Pushbutton insert for a touch measuring device, especially for a 3D pushbutton, as well as touch measuring devices

Description

[0001] The invention relates to a stylus insert for a tactile measuring device, in particular a 3D stylus, as well as a tactile measuring device and a 3D stylus.

[0002] A touch probe, for example a multi-coordinate touch probe, also referred to simply as a 3D probe, which allows distance measurements both in the direction of a measuring axis and perpendicular to it, is known, for example, from WO 02 / 103282 A1.

[0003] This touch probe comprises a housing on which a probe lever, sometimes also called a probe arm, is slidably guided in the direction of a measuring axis defined by the housing. The probe lever is furthermore guided on the housing by means of a universal joint, for example, in the form of a ball joint as specified in WO 02 / 103282 A1, allowing it to pivot in all directions around a pivot point located on the measuring axis, and is spring-loaded by a return spring.

[0004] The probe lever has a probe insert protruding from the housing, often also referred to simply as a probe tip, the free end of which, formed by a probe ball, defines a probe reference point lying on the measuring axis in the rest position of the probe lever.

[0005] With respect to the pivot point, a coupling arm of the probe lever, also referred to as the measuring shaft of the probe lever, projects opposite to the probe insert into a circular cylindrical guide opening in the housing, centered on the measuring axis.

[0006] The stylus insert, which has a stylus ball, a pin which receives the stylus ball and a sleeve which is connected to the pin, is screwed to the coupling arm via a screw connection arrangement comprising a centering element and a threaded rod with external thread.

[0007] The stylus insert, in this case the sleeve of the stylus insert, is held at the other end of the stylus ball in a corresponding bore at the end of the centering element that points towards the stylus insert. The centering element has an internal thread at the other end of this bore, which is screwed into the threaded rod or its external thread. At the end of the threaded rod furthest from the stylus insert, it is screwed – via an external thread on the threaded rod – into an internal thread of the coupling arm.

[0008] A dial gauge held against the housing detects the position of the measuring shaft or probe relative to the housing.

[0009] Improper use of such a probe measuring device can damage the probe insert, for example, by causing it to break at the ceramic sleeve, which serves as a predetermined breaking point. In such cases, the probe insert must be replaced.

[0010] US patent 2018 / 0299061 A1 describes a quick-mounting device that enables an operator to quickly, reliably, and safely mount a laser scanner to a fixture. The quick-mounting device provides components to be connected, which can be mounted using threaded segments.

[0011] DE 10 2015 002 943 A1 discloses a collet chuck with a cap nut featuring a multi-start thread. CH 714 193 A2 discloses a core drill with a connecting element that provides a multi-start thread.

[0012] The purpose of the invention is to create a simple, cost-effective and quickly interchangeable coupling of a stylus insert in the stylus measuring device.

[0013] This problem is solved by a probe insert for a tactile measuring device, in particular a 3D probe, as well as a tactile measuring device and a 3D probe with the features of the respective independent claim. Advantageous embodiments of the invention are the subject of dependent claims and the following description.

[0014] Terms used, such as axial and radial, are to be understood – unless explicitly defined otherwise – in relation to a measuring axis of a touch probe comprising the objects according to the invention.

[0015] The coupling element according to the invention has at one end a pin forming a first connection / coupling area.

[0016] This pin forms several thread segments on an outer surface that are not adjacent to each other in the radial circumferential direction.

[0017] (Also) The screw insert according to the invention has at one end a first connection / coupling area, in particular for connection with the coupling element, - with a recess on the inner surface of which (also) several thread segments are formed which do not adjoin each other in the radial circumferential direction.

[0018] A thread segment (such as a coupling element or a screw insert) can be formed by one or more recesses, each forming part of a thread (partial thread), where the "raised areas" limiting such a recess or partial thread may be seen and described as thread flanks.

[0019] In simplified terms, - in the radial circumferential direction - between the thread segments (on the outer pin surface (in the case of the coupling element) or the inner recess surface (in the case of the screw insert)) there are thread-free areas or thread-free sections, hereinafter referred to simply and in simplified terms as interruptions, for example essentially smooth partial cylinder surfaces / shells.

[0020] In other words, on the pin surface or inner surface of the recess, the thread segments (visually external thread segments on the pin of the coupling element, or visually internal thread segments in the inner recess of the screw insert) and the unthreaded areas or interruptions alternate in a radial circumferential direction.

[0021] This proves advantageous in that a corresponding counterpart to the coupling element or screw insert, for example the screw insert to the coupling element or vice versa, can be easily and quickly coupled to it, for example by (quick) rotary coupling, i.e. by axial insertion and then (rotation).

[0022] In this process, during axial insertion / connection, the threaded segments of one element, for example the coupling element, or the external thread segments of the coupling element, "dive" into the interruptions of the other element (counter element), for example the screw insert (or vice versa, i.e., the internal thread segments of the counter element, for example the screw insert, dip into the interruptions of the element, for example the coupling element) - until they are then rotated against each other - whereby external thread segments and internal thread segments then interlock.

[0023] In short, the coupling element and screw insert can be quickly and easily connected and precisely clamped together using this rotary coupling mechanism. The connection – and thus the advantages of the coupling element and / or screw insert – proves to be more stable, better, especially faster, and backlash-free, with precise centering.

[0024] It is advantageous here if the gaps between the threaded segments are radially recessed relative to the threaded segments. To put it simply, the gaps between the threaded segments are located radially further inwards than the threaded segments in the coupling element, and radially further outwards than the threaded segments in the screw insert. This facilitates the axial insertion (of the element and mating element) or "immersion" (of the threaded segments into the gaps).

[0025] This rotary coupling can be further simplified if the thread segments of one element, for example the coupling element, and the interruptions of the mating element, for example the screw insert, are adapted to each other, particularly in their circumferential extent. That is, if the circumferential extent of the thread segments (of one element) is equal to or, in particular, less than the circumferential extent of the interruptions (of the mating element), then the element and mating element can be more easily moved axially relative to each other or engaged with one another.

