Follower for position measuring device

Abstract

To provide an entrained body for a position determination device, wherein the entrained body has a structure flexible and suitable for a cable of a scanning unit of the position determination device.SOLUTION: An entrained body (16) for a position determination device is formed to hold a scanning part (14) of the position determination device. The entrained body (16) has an opening (17) for accommodating a cable (14.1) of the scanning part (14) and guiding it therethrough. The opening (17) extends penetrating at least part of the entrained body (16).SELECTED DRAWING: Figure 5a

Description

[Technical Field]

[0001] The invention relates to a follower for a position measuring device according to the preamble of claim 1 . [Background technology]

[0002] Patent Document 1 discloses a position measuring device, particularly a length measuring device. The position measuring device includes a scale in a casing that houses the scale, and a scanning unit that scans the scale. The scanning unit is connected to a follower. The follower can be fixed to a measurement object.

[0003] Another length measuring device with a follower is known from DE 10 2004 01 149 A1. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] European Patent Application Publication No. 2781890 [Patent Document 2] German Patent Application Publication No. 2729708 Summary of the Invention [Problem to be solved by the invention]

[0005] SUMMARY OF THE INVENTION It is an object of the present invention to provide a follower for a position measuring device, which follower is flexible and has a structure that is adapted to the cable of the scanning unit of the position measuring device. [Means for solving the problem]

[0006] According to the invention, this problem is solved by a follower for a position measuring device having the features of claim 1 .

[0007] The follower according to the invention is designed to hold a scanning unit of a position measuring device, the follower having an opening for receiving and guiding a cable of the scanning unit therethrough, the opening extending through at least a portion of the follower.

[0008] The follower is particularly formed in such a way that the cable can be guided through at least a portion of the follower (for example the sword-shaped central portion), and therefore comprises a cable passage for the cable of the scanning unit.

[0009] The follower preferably has an adapter piece for connecting the scanning unit to the follower, which allows the scanning unit to be aligned or adjusted relative to the scale, with the adjustment or alignment being possible in multiple degrees of freedom (e.g., spacing / parallelism, moiré angle, and / or height).

[0010] Preferably, the follower has a recess in its longitudinal part for laterally inserting the cable into the follower.

[0011] the follower has a closing element corresponding to the recess; the closure element is detachably connected to a complementary part of the entrainer relative to the closure element; the entrainer having a first inner contour; the closure element having a second inner contour opposing the first inner contour; the first inner contour and the second inner contour each extend through the longitudinal extension of the follower; and Advantageously, the first inner contour and the second inner contour form an opening for receiving and guiding a cable therethrough.

[0012] Furthermore, the closure element is advantageously configured to provide strain relief for the cable in the connected state.

[0013] Preferably, the opening has a circular, square or rectangular cross section.

[0014] Claim 15 describes a position measuring device with a follower according to the invention. The position measuring device is in particular an encapsulated length measuring device with a one-part or two-part casing.

[0015] The invention achieves an adaptation of the follower to the cable (e.g., geometry, shape) of the scanning unit. For this purpose, the follower is provided, in particular, with a cable passage in the form of an opening. The follower is advantageously suited for precisely accommodating and guiding the cable through. In contrast to conventional designs, in which flexible conductors are typically used as holders for connecting lines, the invention in particular allows for the use of larger dimensions (i.e., larger cable diameters or larger cable sizes). On the other hand, this allows for a flexible configuration of the follower. In addition, the invention makes it possible to connect the cable of the scanning unit to a plug-in connection that is provided separately from the follower.

[0016] Advantageous developments of the invention can be found in the dependent claims.

[0017] Further details and advantages of the invention are explained on the basis of the following description of possible embodiments of the invention in conjunction with the drawings. [Brief explanation of the drawings]

[0018] [Figure 1] 1 illustrates a perspective view of an exemplary position measuring device. [Figure 2] 2 shows a cross-sectional view of the position measuring device according to FIG. [Figure 3a] 2 shows a perspective view of the terminal end side of the position measuring device according to FIG. 1; [Figure 3b] 2 shows a perspective exploded view of the terminal end side of the position measuring device according to FIG. 1; [Figure 4] 2 shows a cross section of the end side of the position measuring device according to FIG. 1 in the region of the second (upper) sealing cord. [Figure 5a] 2 shows a perspective view of the driver of the position measuring device according to FIG. 1; [Figure 5b] 5b shows a perspective view of the follower according to FIG. 5a, with the closure element detached from the complementary part of the follower; [Figure 6a] 5b shows a plan view of the follower according to FIG. 5a to specifically show the L-shaped portion. FIG. [Figure 6b] 5b shows a cross section of the follower according to FIG. 5a in the central region of the follower; [Figure 7] 5b shows a perspective view of the closure element according to FIG. [Figure 8] 2 shows an exploded perspective view of the position measurement device according to FIG. 1. DETAILED DESCRIPTION OF THE INVENTION

[0019] Identical or functionally identical elements are provided with the same reference symbols in the figures.

