-section, so that it can be inexpensively produced by drilling, turning or milling. A non-round cross-section such as a flattened circular shape, however, is much more expensive to produce, especially if the receiving opening is a blind hole and not a through-hole.

In the latter case, such an opening formed as a positive connection opening in the form of an extruded part could be prepared, and then could either be used as a base body or used as a separate insert in a base body.

The magnet part or even the magnet could be manufactured separately and fastened on the one end face of such an extruded part.

• - spanabhebendem Verfahren wie Drehen oder Fräsen hergestelltes oder zumindest nachbearbeitetes Teil,
• - durch Urformen hergestelltes und gegebenenfalls mit einem spannabgebenden Verfahren nach bearbeitetes Teil,
• - ein Blech-Biegeteil ,
• - - ein durch ein interaktives Verfahren wie etwa 3-D-Druck hergestelltes Teil

The base body is preferably a means

• - machined or at least post-processed part, such as turning or milling,
• - manufactured by primary molding and possibly with a spannabgebenden method after machined part,
• a sheet metal bending part,
• - a part made by an interactive method such as 3-D printing

preferably consisting of metal.

Both the form-fitting part and such a sheet-metal bent part can in particular be made of an elastic material, preferably spring steel, and a particularly circumferentially closed, positive-fit recess provided therein can preferably be produced by means of stamping.

The transmitter unit may further include a biasing member, in particular a biasing spring, which minimizes the always present even with a positive connection between the form-fitting recess and the outer periphery of the shaft journal to be accommodated by biasing the two parts in the transverse direction against each other.

The transmitter unit may further comprise a trigger brake, which makes it difficult to remove the transmitter unit from the journal, in order to avoid unintentional withdrawal in the longitudinal direction.

Such a trigger brake is usually achieved by means of concerns a part, usually the positive connection part or biasing part, with bias on the outer circumference of the shaft journal, since a positive locking is not possible because of the shaft journal - in the Usually has no circumferential groove - no operations can be performed and allowed.

embodiments

• 1: ein separates Formschlussteil einer 1. Bauform in perspektivischer Ansicht,
• 2: dieses Formschlussteil im montierten Zustand,
• 3a - d: dieses Formschlussteil in perspektivischer Ansicht im montierten Zustand,
• 4a, b: ein separates Formschlussteil einer 2. Bauform im montierten Zustand im Längsschnitt sowie in der Frontansicht,
• 5a, b: ein separates Formschlussteil einer 3. Bauform im montierten Zustand im Längsschnitt sowie in der Frontansicht,
• 6a, b: ein separates Formschlussteil einer 4. Bauform im montierten Zustand im Längsschnitt sowie in der Frontansicht,
• 7a, b: ein separates Formschlussteil einer 5. Bauform im montierten Zustand im Längsschnitt sowie in der Frontansicht,
• 8a - e: ein separates Vorspann-Teil einer 1. Bauform bei einem Basiskörper mit integriertem Formschlussteil im montierten Zustand,
• 9: eine Frontansicht der Lösung gemäß 8,
• 10a: ein separates Vorspann-Teil einer 2. Bauform bei einem Basiskörper mit integriertem Formschlussteil in perspektivischer Ansicht vor der Montage,
• 10b, c: die Teile gemäß 10a montiert in verschiedenen Ansichten,
• 10d: die Teile gemäß 10a montiert im Längsschnitt,
• 11a: ein kombiniertes Gesamt-Teil in Form eines Blech-Biegeteiles in der Seitenansicht,
• 11b - d: das Teil gemäß 11a in verschiedenen Schnittdarstellungen
• 12a, b: eine Lösung mit separatem Magnetteil.

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

• 1 : a separate form-fitting part of a first design in perspective view,
• 2 : this form-fitting part in the mounted state,
• 3a - d: this form-fitting part in a perspective view in the mounted state,
• 4a, b : a separate form-fitting part of a second design in the assembled state in longitudinal section and in the front view,
• 5a, b : a separate form-fitting part of a third design in the assembled state in longitudinal section and in the front view,
• 6a, b : a separate form-fitting part of a 4th design in the assembled state in longitudinal section and in the front view,
• 7a, b : a separate form-fitting part of a 5th design in the assembled state in longitudinal section and in the front view,
• 8a e: a separate pretensioning part of a 1st design in the case of a base body with integrated form-fitting part in the mounted state,
• 9 : a front view of the solution according to 8th .
• 10a : a separate preload part of a second design in a base body with integrated form-fitting part in a perspective view before assembly,
• 10b, c : the parts according to 10a mounted in different views,
• 10d : the parts according to 10a mounted in longitudinal section,
• 11a : a combined total part in the form of a sheet-metal bent part in the side view,
• 11b - d: the part according to 11a in different sectional views
• 12a, b : a solution with separate magnetic part.