[0026] It is particularly advantageous (whether for the coupling element or the screw insert) if the pitch profiles are the same for all the recesses forming the partial threads.

[0027] This allows for jam-free coupling of the coupling element or screw insert with a corresponding counterpart, for example, the coupling element and the screw insert.

[0028] Put simply, identical thread pitches ensure that each partial thread has the same "stroke". Otherwise, differing strokes can lead to jamming or make it difficult to engage the coupling element or screw insert with its counterpart.

[0029] However, the same gradient profiles can themselves be constant or change, in particular be degressive.

[0030] In particular, the degressive design of a partial thread enables (initially) rapid gripping when coupling the coupling element or screw insert with a corresponding counterpart, such as in rotary coupling (see above).

[0031] Furthermore, it can also be provided that (whether in the coupling element or the screw insert) the recesses forming the partial threads are designed in such a way that they do not form a common thread. In other words, to put it simply, all recesses or partial threads do not lie on a (conceivably continuous) common helix.

[0032] Furthermore, it can also be advantageous (whether in the coupling element or the screw insert) to have gaps between the partial threads of a thread segment.

[0033] To put it simply, partial threads of a thread segment do not directly border each other in the axial direction, but rather there are wider depressions between each pair of partial threads than the partial threads themselves.

[0034] This makes it easier for the external thread of the coupling element or the internal thread of the screw insert to mesh with the corresponding internal thread or external thread of the counterpart when the coupling element or screw insert is coupled with a corresponding counterpart.

[0035] It is particularly advantageous from a manufacturing perspective if (whether in the coupling element or the screw insert) at least two or more, especially all, thread segments are designed identically.

[0036] Preferably, three threaded segments, particularly those evenly distributed in the radial circumferential direction, may be arranged on the outer surface of the pin or on the inner surface of the recess. Four or more threaded segments, particularly those evenly distributed in the radial circumferential direction, may also be provided.

[0037] Preferably, these threaded segments can also be arranged at equal angles.

[0038] The same can then also apply to interruptions on the pin or on the inner surface of the recess.

[0039] Furthermore, it may also be provided that a recess having an internal thread is provided in the pin of the coupling element forming the first connection / coupling area.

[0040] This can, for example, be designed to couple the coupling element – ​​instead of via the threaded segments on the pin surface – with a different, alternative counterpart, such as a threaded rod, as provided for, for example, by the 3D probe in WO 02 / 103282 Al. The "original" coupling option of the coupling element via the threaded segments on the pin surface is thus retained; it is – to put it simply – supplemented by another option. The coupling element is therefore versatile. In other words, its interfaces are open and multi-compatible with 3D probes.

[0041] Furthermore, the coupling element – ​​at its other end – may have an additional pin forming a second connection / coupling area. This additional pin may also have a further recess. This further recess may, for example, serve to accommodate a stylus tip / insert. This tip / insert may, for example, be screwed and / or glued into it.

[0042] For example, it may be intended that a sleeve of a key insert be glued into this further recess.

[0043] It is also advantageous to provide a radially extending contact surface for axial planar contact on or near the coupling element (also referred to simply as planar contact). This surface can be oriented, in particular, towards the end of the pin forming the first connection / coupling area – and can also be designed to rest on a corresponding surface on a coupling arm / measuring shaft.

[0044] The coupling element may also have a substantially cylindrical section on the outer surface of which a radially circumferential bead, at least partially, in particular completely, is formed for radial centering (also referred to simply as centering, for example for centering the coupling element in a recess in the coupling arm / measuring shaft, in which recess the coupling element is / will be recessed).

[0045] This bulge can be formed on the outer surface of the pin, particularly after the pin forming the first connection / coupling area, especially between the flat surface and the pin forming the first connection / coupling area.

[0046] Furthermore, the coupling element may also include a section whose outer circumference has a non-circular cross-section. This non-circularity can be formed, in particular, by radially inner and radially outer regions.

[0047] Geometric shapes and cross-sections that deviate from a circle can be considered "non-circular".

[0048] Accordingly, it is also advantageous if an inner surface of a recess in the coupling arm / measuring shaft, in which the coupling element can be received or is / will be received, is designed to be complementary to the non-circular shape, and in particular also has radially more inward and radially more outward areas.

[0049] Thus, if the coupling element is to be received in the coupling arm / measuring shaft, it can be inserted into its recess and then rotated relative to the coupling arm / measuring shaft. When the radially outer areas of the coupling element, or the section of the coupling element, come into contact with the radially inner areas of the coupling arm / measuring shaft, or within the recess of the coupling arm / measuring shaft, or on the inner surface of the recess of the coupling arm / measuring shaft, the coupling element and the coupling arm / measuring shaft become clamped (i.e., the play is eliminated from the pairing) – and can thereby also be centered relative to each other.

[0050] It can also be advantageous if the screw insert has a pin at the other end forming a second connection / coupling area, on the outer surface of which an external thread is formed, or if the screw insert has a bore at the other end forming the second connection / coupling area 120 with an inserted (internal hexagon) screw.

[0051] Using this external thread or screw or its (external) thread, for example the screw insert with an internal thread provided on the coupling arm can be screwed to it.

[0052] The screw insert may also feature a diameter-reduced, essentially cylindrical intermediate section between the first and second connection / coupling areas. This allows the screw insert a degree of flexibility to compensate for any tolerances that may occur.

[0053] An axial flat contact surface and / or a centering feature can also be provided for the screw insert. In other words, the screw insert can be designed to have a radially extending contact surface for axial flat contact or a substantially cylindrical section for radial centering (for example, for centering the screw insert in a recess in the coupling arm / measuring shaft, in which recess the screw insert fits) – both specifically for contact and / or centering with respect to the measuring shaft / coupling arm.

[0054] Further development can also include a radially spring-like structure on an outer surface of the screw insert, particularly in the area of ​​the first connection / coupling area.

[0055] It can be advantageous, because it is simpler from a manufacturing perspective, if the axially spring-loaded structure is formed using spring clamping elements ("clip").