[0020] An embodiment will be described below with reference to Figures 1 to 8. The position measuring device according to the embodiment comprises a base body 1 (e.g. a machine bed or a base body of a machine), a first casing part 10.1 extending in the longitudinal direction X and connected to the base body 1, and a second casing part 10.2 extending in the longitudinal direction X and connected to the base body 1 (see Figure 8). At least the first and second casing parts form a hollow profile (see Figure 2). The position measuring device comprises a scale 12 arranged inside the hollow profile 10 and a scanning unit 14 facing the scale 12 for scanning the scale 12. The base body 1 and the scale 12 are directly connected to each other.

[0021] 2, the scale 12 is adjacent to the mounting surface 1.1 of the base body 1. The mounting surface 1.1 is the surface of the base body 1 that faces the scale 12.

[0022] The position measuring device is in particular a length measuring device. To this end, the scale 12 and the scanning unit 14 are movable relative to one another in the longitudinal direction X (i.e. the measuring direction). During the position measurement, the scanning unit 14 scans the measuring graduation of the scale 12 and forms the position measurement value therefrom. The measuring graduation is not depicted in the figures.

[0023] The base body 1 and the first casing part 10.1 are directly connected to each other via fastening screws. One of these fastening screws (fastening screw 4.11) is visible in FIG. 2. Furthermore, the base body 1 and the second casing part 10.2 are directly connected to each other via fastening screws 4.2. One of these fastening screws 4.2 (fastening screw 4.21) is visible in FIG. 2. The fastening screw 4.21 is assigned to the fastening screw 4.11, i.e., the fastening screws 4.11, 4.21 are arranged one above the other in the Z direction. The Z direction extends parallel to the mounting surface 1.1 of the base body 1 and perpendicular to the longitudinal direction X. In the following, the Z direction will also be referred to as the "first direction."

[0024] Directly connected to each other means that the respective elements are connected to each other directly, i.e., without one or more intermediate elements.

[0025] With reference to Figure 2, the hollow profile 10 is entirely formed by the base body 1, a first casing part 10.1 and a second casing part 10.2. The position measuring device has a first sealing lip 18.1 and a second sealing lip 18.2 (hereinafter referred to as sealing lip 18) (extending in the longitudinal direction X). The sealing lip 18 is arranged at the lower end of the hollow profile 10. A follower 16, which holds the scanning unit 14, grips between the sealing lips 18. Further details of the follower 16 will be described below in connection with Figures 5 to 7 (or 8).

[0026] 2, the sealing lips 18 face each other in the Y direction, which extends perpendicular to the mounting surface 1.1 of the base body 1. In the following, the Y direction will also be referred to as the "second direction".

[0027] With reference to FIG. 2, the first casing part 10.1 has a first portion 10.11 for fixing the first casing part 10.1 to the base body 1. Furthermore, the second casing part 10.2 has a second portion 10.21 facing the base body 1 for fixing the second casing part 10.2 to the base body 1. The first portion 10.11 is arranged on a first (lower) side of the scale 12. The second portion 10.21 is arranged on a second (upper) side of the scale 12 opposite the first side. The first portion 10.11 and the second portion 10.21 are arranged opposite each other in a first direction (i.e., the Z direction). As shown in FIG. 2, the fixing screw 4.11 extends through the first portion 10.11. Furthermore, the fixing screw 4.21 extends through the second portion 10.21. The two-part casing formed by the first and second casing parts 10.1, 10.2 therefore extends on either side of the scale 12 up to the base body 1 and surrounds the scale 12 above and below.

[0028] The position measurement device has first to fourth sealing elements 20.1 to 20.4 (see FIGS. 2 and 8). As shown in FIG. 2, the first casing part 10.1 has a first recess 11.1 adjacent to the base body 1 for accommodating the first sealing element 20.1. Furthermore, the second casing part 10.2 has a second recess 11.2 adjacent to the base body 1 for accommodating the second sealing element 20.2. The first recess 11.1 and the second recess 11.2 each extend in the longitudinal direction X.