Both 1 to 7 is the base body 3 the encoder unit 1 integral with a cup-shaped magnet part 2 formed by this base magnet part 2 + 3 has an approximately cylindrical basic shape and at one end, the magnetic end, as a magnetic part 2 has a frontal depression in which the donor magnet 50 arranged and fixed, in this case potted with a hardening mass is.

The 12 shows a solution with separate, on the base body 3 were attached, magnet part 2 regardless of how the base body 3 is designed, so with no or no integrated form-fit part 4 ,

In the opposite end face, at the attachment end, there is the mouth 13a in the axial direction 10 extending, preferably formed as a blind hole, receiving opening 13 of the base body 3 , which has a round cross-section and thus can be produced in a simple manner as a bore. Your length L in the axial direction 10 is preferably larger than its diameter D and its cross-section corresponds to the flattened cross-section of the shaft journal added to a complete circle 100 with as little play in between as possible.

In the outer circumference, this combined base magnet part has 2 + 3 flats described later 3a . b on, which can be prepared by milling, for example, so that this base magnet part 2 + 3 on the one hand by turning and on the other hand, the non-rotational metric surfaces can be made by machining chip removal, in this case cost in only a single setup in a rotation -Fräs machine.

The in terms of its cross-section 100 ' flattened, non-circular shaft journal 100 is in such a round receiving opening 13 However, freely rotatable if no additional rotation is provided, in this case in the form of the positive connection part 4 ,

Both 1 to 3 is the form-fitting part 4 as a separate, in cross-section approximately U-shaped profile part 6 formed, with the fit the exact fit to the outer circumference 100a of the shaft journal 100 offering positive locking recess 14 in the connecting leg 6b of the profile part 6 punched out.

The base body 3 , in this case the base magnet part 2 + 3, has at the attachment end in the rotationally symmetrical outer periphery of the base body 3 opposite flats 3a . b on that in the same transverse direction 11 run, and preferably parallel to each other, at least in the side view considered such a contour of the attachment end of the base part 3 revealed that the U-shaped form-fitting part 4 fitting from the upper recess 3a out around the front face and along the lower flattening 3b along this end of the base body 3 can be placed.

The clear width of the U-shaped profile part 6 corresponds approximately to the thickness between the two flats 3a . b ,

This may cause the profile part 6 around the longitudinal direction 10 no longer with respect to the base body 3 twist, creating a rotation throughout the magnetic part 2 until through the Form-fitting recess 14 and preferably into the receiving opening 13 of the base body 3 inserted shaft journal 100 given is.

The arrangement of the U-shaped form-fitting part 4 on the base body 3 or the attachment end of the base magnet part 2 + 3 can be performed in different ways:

The 1 , Possibility is this U-shaped profile part 6 with its profile direction 6 ' in the transverse direction 11 on the attachment end of the base body 3 defer, leaving the connecting leg 6b in front of the end face of the base body 3 comes to rest and the two free-ending thighs 6a . c parallel to the flattenings 3a . b of the base body 3 run, preferably to this concern.

A fixation of these two parts to each other in the transverse direction 11 is through the inserted shaft journal 100 ensured.

A 2 , Possibility is the profile part 6 with the free ends of the free-ending legs 6a . c ahead in the longitudinal direction 10 from the front side to the base body 3 postpone.

Without further action, the fixation of these two parts to each other in the transverse direction would also 11 only through the inserted shaft journal 100 respectively.

However, with this slide-on direction, it is also possible to position it transversely even without the shaft journal inserted 100 ensure by - as in the 3a, b shown - the one flattening 3a on their sides in the longitudinal direction 10 extending, projecting radially outward beads 3a1 . 3a2 , between which the free-ending leg 6a to come to rest.