[0056] Accordingly, it may also be advantageous if an (engagement) structure is formed on an inner surface of a recess in the coupling arm / measuring shaft in which the screw insert can be received or is / will be received, in which this radially spring-loaded structure can be engaged on / of the screw insert.

[0057] It can be advantageous, because it is simple in terms of manufacturing, if the (snap-in) structure is formed by a radially circumferential groove on the inner surface of the recess in the coupling arm / measuring shaft.

[0058] By means of these simple structural elements - the axially spring-loaded structure of the screw insert and / or the (locking) structure of the coupling arm / measuring shaft - the screw insert can be easily and securely received and held in the coupling arm / measuring shaft.

[0059] If necessary, it is also advisable to design the screw insert here with an anti-rotation device relative to the coupling arm / measuring shaft.

[0060] The coupling arrangement according to the invention comprises the coupling element and the screw insert. Both can be designed, in particular, with the described embodiments.

[0061] It is particularly advantageous here if the threaded segments of the coupling element and the threaded segments of the screw insert are designed as corresponding, screwable internal / external threads (see above for rotary coupling).

[0062] The respective interruptions in the coupling element and screw insert can also be adapted to each other (see above for rotary coupling).

[0063] The connection of the coupling element and the screw insert is then achieved in particular by - rapid - rotary coupling (see above), i.e., by axially inserting the coupling element into the screw insert and then - mutually - rotating (against) it.

[0064] It is particularly useful to use the coupling element and / or the screw insert or the coupling arrangement to receive a probe tip in a touch probe, especially a 3D probe, so that the probe tip can be easily and quickly mounted (in the touch probe) or replaced (in the probe).

[0065] A touch probe according to the invention provides (at least) the screw insert, in particular according to the described embodiments, and a coupling arm / measuring shaft, wherein the screw insert and the coupling arm / measuring shaft are connected to each other, in particular screwed together or formed in one piece.

[0066] In particular, this connection between the screw insert and the coupling arm / measuring shaft can be achieved by the screw insert having a pin at its other end, forming the second connection / coupling area, on the outer surface of which the external thread is formed, and the coupling arm having the intended internal thread. The external thread of the screw insert and the internal thread of the coupling arm can then be screwed together.

[0067] Another touch probe according to the invention can also include the coupling element, in particular according to the described embodiments, a screw insert, in particular according to the described embodiments, a probe insert, in particular a probe insert having a stylus ball, a pin and a sleeve, and a coupling arm / measuring shaft, wherein the probe insert is connected to the coupling arm / measuring shaft by means of the coupling element and the screw insert connected to the coupling element.

[0068] Furthermore, the touch probe may also be designed so that the threaded segments of the coupling element and the threaded segments of the screw insert are formed as corresponding, screwable internal / external threads.

[0069] The respective interruptions can also be adapted to each other, so that the coupling element and the screw insert can be connected to each other by rotary coupling (see above).

[0070] As an alternative to the coupling element according to the invention which has the threaded segments, a (further) such element can also be provided which has at one end a pin forming a first connection / coupling area, on the outer surface of which (instead of the (several threaded segments spaced apart by the interruptions) a (continuous or uninterrupted) multi-start external thread is formed.

[0071] This alternative coupling element can also be further developed with the described further developments of the coupling element described above, which has thread segments, such as in particular the recess with internal thread or the further recess with the further internal thread, the flat contact or the centering.

[0072] The advantage of this alternative coupling element with its multi-start thread is that, when screwed in via this multi-start thread, for example in a touch probe, a greater axial feed / stroke can be achieved at the same angle of rotation (compared to single-start threads), which allows this coupling element to be screwed in faster than a conventional single-start threaded part.

[0073] If the connection of a probe insert is made via such an alternative coupling element having a multi-start thread in / on a probe measuring device, such a probe insert can be changed or replaced in a faster time.

[0074] The preceding description of advantageous embodiments of the invention contains numerous features, some of which are summarized in the individual subclaims. However, these features can also be expediently considered individually and combined into meaningful further combinations.

[0075] Even though some terms in the description or in the patent claims are used in the singular or in conjunction with a numeral, the scope of the invention for these terms is not to be limited to the singular or the respective numeral. Furthermore, the words "ein" and "eine" are not to be understood as numerals, but as indefinite articles.

[0076] The properties, features and advantages of the invention described above, as well as the manner in which they are achieved, will become clearer and more easily understood in connection with the following description of the exemplary embodiments of the invention, which will be explained in more detail in connection with the drawing(s) / figures (identical parts / components and functions have the same reference numerals in the drawings / figures).

[0077] The exemplary embodiments serve to illustrate the invention and do not limit the invention to the combinations of features specified therein, including functional features. Furthermore, suitable features of each exemplary embodiment can also be explicitly considered in isolation, removed from one exemplary embodiment, incorporated into another exemplary embodiment to supplement it, and / or combined with any one of the claims.

[0078] They show: FIG 1 a probe lever with a probe insert, a coupling element, a screw insert and a coupling arm / measuring shaft of a probe measuring instrument according to one embodiment of the invention; FIG 2 (in views 2-1, 2-2 and 2-3) a coupling element of a probe lever of a probe measuring instrument according to one embodiment of the invention; FIG 3 (in views 3-1, 3-2 and 3-3) a screw insert of a probe lever of a probe measuring instrument according to one embodiment of the invention; FIG 4 a section of a probe lever with a probe insert, a coupling element, a screw insert and a coupling arm / measuring shaft of a probe measuring instrument according to one embodiment of the invention; FIG 5 a probe lever with a probe insert, a coupling element, a screw insert and a coupling arm / measuring shaft of a probe measuring instrument according to a further embodiment of the invention; FIG 6 (in views 6-1, 6-2 and 6-3) shows a screw insert of a probe lever of a probe measuring device according to a further embodiment of the invention;FIG 7 a section of a probe lever with a clampable coupling element of a touch probe according to a further embodiment of the invention; FIG 8 a section of a probe lever with a clampable coupling element of a touch probe according to a further embodiment of the invention; FIG 9 a probe lever with a probe insert, a coupling element, a screw insert and a coupling arm / measuring shaft of a touch probe according to a further embodiment of the invention; FIG 10 a detail view of the coupling element, the screw insert and the coupling arm / measuring shaft of the touch probe according to a further embodiment of the invention; FIG 11 a section of the touch probe as shown in ; FIG 9 characterized, according to the further embodiment of the invention. - 3D probe insert / tip 8 with rotary coupling for a 3D probe 2 (Figs. 1 to 4)

[0079] Terms used here, such as axial and radial, are to be understood in relation to the measuring axis 82 of the 3D probe 2, unless explicitly defined otherwise.