In addition, if such a free-ending leg, for example 6a, at its free end in the profile direction 6 ' projecting laterally at least one extension 6a1 . 6a2 has - as in 1 pictured top left - and the beads 3a1 . 3a2 are formed according to their length, these extensions 6a1 . 6a2 behind the end facing away from the end face of the beads 3a1 . 3a2 to come to rest and a removal of the profile part 6 longitudinal 10 from the base body 3 prevent.

For this purpose, however, must - in contrast to sliding in the transverse direction 11 - the profile part 6 elastic, for example made of spring steel, to the free-ending leg 6a . c of the profile part 6 to be able to bend it so far apart that it with its extensions 6a1 . 6a2 over the beads 3a1 . 3a2 can be pushed along.

However, such axial trigger safety can also be offered by one of the freely ending legs, for example 6c, at its free end in the profile direction 6 ' looks at an inwardly bent bend 18 has, with the profile part 6 in one in the transverse direction 11 running groove 7 in the outer periphery of the base body 3 can be inserted.

If this groove 7 radially so deep that it is the inner circumference of the receiving opening 13 breaks through, this can be offset 18 be sized so that the free end of this leg 6c on the shaft journal 100 is applied.

If the positive locking recess 14 in the form-fit part 4 in terms of their rotational position is positioned so that their flattening 14a parallel to the end edge of the bend 18 runs, this can be so dimensioned in terms of length and inclination that they at the flattening 100a1 on the outer circumference 100a of the shaft journal 100 is present, preferably due to resilient properties of at least this leg 6c with bias voltage applied.

If this adjacent end edge is sharp-edged and the bend 18 towards the bottom of the blind hole, so the end of the shaft journal 100 Being obliquely forms such a bend 18 also a brake against unintentional removal of the encoder unit 1 from the shaft journal 100 ,

In the solution of 4a, b is the form-fit part 4 plate-shaped as a plate part 8th trained and is with the free ends of his free-ending legs 8a . c ahead in the transverse direction 11 on the base part 3 deferred in existing there, in the transverse direction 11 running straight grooves 7a . b of which one is a groove 7a the wall of the reception opening 13 breaks through.

Here is the clear width B between the two free-ending thighs 8a . c such that when in the receiving opening 13 plugged shaft journal 100 this the distance A between the bottom of the groove not penetrating the wall 7b and the opposite of this groove arranged flattening 100a1 of the shaft journal 100 equivalent. The one in the breaking groove 7a arranged, free-ending legs 8a then lies with its respect to the free space of the U-shape inner, preferably straight, longitudinal edge of the flattening 100a1 of the shaft journal 100 on.

Because the other free-thighs 8c is at the bottom of the straight groove with its straight inner edge without or with little play between them, is a positive connection on the one hand between the shaft journal 100 and plate part 8th and on the other hand between plate part 8th and the grooves 7a . b of base body 3 against twisting about the longitudinal direction 10 , with plugged shaft journal 100 always the axial direction 100 ' of the shaft journal 100 corresponds, given.

As in 4a shown, several such, on the same side open, U-shaped plate parts 8th longitudinal 10 spaced available and via a connecting web 15 be connected to the two plate parts 8th on any page - as in 4a represented, for example, between two analog free-ending legs 8a or between the two connecting thighs 8b - Can connect except on the side to which the free space of the U-shaped plate part 8th is open. This results along the shaft journal 100 several spaced anti-rotation devices that provide increased resistance to twisting.

Preferably, however, as also in 4a shown - such in the plan view of the plate plane U-shaped plate part 8th of two mutually preferably arranged in parallel and interconnected plate parts 8th via a connecting bridge 15 ' with another plate part 8th' connected and together in the transverse direction 11 on the attachment end of the base body 3 deferred, but only the U-shaped plate part 8th with his two free-ending thighs 8a . c in the transverse direction 11 extending grooves 7a . b in the outer periphery of the base body 3 in the transverse direction 11 is inserted.

The axial position of these grooves 7a . b on the one hand and the length of the connecting bridge 15 ' on the other hand are chosen so that the further plate part 8th' in front of the end face of the base part 3 to come to rest.

On the one hand, this offers the advantage that the form-fitting recess 14 in this front, front panel part 8th' as in the solution according to the 1 to 3 can be punched out and thus completely from the plate part 8th' surrounded and thus offers a very high resistance to bending.