[0080] The 3D button 2 comprises a housing 4 (not shown in the figures) to which a push-button lever 6 (cf. Fig. 1 , Fig. 4 ) is guided in the direction of a measuring axis 82 defined by the housing 4 in a displaceable manner.

[0081] The probe lever 6 is guided on the housing 4 by means of a universal joint 86, here in the form of a ball joint 86, so as to be pivotable in all directions about a pivot point lying on the measuring axis 82 and is spring-loaded by a return spring (not shown in the figures).

[0082] The push-button lever 6, like the Figure 1 and 4 show a stylus insert / tip 8 protruding from the housing, the free end of which is formed by a stylus ball 10 and defines a stylus reference point lying on the measuring axis 82 in the rest position of the stylus lever 6.

[0083] The push-button lever 6 includes, as the Figure 1 and 4to illustrate, in addition a coupling arm 80 which - with respect to the pivot point - projects in the opposite direction to the probe insert 8 or in the opposite direction 84 to the probe tip 8 into a circular cylindrical guide opening of the housing 4, centered on the measuring axis 82 (not shown in the figures).

[0084] Via a coupling element 16 (see Fig. 2 ) and a screw insert 116 connected to the coupling element 16 (see Fig. 3 ) coupling arrangement 216 is, as the Figure 1 and 4 To illustrate, the key insert 8, which, in addition to the stylus ball 10, has a (steel) pin 12, which receives the stylus ball 10 by means of a welded connection, and a (ceramic) sleeve 14, which in turn is connected to the pin 12, is screwed to the coupling arm 80.

[0085] This can be seen in more detail in connection with Fig. 2As described, the (mounted) coupling element 16 (then) has a recess 26b at its end pointing towards 84 to the probe tip 8, in the form of an axial bore open on one side (end side), which serves to receive the sleeve 14 of the probe insert 8.

[0086] How Fig. 2 (as shown in views 2-1, 2-2, 2-3, detail view of the coupling element 16), the coupling element 16 has a pin 24a at one end forming a first connection / coupling area 18.

[0087] This pin 24a forms several, in this case three, thread segments 28 in the form of external thread components 30 on an outer surface 60, which are not adjacent to each other in the radial circumferential direction 62, are evenly distributed in the radial circumferential direction 62 and are identical in themselves, and whose partial thread turns 30 all have the same, slightly degressive pitch profile 68 or in short the same, slightly degressive pitch 68.

[0088] That is, in the radial circumferential direction 62 are, as Fig. 2 The figure shows three threadless areas or sections, arranged in a radial circumferential direction 62 (alternating with the threaded segments 28), between the three threaded segments 28 (on the outer pin surface 60 at the coupling element 16), which are also evenly distributed in the radial circumferential direction 62 (alternating with the threaded segments 28), and are referred to below briefly and in simplified terms as interruptions 32, here in the form of smooth partial cylinder surfaces / shells.

[0089] This includes, as Fig. 2 as can also be seen, the three interruptions 32 in the radial circumferential direction 62 are each slightly longer than the three thread segments 28 - and, as Fig. 2 also illustrated, radially further inwards or radially recessed than the thread segments 28.

[0090] Furthermore, it shows how Fig. 2The pin 24a of the coupling element 16, which carries the external thread portions 30, has an axial recess 26a in the form of an axial bore open on one side (end side), in which an internal thread 34 is provided.

[0091] Furthermore, how Fig. 2 as illustrated, on the coupling element 16 - at the other end of the pin 24a carrying the thread segments 28 or the external thread parts 30 - a further pin 24b forming a second connection / coupling area 20 is provided.

[0092] This further pin 24b also provides a recess 26b, in the form of an axial bore open at one end, which serves (as shown in Figs. 1 and 4) to receive the sleeve 14 of the stylus insert 8. That is, the sleeve 14 of the stylus insert 8 is bonded in this recess 26b.

[0093] Furthermore, how Fig. 2The coupling element 16 shows a radially extending contact surface 36 directed towards the pin 24a carrying the thread segments 28 or the external thread portions 30 - on a radially outwardly extending flange-like projection 42 - for axial plan contact on a counter surface 44 on the coupling arm 80 (also referred to as plan contact).

[0094] The flange-like projection 42 looks like Fig. 2 It also features a knurling 46 on its outer circumferential surface for improved grip. A corresponding knurling 48 is also formed on the outer circumference of the further pin 24b (also for improved grip).

[0095] Furthermore, the coupling element 16 provides - axially between the pin 24a carrying the thread segments 28 or the external thread portions 30 and the flange-like projection 42 providing for planar contact - a substantially cylindrical section 38, on the outer surface of which a radially circumferential, radially outwardly curved bead 40 is formed for radial centering of the coupling element 16 in the coupling arm 80 (see Figs. 1 and 4) (also referred to as centering).

[0096] Fig. 3 shows (in views 3-1, 3-2, 3-3) the screw insert 116 in detail.

[0097] How Fig. 3 As shown, the screw insert 116 also has a first connection / coupling area 118 at one end.