The rotational position of the positive locking recess 14 is of course fitting to the free space in the U-shaped plate part 8th chosen, so in a flattened round cross section, the flattening 14a the positive connection recess 14 parallel to the inner edge of the shaft journal 100 adjacent free-ending thigh 8a in the grooves 7a . b inserted plate part 8th selected.

This also offers the advantage that the rotational position of this form-fitting recess 14 is visible to the user when plugging the encoder unit 1 on the shaft journal 100 what happens in the grooves 7a . b lying, U-shaped plate parts 8th not the case.

The 5a, b show a solution, in turn, a U-shaped or better C-shaped profile part 9 is used, which, however, for attachment to the base body 3 longitudinal 10 from the mouth 13a out into the interior of the intake opening 13 is inserted.

Receiving bore 13 and profile part 9 are dimensioned so that in the mounted state of the shaft journal 100 with its cross section 100 ' Form fitting exactly inside the profile part 9 Find a place to the shaft journal 100 analog inner free cross section 100 ' thus preferably has a corresponding flattening.

To connect to the base body 3 own the free ending legs 9a . 9c at its free end in the circumferential direction, preferably in each case, at least one radially outwardly pointing extension 9a1 . 9c1 , in particular in its insertion direction, the axial direction 10 = 100 'front end, after insertion into an opening in the wall of the receiving opening 13 latched, said breakthrough in a radial bore or in a transverse, correspondingly deep, groove 7 can exist.

The free ending legs 9a . c must be sufficiently elastic to allow for insertion into the receiving opening 13 be bent radially inward so far that a pushing in until this breakthrough is possible.

The 6a, b show an analogous solution, but in which the C-shaped profile part 19 after insertion and locking against the base part 3 the clearance between the flattening 100 a1 of the inserted shaft journal 100 and the adjacent inner periphery of the receiving opening 13 fills out, so the profile part 19 with the outside of his connecting thigh 19b - and not as in the solution according to 5a, b with the inside of this connecting leg - at the flattening 100a1 of the shaft journal 100 is applied.

The 7a, b show as form-fit part 4 a rod part 23 which is in the axial direction 10 from the mouth 13a into the receiving opening 13 - Which has a round cross-section corresponding to the completed to a circle outer peripheral contour of the shaft journal 100 - can be inserted, and then from the mouth 13 something may or may not project.

Through a transversely of the rod part 23 protrude extension, in this case, a bend 23a at the front end of the rod part in the direction of insertion 23 and / or a deflection 23b thereof in the axial direction 10 is removed, - is the rod part 23 against twisting about the axial direction 10 opposite the base part 3 secured by these extensions in a corresponding, the wall of the base part 3 penetrating, drilling 20 engages accurately.

After inserting the shaft journal 100 fills the rod part 23 with its cross-section the space between the flattening 100a1 of the shaft journal 100 and the inner periphery of the receiving opening 13 as far as possible - as in 7b in the right half of the figure shown for a rectangular cross-section rod part 23 - or completely off - as in 7b shown in the left half of the picture with a district adapted to the free space in cross-section 23 - and lack of rotation of the rod part 23 can also be the shaft journal 100 not opposite to the base body 3 to be twisted.

Provided the two of the rod part 23 protruding processes, here the front crank 23a and the back bend 23b , along with the receiving holes 20 are dimensioned so that these two in the holes 20 can be achieved by two additional advantages:

For one thing is the rod part 23 thereby captive on the base body 3 fixed, even if no shaft journal 100 inserted in it.

On the other hand, this distortion can be designed by dimensioning the elements involved so that the rod part 23 - Which in this case of course must be made of elastic and preferably made of stainless steel - between the two extensions, so crank 23a and deflection 23b - a bulge takes in the receiving opening 13 is curved convexly and only by the insertion of the shaft journal 100 by its flattening 100a1 flattened.

As a result, the rod part acts 23 at the same time as a leader spring 5 by radial preload the existing clearance between shaft journals 100 and inner circumference of the receiving opening 13 minimized.

The 8a to e and 9 show a first design of a solution in which the base body 3 integral with not only the magnetic part 2 but also with the form-fitting part 4 is formed as a total part 2 + 3 + 4, adding the receiving opening 13 in the form of a blind hole already an internal cross section analogous to the shape of the outer cross section of the shaft journal 100 has and thus at the same time the form-fitting recess 14 represents.