[0098] This first connection / coupling area 118 has an axial recess 124 in the form of an axial bore open at one end, on the inner surface 70 of which several, in this case three, thread segments 126 in the form of internal thread portions 128 are formed, which are not adjacent to one another in the radial circumferential direction 62, are evenly distributed in the radial circumferential direction 62 and are identical in themselves, and whose partial thread turns 128 all have the same slightly degressive pitch profile 68 or, in short, the same slightly degressive pitch 68.

[0099] That is, in the radial circumferential direction 62 are, as Fig. 3Figure 1 shows three thread-free areas or thread-free sections, arranged in the radial circumferential direction 62 (alternating with the thread segments 126), which are also evenly distributed in the radial circumferential direction 62 (alternating with the thread segments 126), and are referred to below briefly and simply as interruptions 130, here in the form of smooth partial cylinder surfaces / coats.

[0100] This includes, as Fig. 3 as can also be seen, the three interruptions 130 in radial circumferential direction 62 are each slightly longer than the three thread segments 126 - and, as Fig. 3 also illustrated, radially further outwards or radially recessed compared to the thread segments 126.

[0101] In short, the first connection / coupling area 118 of the screw insert 116 is designed as a complementary, coupling counterpart / element to the first connection / coupling area 18 of the coupling element 16 - or - the recess 124 of the screw insert 116, which carries the thread segments 126, is designed as a complementary, coupling counterpart / element to the pin 24a of the coupling element 16, which carries the thread segments 28.

[0102] As will be described, these complementary elements allow the coupling element 16 and the screw insert 116 to be connected to each other in a simple and quick way - by rotary coupling.

[0103] Furthermore, how Fig. 3 As illustrated, on the screw insert 116 - on the other end of the recess 124 which carries the thread segments 126 or the internal thread parts 128 - a pin 122 forming a second connection / coupling area 120 is provided.

[0104] An external thread 134 is provided on the outer surface 140 of the pin 122, via which the screw insert 116 can be screwed into the coupling arm 80 (there in an internal thread 88) (see Figs. 1 and 4).

[0105] Furthermore, how Fig. 3 shows (and Fig. 4 (illustrates), - similar to the coupling element 16 - on the screw insert 116 a radially extending contact surface 136 directed in the direction of the pin 122 carrying the external thread 134 - on a radially outwardly extending flange-like projection 142 - provided for axial contact with a counter surface 144 on the coupling arm 80.

[0106] Furthermore, the screw insert 116 - axially between the pin 122 carrying the external thread 134 and the flange-like projection 142 providing the contact - provides an essentially cylindrical section 138 for radial centering in the coupling arm 80.

[0107] How Fig. 3As also shown, the screw insert 116 further has a diameter-reduced, essentially cylindrical intermediate area 132 - axially between the first and the second connection / coupling area 118, 120 or axially between the flange-like projection 142 and the first connection / coupling area 118 of the screw insert 116 - which allows the screw insert 116 to have a certain flexibility in order to compensate for any tolerances that may occur.

[0108] The button insert 8 can be mounted using the screw insert 116 which is screwed into the coupling arm 80.

[0109] For this purpose, the screw insert 116 can be screwed into the coupling arm 80 (there in an internal thread 88) via the external thread 134 provided on the outer pin surface 140 (see Figs. 1 and 4).

[0110] To fix the button insert 8, which is connected to the coupling element 16 via its sleeve 14, to the coupling arm 80 (see Figs. 1 and 4), the pin 24a of the coupling element 16, which has the threaded segments 28 with the external thread portions 30, is axially inserted / slid into the recess 124 of the screw insert 116, which has the threaded segments 126 with the internal thread portions 128 (until the axial flat contact surface 36 comes into contact with the counter surface 44 of the coupling arm 80), whereby the threaded segments 28 of the coupling element 16 engage in the breaks 130 of the screw insert 116 (or vice versa (32 / 126)), and then by "twisting against each other" (here the external and internal thread portions 30, 128 of the Threaded segments 28, 126 interlocked) - and thus coupled or held / fixed (rotary coupling).

[0111] This plug-and-turn sequence, or the rotary coupling of coupling element 16 and screw insert 116, which is to be carried out when mounting the button insert 8 into the 3D button 2, does not require lengthy screwing, as is necessary with the 3D button from WO 02 / 103282 A1 - with its centering element and threaded rod - and thus enables a simple and quick exchange or quick and easy assembly of the button insert 8 in the 3D button 2. - 3D probe insert / tip 8 with rotary coupling for a 3D probe 2 with screw insert 116 as "clip" (Figs. 5 to 6)

[0112] Terms used here, such as axial and radial, are to be understood in relation to the measuring axis 82 of the 3D probe 2, unless explicitly defined otherwise.

[0113] Fig. 5 shows a tactile lever 6 of a 3D probe 2 with a tactile insert 8, a coupling element 16, a coupling arm / measuring shaft 80 and an alternative screw insert 116.

[0114] Fig. 6(in views 6-1, 6-2 and 6-3) shows this alternative screw insert 116 in detail.

[0115] The button insert 8 and the coupling element 16 are identical to the previously described design (according to the Figures 1 to 4 ) designed; the coupling arm / measuring shaft 80 and the screw insert 116 largely correspond to the design described above, especially as far as the rotary coupling of coupling element 16 and screw insert 116 is concerned.

[0116] The following design of the lever (according to the figures) differs from the previously described lever 6 (according to the figures 1 to 4). Figures 5 to 6 ) "only" with regard to the mounting of the screw insert 16 in the coupling arm / measuring shaft 80.

[0117] Due to the extensive similarity of the two versions, for the sake of simplicity, the description of identical elements in both versions is omitted here (below) – and reference is made to the explanations of the previously described version. In particular, identical parts / components and functions have the same reference symbols in the drawings / figures.

[0118] As the Figures 5 and 6 As shown, the alternative screw insert 116 provides a radially spring-like structure 148 on the outer surface 146 of the screw insert 116, which is formed in the area of ​​the first connection / coupling area 118.

[0119] This axially resilient structure 148 is, in particular, the Fig. 6 illustrated by means of - here three - spring clamping elements 150 formed ("clip").