In addition, between the shaft journal 100 and receiving opening 13 = Positive connection recess 14 Minimize existing remaining game is in a recess 21 in the inner circumference of the receiving opening 13 a leader spring 5 taken on the one hand radially outwardly on the radially outwardly facing base of this recess 21 supported and on the other hand on the outer circumference of the shaft journal 100 , preferably on the flattening 14a opposite side of the receiving opening 13 = Positive connection recess 14 ,

The leader spring 5 is in the side view - on the spring 5 and in the installed state at the same time on the base part 3 - Also considered approximately U-shaped, more precisely omega-shaped, designed by at least one of the free ends 5a . b in the side view on the U-shape or omega-shape is beheaded outward to the spring 5 inside the whole part 2 + 3 + 4 to fix.

The leader spring 5 So lies with its transverse to the side view main plane parallel to the longitudinal direction 10 of the base part 3 , here the total part 2 + 3 + 4, in the recess 21 , and inserted from the mouth 13a the intake opening 13 out with the free ends 5.1 . 5.2 advance until at least one of these free ends 5a . b inside the base body 3 is locked:

For this purpose, on the one hand in the wall, which is the recess 21 surrounds, in particular near the magnetic part 2 , a breakthrough in the wall of the base body 3 present, be it in the form of a transverse direction 11 extending groove 7 or a radial bore 20 analogously 5a, b ,

Furthermore, between the recess 21 and the receiving opening 13 one in the transverse direction 11 extending pin 22 available from the longitudinal direction 10 rear end of the recess 21 is spaced.

This can - as in 8c shown - the spring 5 im in the base body 3 inserted state with the one free end 5.1 pointing outward in this breakthrough and the other free end 5.2 in the distance between the pin 22 and the end of the recess 21 longitudinal 10 lie.

For this purpose, the one with the free ends 5.1 . 5.2 obliquely upward-pointing spring 5 according to the 8a, b with pressed against each other free ends in the longitudinal direction 10 pushed in and that one free end 5a behind the cone 22 hooked. Swinging up the closed end of the omega-shaped spring also snaps the other end 5.1 in the breakthrough, so the hole 20 or the groove 7 , on.

Preferably, the main body of the spring 5 a flattened side, in the assembled state at the radial, in the longitudinal direction 10 extending, outside of the recess 21 abuts while the convexly curved other side of the main body in the cross section of the receiving opening 13 protrudes and - after insertion of a shaft journal 100 according to the 8d, e - against the outer circumference 100a on the flattening 100a1 opposite side presses, so its flattening 100a1 against the flattening 14a the positive connection recess 14 in the base body 4 pushes and the game between the two parts 100 and 3 thus minimized.

The 10a to d show a second design of a solution in which the base body 3 integral with not only the magnetic part 2 but also with the form-fitting part 4 is formed as a total part 2 + 3 +. 4

The representations are largely consistent with those of 1 to 3d but only with the following differences:

For one, the receiving opening 13 in the base part 3 as a positive connection opening 14 formed, so to the outer contour of the inserted shaft journal 100 adapted, and this form-fitting opening 14 not only opens into the end face at the attachment end of the base part 3 , but also in the bottom of the cup-shaped magnet part 2 , This is also a total part here 2 + 3 + 4 available.

The big advantage of this solution is that this total part 2 + 3 + 4 can be produced very cost-effective as extruded profile and after cutting to the length of such a part, the necessary reworking can be performed on the outer circumference by machining operations.

To the shaft journal 100 To provide a longitudinal stop, the muzzle is in the magnetic part 2 completely or partially closed, especially in there the donor magnet 50 this muzzle at least partially covered.

On the other hand, the profile part has 6 - In contrast to the 1 to 3d - No longer the function as a positive connection part, since the passage opening in the connecting leg 6b has an inner circumference, which has no positive connection with respect to the outer circumference of the shaft journal 100 offers, for example, by being designed round and / or with a diameter larger than that of the shaft journal 100 ,

The profile part 6 acts in this design exclusively as a biasing spring 5 - again with two free-ending thighs 5a . c , a leg connecting these two legs 5b and also the other embodiments of the profile part 6 according to the 1 to 3d - as described there of a free-ending leg 5c with its offset at the free end 18 is designed so that it with its free end edge with bias radially against the flattening 100a1 the inserted - not shown here - shaft journal 100 pushes and thus the game to the surrounding receiving opening 13 = positive connection opening 14 minimized.

The 12a, b show that in all the solutions described so far, the magnet part 2 also a separate, on the base body 3 can be attached, regardless of whether the base body 3 at the same time the form-fitting part 4 is or not.

In the illustrated solution, there is the magnet part 2 from a base plate 2a that have two passages 24 having, which the screwing against the end face of the base body 3 serve. For more precise positioning, the magnet part 2 , in particular the base plate 2a , a positioning element 25 , in particular a projection or a recess, which preferably at the periphery of the base plate 2a is arranged.

On the mounted state of the base body 3 opposite side is on the base plate 2a attached to the transmitter magnet, which in this case consists of two separate magnets 50a . b which is symmetrical to the center of the base plate 2a and thus also the axial direction 10 of the base body 3 are arranged and in this case each of hardened potting compound 17 are surrounded.

In this case, the base plate presents 2a the longitudinal stop for the shaft journal to be inserted 100 represents.

The magnet part 2 However, could also exclusively from a single, in particular plate-shaped, donor magnet 50 with a polar direction transverse to the axial direction 1 exist, as in the 1 to 3d shown directly on the end face of the base body 3 is glued so that he has the centrally arranged through hole 13 or. 14 covers

The 11a to d show a third design, in which a base body 3 , Form-fitting part 4 and magnetic part 2 are integrally formed with each other as a total part 2 + 3 + 4, but especially this total part 2 + 3 + 4 is produced as a sheet-metal bent part.

For this purpose - as in 11a to recognize - a tin band 16 at least three times, better four times, beheaded, so that in the side view three approximately parallel to each other transverse leg 16a . b . c emerge, each by a longitudinal leg 16d . e connected to each other.

Here are the two longitudinal legs 16d . e concerning the center perpendicular to the transverse legs 16a . b . c on opposite sides of the middle perpendicular, otherwise these thighs would 16 a to e or f no continuous band 16 form.

Because in addition, preferably strives from the free end of the last transverse leg 16c another longitudinal leg 16f off, the part of the magnet part 2 is and a lateral boundary or attachment for the magnet 50 should form.

In the first two transverse legs 16a . b is each - see the 11b , c - a, preferably circumferentially closed, positive locking recess 14 arranged, preferably punched out, these two form-fitting openings 14 aligned with each other, so that the shaft journal 100 can be inserted through to the plant on the third transverse leg 16 c that does not have a positive connection opening 14 but as a stop for the shaft journal 100 serves.

To prevent the 3rd transverse leg 16c relative to the second transverse leg 16b Considering together in side view forming a U-shape is bent by the stop of the shaft journal 100 , These two transverse legs can be positively fixed against each other.

This is preferably possible because in one of the two longitudinal legs aligned with each other 16d . 16f , which protrude from the free ends of the U-shape, a tab 22 is punched out and beheaded at its free end so that after folding this tab 22 over the distance between the 2nd transverse leg 16b and 3 , transverse leg 16c away the bend at the free end of this flap 22 in a corresponding recess of the free expiring longitudinal leg 16f engages, and thus the 2nd and 3rd transverse leg are secured against being pressed apart form-fitting.

To another, of the freely expiring longitudinal leg 16f with respect to the center perpendicular to create opposite extension, to intervene, for example, form-fitting the magnet 50 can insert from the 3rd transverse leg 16c also a tab 22 ' punched out and bent by 90 °, so that it points with its free end in the same direction as the freely expiring longitudinal leg 16f and with the desired transverse distance to this.

The formation of a trigger brake is possible in this design, by the 1st transverse leg 16a or 2 , transverse leg 16b in the form-fitting recess 14 a tab 22 " punched out and in the direction of the free expiring longitudinal leg 16f is bent obliquely, this tab in their position still in the plane of the transverse leg 16b so long is that they are still in the inner circumference of the positive locking recess 14 as they are for passing the shaft journal 100 is needed, protruding, as in 11a to recognize.
By the two form-fitting openings 14 can not be arranged exactly aligned with each other, can - after inserting the shaft journal 100 - By the resulting tension of the two transverse legs 16a . 16b against each other about the axial direction 10 minimizing the clearance between the shaft journal 100 and the positive connection openings 14 be achieved.