[0120] What next? Fig. 5then shows that on the inner surface 92 of the recess 90 in the coupling arm / measuring shaft 80, in which the screw insert 116 is received, a (snap-in) structure 94 - here in the form of a radially circumferential groove 96 on the inner surface 92 of the recess 90 in the coupling arm / measuring shaft 80 - is formed, in which groove 96 this radially spring-loaded structure 148 or the spring clamping elements 150 can snap into place.

[0121] By means of these simple structural elements - radially spring-loaded structure 148 or spring clamping elements 150 of the screw insert 116 and (locking) structure 94 or groove 96 of the coupling arm / measuring shaft 80 - the screw insert 116 can be securely received and held in the coupling arm / measuring shaft 80 in a simple way. - 3D probe insert / tip 8 with coupling elements 16 clamped in the coupling arm / measuring shaft 80 (Figs. 7 and 8)

[0122] Terms used here, such as axial and radial, are to be understood in relation to the measuring axis 82 of the 3D probe 2, unless explicitly defined otherwise.

[0123] Figures 7 and 8 show – in sectional views – embodiments of the coupling elements 16 described above (received in the coupling arm / measuring shaft 80), which further provide a clamping action by means of their surfaces in the coupling arm / measuring shaft 80 or in the recess 90 of the coupling arm / measuring shaft 80 (moreover, these coupling elements 16, as well as the coupling arms / measuring shafts 80 that receive them, can be or are designed according to the embodiments described above).

[0124] As Figures 7 and 8 illustrate, such coupling elements 16 have a section 38 whose outer circumference is non-circular in cross-section. This non-circularity is formed, as Figures 7 and 8 show, (in both cases) by radially inward and radially outward located areas 50, 52.

[0125] This "non-round" sub-area 38 is attached to the respective coupling element 16 (after Fig. 7 and Fig. 8) arranged between the planar system 36 and the pin 24a forming the first connection / coupling area 18 (see, for example, Fig. 2 ).

[0126] Fig. 7 Figure 16 shows a coupling element in which - to form the non-roundness or the radially inner and radially outer areas 50, 52 - the outer circumference of the sub-area 38 has three interconnected "flatter" circular arcs 54 in cross-section, i.e., whose radii of curvature are greater than half the circle diameter.

[0127] Fig. 8 Figure 16 shows a similar coupling element in which the outer circumference of the sub-area 38 connects three circular arcs 54 (of a common circle, i.e. with the same radius) in cross-section via straight circular chords 56 interspersed between them.

[0128] Corresponding to these "non-circular" sub-areas 38 of the coupling elements 16, correspondingly complementary "non-circular" structures are formed on the inner surfaces 92 of the recesses 90 in the coupling arms / measuring shafts 80. That is, these also have radially more inward and radially more outward areas 50, 52.

[0129] Fig. 7 Figure 1 shows a coupling arm / measuring shaft 80, the recess 90 of which has three interconnected "flatter" circular arcs 54 on its inner surface 92 in cross-section (towards the partial area 38 of the coupling element 16), which are somewhat larger (so that - with a "concentric" arrangement / alignment of coupling arm / measuring shaft 80 and coupling element 16 - a play (necessary for the rotation (tensioning)) forms / can form between coupling arm / measuring shaft 80 and coupling element 16).

[0130] Fig. 8shows a coupling arm / measuring shaft 80, the recess 90 of which has three interconnected circular arcs 54 - three radii of the same circles with shifted centers - on its inner surface 92 in cross-section (beginnings of the circular arcs 54 marked by circles K).

[0131] In both cases according to Figs. 7 and 8, radially inward and radially outward areas 50, 52 are formed on the outer surface of the section 38 of the respective coupling element 16 as well as on the inner surface 92 of the recess 90 of the respective coupling arm / measuring shaft 80.

[0132] Thus, if the coupling element 16 is to be received in the coupling arm / measuring shaft 80, it can be inserted into its recess 90 and then rotated relative to the coupling arm / measuring shaft 80. When the radially outer areas 50, 52 of the coupling element 16, or the section 38 of the coupling element 16, come into contact with the radially inner areas 50, 52 of the coupling arm / measuring shaft 80, or in the recess 90 of the coupling arm / measuring shaft 80, or on the inner surface 92 of the recess 90 of the coupling arm / measuring shaft 80, the coupling element 16 and the coupling arm / measuring shaft 80 become clamped together. - 3D probe insert / tip 8 with rotary coupling for a 3D probe 2 (Figs. 9 to 11)

[0133] Terms used here, such as axial and radial, are to be understood in relation to the measuring axis 82 of the 3D probe 2, unless explicitly defined otherwise.

[0134] Fig. 9shows a sensing lever 6 of a 3D probe 2 with a sensing insert 8, a coupling element 16, an alternative (slightly modified) coupling arm / measuring shaft 80 and an alternative (slightly modified) screw insert 116.

[0135] Fig. 10 shows a detailed section of this 3D probe 2 with alternative screw insert 116.

[0136] Fig. 11 shows a section - along the in Fig. 9 The section line marked FF on this 3D probe 2 with alternative screw insert 116.

[0137] The button insert 8 and the coupling element 16 are identical to the previously described design (according to the Figures 1 to 4 ) formed; the coupling arm / measuring shaft 80 and the screw insert 116 largely correspond to the design described above, in particular as far as the rotary coupling of coupling element 16 and screw insert 116 is concerned (threaded segments 28, 126 (see Figs. 2 and 3)).

[0138] Differences - compared to the previously described lever 6 (according to Figures 1 to 4) - are shown in the following version of the lever 6 (according to the Figures 9 to 11 ) "only" with regard to the mounting of the screw insert 16 in the coupling arm / measuring shaft 80 and the axial planar contact of the axial planar contact surface 36 of the coupling element 16.

[0139] Due to the extensive similarity of the two versions, for the sake of simplicity, the description of identical elements in both versions is omitted here (below) – and reference is made to the explanations of the previously described version (according to Figures 1 to 4). In particular, identical parts / components and functions have the same reference numerals in the drawings / figures.