LIST OF REFERENCE NUMBERS

1

transmitter unit

2

Magnetic part

2a

baseplate

3

base body

3a, b

flattening

3a1, 3a2

bead

2 + 3

Basic magnetic part

4

Form-fitting part

3 + 4

Basic form-fitting part

2 + 3 + 4

Total partial

5

Preload part, preload spring

5.1, 5.2

free end

5a, c

free ending leg

5a1, 5a2

extension

5b

connecting leg

6

Profile Part

6 '

profile direction

6a, c

free ending leg

6a1, 6a2

extension

6b

connecting leg

7

groove

8, 8 '

Board member

9

Profile Part

9a, c

free ending leg

9b

connecting leg

9a1, 9c1

extension

10

Longitudinal direction, axial direction

11

1. transverse direction

12

2nd transverse direction

13

receiving opening

13a

muzzle

14

Form-fitting recess

14a

inner circumference

15, 15 '

connecting web

16

metal strip

16a, b, c

transverse leg

16d, e, f

longitudinal leg

17

potting compound

18

cranking

19

Profile Part

19a, c

free ending leg

19a1, 19c1

extension

19b

connecting leg

20

drilling

21

recess

22.22 ', 22 "

flap

23

Rod part

23a

cranking

23b

deflection

24

Through opening

50

magnet

100

shaft journal

100 '

axial direction

100 '

cross-section

100a

outer periphery

100a1

flattening

A

distance

D

thickness

L

length

Claims (21)

Encoder unit (1) for attachment to a shaft journal (100) with a non-round, in particular round, but flattened, cross-section (100 ") with - a base body (3) having a receiving opening (13) for receiving the shaft journal (50), which extends in the axial direction (10, 100 '), - a particular cup-shaped magnet part (2) which comprises a donor element (50), in particular a donor magnet (50), characterized by - a positive connection part (4) with a form-fitting recess (14) with respect to the rotation about the perpendicular to the cross section (14 ") of the form-fitting recess (14) stationary axial direction (10) positive reception of the shaft journal (100) by the positive engagement recess (14) at least partially has an inner periphery (14a) matching the outer periphery (100a) of the shaft journal (100). Encoder unit Claim 1 , characterized in that the transmitter unit (1) is designed such that it on a shaft journal (100) with non-circular cross section alone by plugging in the axial direction (10) positively against rotation relative to the shaft journal (100) about the axial direction (10) is secured. Transmitter unit according to one of the preceding claims, characterized in that the receiving opening (13) for receiving the shaft journal (50) extends in the axial direction (10, 100 ') over a length (L) which is greater than its diameter (D). , (Form fit part separately) ( 1 - 3 ) Transmitter unit according to one of the preceding claims, characterized in that the positive-locking part (4) is designed as a separate U-shaped or C-shaped profile part (6) from the base body (3), - in its connecting leg (6b) In the mounted state, the connecting leg (6b) is located in front of the end face of the base body (3), in which the receiving opening (13) opens and from there the free-ending legs (6a, 6b) are punched out. c) of the profile part (6) extend in the longitudinal direction (10), - the profile part (6) is in particular dimensioned such that it can be pushed onto the base body (3) in a first transverse direction (11). Transmitter unit according to one of the preceding claims, characterized in that at a C-shaped profile part (6) at least one of the free ends of one of the free-ending legs (6c) in a circumferential, in the transverse direction (11) to the axial direction (10) extending recess, in particular groove (7). Transmitter unit according to one of the preceding claims, characterized in that in the case of a C-shaped profile part (6) at least one of the free ends of one of the free ends (6c) in the mounted state on the flattening (100 "a) of the shaft journal (100 ) is applied, in particular with bias voltage applied. ( 4a, b ) Transmitter unit according to one of the preceding claims, characterized in that the form-fitting part (4) is formed as a separate U-shaped plate part (8) from the base body (3), - in the assembled state, the one free ending leg (8a) with its inner narrow side in the mounted state abuts against the flattening (100 "a) of the shaft journal (100), - the other free ending leg (8c) with its inner narrow side on the bottom of a groove running in the 1st transverse direction (11) ( 7) of the base body (3), - the plate part (8) is in particular dimensioned so that it in the 1st transverse direction (11) on the base body (3), in particular form-fitting, can be pushed. Transmitter unit according to one of the preceding claims, characterized in that at least one of the free ending legs (8a, c) has a crank towards the center, which acts on the shaft journal (100) as a trigger-fuse. Transmitter unit according to one of the preceding claims, characterized in that the form-fitting part (4) is made of an elastic material, in particular spring steel. ( 5 . 6 ) Transmitter unit according to one of the preceding claims, characterized in that the form-fitting part (4) as the base body (3) separate U-shaped or C-shaped profile part (9, 19) is formed, which in the assembled state in the interior the receiving opening (13) is located - wherein in the assembled state of the connecting leg (9b, 19b) of the profile part (9, 19) on the outer periphery (100a) of the shaft journal (100), in particular form-fitting, is applied, - the profile part (9, 19) is dimensioned in particular so that it can be pushed into the receiving opening (13) in the longitudinal direction (10). Transmitter unit according to one of the preceding claims, characterized in that the freely ending limbs (9a, c, 19a, c) are designed to be elastic and, in the assembled state, extensions (9a1, 9c1, 19a1, 19c1) formed therein in openings of the wall of the receiving opening (9a, c). 13) are longitudinally fixed. Transmitter unit according to one of the preceding claims, characterized in that the profile direction (9 ') of the profile (9) in the mounted state corresponds to the longitudinal direction (10). Transmitter unit according to one of the preceding claims, characterized in that the profile direction (19 ') of the profile (19) corresponds to the transverse direction (11) to the longitudinal direction (10). (Trigger brake) Transmitter unit according to one of the preceding claims, characterized in that on the outer periphery (100a) of the shaft journal (100) abutting end portion of the positive connection part (4) counter to the direction of free movement with its free end to the outer periphery (100a) and the end region as sharp edge, in particular with a sharp edge angle is formed. (Base body with positive receiving opening) ( 8th . 9 ) Transmitter unit according to one of the preceding claims, characterized in that - the positive connection part (4) is formed integrally with the base body (3) as a base body positive connection part (3 + 4) by the receiving opening (13) of the base body ( 3) at the same time the positive connection recess (14). (Base body through hole) ( 10 ) Transmitter unit according to one of the preceding claims, characterized in that - the receiving opening (13) formed as a form-fitting recess (14) is a through-hole through the base body (3), in particular the base body form-fitting part (3 + 4) as an extrusion Profile is made. (Leader for game minimization, 8th . 9 . 10 ) Transmitter unit according to one of the preceding claims, characterized in that a biasing member (5), in particular a biasing spring (5), is provided, which generates a radical biasing force, with which it the outer periphery (100a) of the journal (100) against the Inner circumference (14 a) of the form-fitting recess (14) presses. ( 10 ) Transmitter unit according to one of the preceding claims, characterized in that base body (3), positive-locking part (4) and magnet part (2) are formed together as a one-piece overall part (2 + 3 + 4). (Magnet or magnet part separately) Transmitter unit according to one of the preceding claims, characterized in that - the encoder magnet (50), in particular the entire magnet part (2), on the base body (3) or on the base body-form-fitting part (3 + 4) against rotation is fastened, in particular positively fastened or glued, - in particular the encoder magnet (50) at least partially covers the mouth of the formed as a through hole form-fitting recess (14) and in particular serves as an axial stop for the shaft journal (100). Transmitter unit according to one of the preceding claims, characterized in that this total part (2 + 3 + 4) is produced by means of prototypes, in particular by means of a casting process, in particular by means of diecasting, or by means of an iterative production process, in particular by means of 3-D Pressure, preferably made of metal, or - is produced as a sheet-metal bent part with at least one positive-locking recess (14) punched out therein. ( 11 ) Transmitter unit according to one of the preceding claims, characterized in that - the overall part (2 + 3 + 4) produced as a sheet-metal bent part consists of a multi-cranked sheet-metal strip (16) which has a plurality of transverse limbs (16) spaced apart in the axial direction (10) a, b, c), - in each case one of two approximately mutually aligned positive locking openings (14) is present in two adjacent transverse legs (16a, b) and the third transverse leg (16c) serves as a stop for the shaft journal (100) , - in particular the form-fitting recesses 14) in the two adjacent transverse legs (16a, b) around the axial direction (10) have a non-zero minor angular offset from one another, so that on the one hand the shaft journal (100) can still be inserted through both on the other hand, the two transverse legs in the plugged state apply a bias about the axial direction (10) on the inserted shaft journal (100).

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