[0140] How in particular the Figure 9 and 10As shown, the alternative screw insert 116 provides a bore 152 with an inserted (internal hexagon) screw 122 at the screw insert 116 - at the other end of the recess 124 which carries the thread segments 126 or the internal thread parts 128.

[0141] By means of this (internal hexagon) screw 122 - and its external thread 134 - the screw insert 116 is screwed into the coupling arm 80 (there in the internal thread 88) (see Figs. 9 and 10).

[0142] Furthermore, as also shown in Figs. 9 and 10, the opposite end of the screw insert 116, which has the bore 152 and the screw 122, forms a radially extending contact surface 136 for axial contact with the counter surface 144 on the coupling arm 80.

[0143] Furthermore, the screw insert 116 provides here a substantially cylindrical section 138 for radial centering in the coupling arm 80.

[0144] As further illustrated in Figs. 9 and 10, the radially extending contact surface 36 of the radially outwardly extending flange-like projection 42 of the coupling element 16, directed towards the pin 24a carrying the thread segments 28 or the external thread portions 30, rests against a counter surface 44 on the screw insert 116 (flat contact - see above) (cf. according to the embodiment according to Figs. 1 to 4, this flat contact 36 / 44 took place between coupling element 16 and coupling arm 80).

[0145] A (further) planar contact between screw insert 116 and coupling arm 80 then takes place, as shown in Figs. 9 and 10, via a planar contact surface 156 on the screw insert 116 and a counter surface 154 on the coupling arm 80.

[0146] In short and clear terms, where, after the execution of the key lever 6, the Figs. 1 to 4The plan connection is achieved by means of a flange-like structure 158 – provided as a single piece on the coupling arm 80 – between coupling element 16 and coupling arm 80 (see plan 44 / 36). Fig. 4 ), in the design of the tactile lever 6 according to Figs. 9 to 11, this flange-like structure 158 is formed integrally on the screw insert 116, whereby on the one hand a first planar contact 44 / 36 is formed between coupling element 16 and screw insert 116 and on the other hand a second planar contact 154 / 156 is formed between screw insert 116 and coupling arm 80.

[0147] Here too, using these simple structural elements on the screw insert 116, the screw insert 116 can be easily and securely received and held in the coupling arm / measuring shaft 80.

[0148] Notwithstanding the embodiments described above, in particular those shown in Figures 1 to 4, 7 to 8 and 9 to 11, elements of one embodiment can be combined with elements of another embodiment. For example, the screw insert 116 with separate screw 122 (according to the embodiment shown in Figures 9 to 11) and contact surfaces 44 / 36 (according to the embodiment shown in Figures 9 to 11) can be combined with other embodiments. Fig. 4 ) are combined with each other at a further tactile lever 6 of a 3D tactile probe 2.

[0149] In this combined embodiment, the screw insert 116 may wobble slightly if the screw 122 is not fully tightened, so that the centering of the coupling arm 16 is not affected.

[0150] Although the invention has been further illustrated and described in detail by the preferred embodiments, the invention is not limited by the disclosed examples and other variations can be derived from them. Reference symbol list:

[0151] 2 Probe, 3D probe 4 Housing 6 Probe lever, probe arm 8 Probe insert, probe tip 10 Probe ball (probe reference point) (welded to steel pin 12) 12 (Steel) pin (bonded in ceramic sleeve 14) 14 (Ceramic) sleeve (screwed and bonded in coupling element 16) 16 Coupling element (for quick-release coupling probe insert 8 - coupling arm / measuring shaft 80, coupled with screw insert 36) 18 First connection / coupling area, first screw area (coupling with screw insert 116) 20 Second connection / coupling area, second screw area (connection with probe insert / probe tip 8 or ceramic sleeve 14) 24a Threaded stud (one end) (with threaded segments 28) 24b Further threaded stud (other end) (with recess 26b for sleeve 14) 26a Further recess (at the first connection area 18 for internal thread 34 for screw connection with existing threaded rod) 26b Recess (at the second connection area 20 for sleeve 14) 28 Threaded segment (on the stud 24a) for (quick) coupling with screw insert 36) 30 Recess, partial thread, external thread portion (at threaded segment 28) 32 Interruption, recess (between thread segments 28) 34 Internal thread (in recess 26a in pin 24a for screw connection with existing threaded rod) 36 Contact surface for axial flat contact (axial flat contact surface) 38 Essentially cylindrical section (for radial centering) 40 Bead 42 Flange-like projection (with flat contact surface) 44 Counter surface (on coupling arm 80 / on screw insert 116 for flat contact surface 36) 46 Grooving 48 Grooving 50 Radially further inward area (of the non-circular structure) 52 radially outer area (of the non-circular structure) 54 arc of a circle 56 chord of a circle 60 outer surface (of the pin 24a) 62 radial circumferential direction 68 slope profile 70 inner surface (in recess 124) 80Coupling arm, measuring shaft 82Measuring axis 84Direction of probe tip 86Universal / ball joint 88Internal thread 90Recess (in coupling arm 80 for coupling element 16 and screw insert 116) 92Inner surface (in recess 90 (with non-circular structure)) 94(Snap-in) structure 96Radially circumferential groove 116 Screw insert (for quick-release coupling probe insert 8 - coupling arm / measuring shaft 80, coupled with coupling element 16) 118 First connection / coupling area, first screw area (coupling with coupling element 16) 120 Second connection / coupling area, second screw area (connection with coupling arm / measuring shaft 80) External thread (for screw connection with coupling arm / measuring shaft 80) 122 Threaded pin or screw (with external thread 134 for screw connection with / in coupling arm / measuring shaft 80) 124 Recess (at / in the first connection area 118 for threaded segments 126) 126 Threaded segment (for (quick) coupling with coupling element 16) 128 Recess, partial thread, internal thread portion (at threaded segment 126) 130 Interruption, recess (between threaded segments 126) 132 Diameter-reduced intermediate section (between the first and the second connection / coupling area 118, 120 (flexibility)) 134 External thread 136 Contact surface for axial contact (axial contact surface) 138 Essentially cylindrical section (for radial centering) 140 Outer surface (of the pin 122 or the screw 122) 142 Flange-like projection (with attachment), attachment 144 Counter surface (on coupling arm 80 for attachment surface 136) 146 Outer surface of the screw insert 116 in the area of ​​the first connection / coupling area 148 Radially resilient structure 150 Spring clamping elements 152 Bore 154 Counter surface (on coupling arm 80 for flat contact surface 156) 156 Contact surface (on screw insert 116 for axial flat contact (axial flat contact surface)) 216Clutch arrangement, rotary coupling F-cut

Claims

1. Probe insert for a measuring probe (2), in particular a 3D probe (2), having a coupling element (16) for receiving a probe tip (8) in a measuring probe (2), in particular a 3D probe (2), having a pin (24a) forming a first connection / coupling region (18) at one end and a further pin (24b) forming a second connection / coupling region (20) at the other end, characterized in that a plurality of threaded segments (28) which do not adjoin one another in the radial circumferential direction (62) are formed on an outer surface (60) of the pin (24a) and a probe tip (8) is received in the further pin.

2. Probe insert according to the preceding claim, characterized in that the threaded segments (28) are each formed by one or more depressions (30) which each form a part of a thread, with gradient profiles (68) being the same for all the depressions (30) forming the partial threads, in particular in that the same gradient profiles (68) are constant or in that the same gradient profiles change, in particular are degressive.

3. Probe insert according to any of the preceding claims, characterized in that gaps are formed between the partial threads of a threaded segment (28).

4. Probe insert according to any of the preceding claims, characterized in that at least two or more, in particular all, of the threaded segments (28) are the same.

5. Probe insert according to any of the preceding claims, characterized by three threaded segments (28), in particular arranged uniformly in the radial circumferential direction (62) on the outer surface (60) of the pin (24a).

6. Probe insert according to any of the preceding claims, characterized in that a recess (26a) having an internal thread (34) is provided in the pin (24a) forming the first connection / coupling region (18).

7. Probe insert according to any of the preceding claims, characterized by a radially extending contact surface (36) on the coupling element (16) for axial planar contact and / or a partial portion (38) on the coupling element (16), the outer circumference of which is non-circular in cross section, in particular formed by regions (50), (52) located radially further inward and radially further outward.

8. Probe insert according to any of the preceding claims, characterized by a substantially cylindrical portion (38) on the coupling element (16), on the outer surface of which a bead (40) for radial centering is formed, which bead extends at least partially, in particular completely, in the radial circumferential direction and is curved radially outward.

9. Measuring probe (2), in particular a 3D probe (2), characterized by a screw insert (116) having a first connection / coupling region (118) formed at one end, in particular for connection with a coupling element (16) of a probe insert according to any of the preceding claims, having a recess (124), on the inner surface (70) of which a plurality of threaded segments (126) which do not adjoin one another in the radial circumferential direction (62) are formed, and a coupling arm / measuring shaft (80), the screw insert (116) and the coupling arm / measuring shaft (80) being connected to one another, in particular screwed together or formed in one piece.

10. Measuring probe (2) according to any of the preceding measuring probe claims, characterized in that the threaded segments (126) are each formed by one or more depressions (128) which each form a part of a thread, with gradient profiles (68) being the same for all the depressions (128) forming the partial threads, in particular in that the same gradient profiles (68) are constant or in that the same gradient profiles change, in particular are degressive.

11. Measuring probe (2) according to any of the preceding measuring probe claims, characterized in that the depressions (128) forming the partial threads do not form a common thread and / or in that gaps are formed between the partial threads of a threaded segment (126).

12. Measuring probe (2) according to any of the preceding measuring probe claims, characterized in that at least two or more, in particular all, of the threaded segments (126) are the same.

13. Measuring probe (2) according to any of the preceding measuring probe claims, characterized by three threaded segments (126), in particular arranged uniformly in the radial circumferential direction (62) on the inner surface (70) of the recess (124).

14. Measuring probe (2) according to any of the preceding measuring probe claims, characterized by a pin (122) forming a second connection / coupling region (120) at the other end, on the outer surface (140) of which pin an external thread (134) is formed, or a hole (152) forming a second connection / coupling region (120) at the other end with an inserted screw (122) and / or by a diameter-reduced, substantially cylindrical intermediate region (132) between the first and the second connection / coupling region (118), (120).

15. Measuring probe (2) according to any of the preceding measuring probe claims, characterized by a radially extending contact surface (136) for axial planar contact and / or by a substantially cylindrical portion (138) for radial centering.

16. Measuring probe (2) according to any of the preceding measuring probe claims, characterized by a radially resilient structure (148) on an outer surface (146) of the screw insert (116), in particular in the region of the first connection / coupling region (118), the radially resilient structure (148) in particular being formed by means of spring clamping elements (150).

17. 3D probe (2), characterized by a coupling element (16) for receiving a probe tip (8) in the 3D probe (2), having a pin (24a) forming a first connection / coupling region (18) at one end, on the outer surface (60) of which pin a plurality of threaded segments (28) which do not adjoin one another in the radial circumferential direction (62) are formed, a screw insert (116) having a first connection / coupling region (118) formed at one end for connection with the coupling element (16) having a recess (124), on the inner surface (70) of which a plurality of threaded segments (126) which do not adjoin one another in the radial circumferential direction (62) are formed, a probe insert (8), in particular a probe insert (8) having a probe ball (10), a pin (12) and a sleeve (14), and a coupling arm / measuring shaft (80), the probe insert (8) being connected to the coupling arm / measuring shaft (80) by means of the coupling element (16) and the screw insert (116) that is connected to the coupling element (16), in particular characterized in that the threaded segments (28) of the coupling element (16) and the threaded segments (126) of the screw insert (116) are formed as corresponding, screwable internal / external threads.