[0029] For example, the first sealing element 20.1 is a first sealing cord. Furthermore, the second sealing element 20.2 is, for example, a second sealing cord. The first sealing element 20.1 and the second sealing element 20.2 each extend in the longitudinal direction X. The first and second sealing elements 20.1, 20.2 are accommodated over their entire lengths by the first and second recesses 11.1, 11.2, respectively.

[0030] By means of the first and second sealing elements 20.1, 20.2, the two-part casing formed by the first and second casing parts 10.1, 10.2 can be sealed transversely, i.e. in the Y direction, relative to the base body 1. This is shown in FIG.

[0031] The position measuring device has a first cover element 10.3 arranged on the first end portions A, A' of the first and second casing parts 10.1, 10.2, and a second cover element 10.4 arranged on the second end portions B, B' of the first and second casing parts 10.1, 10.2 (see FIG. 8), opposite the first end portions A, A'. As can be seen in FIG. 8, a third sealing element 20.3 is arranged between the first end portions A, A' and the first cover element 10.3. Furthermore, a fourth sealing element 20.4 is arranged between the second end portions B, B' and the second cover element 10.4. In particular, the third sealing element 20.3 and the fourth sealing element 20.4 are each formed in a plate shape. Furthermore, it can be seen from FIG. 8 that the first and second cover elements 10.3, 10.4 can be connected to the base body 1 via fastening screws 4.41, 4.42, respectively (fastening screw 4.4).

[0032] The third sealing element 20.3 and the fourth sealing element 20.4 may each also be referred to as a (compressible) sealing plate.

[0033] The first and second cover elements 10.3 and 10.4 represent the third and fourth casing sections (end casing sections), respectively, as shown in Figure 1. The third and fourth sealing elements 20.3 and 20.4 allow the casing formed by the first to fourth casing sections 10.1 to 10.4 to be sealed at the end, i.e., at the first end section A, A' or at the second end section B, B'.

[0034] FIG. 3a shows one end of the position measuring device according to FIG. 1. In particular, FIG. 3a shows the first end A' of the second casing part 10.2 and the first cover element 10.3 (third casing part). FIG. 3b shows the third sealing element 20.3 arranged between the second and third casing parts 10.2 and 10.3. The second and third sealing elements 20.2 and 20.3 can be seen in the cross-section of FIG. 4. As shown in FIG. 4, the second and third sealing elements 20.2 and 20.3 are arranged flush with the mounting surface 1.1 of the base body 1, respectively. As a result, lateral sealing of the casing relative to the base body 1 is achieved. This is illustrated in FIG. 4 for the end side shown in FIG. 3a. The situation is similar for the opposite end side of the position measuring device.

[0035] Referring to FIG. 2, the first casing part 10.1 has a third recess 11.3 for receiving the first sealing lip 18.1. Furthermore, the second casing part 10.2 has a third portion 10.22 opposite the base body 1. The first casing part 10.1 and the third portion 10.22 are arranged opposite each other in the second direction (Y direction). As shown in FIG. 2, the second casing part 10.2 has a fourth recess 11.4 arranged in the third portion 10.22 for receiving the second sealing lip 18.2. The third recess 11.3 and the fourth recess 11.4 each extend in the longitudinal direction X. The first and second sealing lips 18.1 and 18.2 are respectively received by the third and fourth recesses 11.3 and 11.4 over their entire lengths. This sealing lip 18 serves to seal the hollow profile 10 formed by the base body 1, the first casing part 10.1 and the second casing part 10.2 downwards, i.e. in the (negative) Z direction (see FIG. 2).

[0036] By means of the sealing lip 18 and the first to fourth sealing elements 20.1 to 20.4, a substantially complete sealing of the position measuring device is achieved, thus resulting in a system that is sealed against fluids (e.g. cooling lubricants) as a whole.

[0037] The position measuring device particularly represents an encapsulated, unguided system, in which the scanning unit 14 is movable relative to the hollow profile 10 in the longitudinal direction X, in particular independently of the scale 12 and independently of the first and second casing parts 10.1, 10.2 (see FIG. 2). As shown in FIG. 2, the scanning unit 14 does not have a common guideway with the scale 12 or with the first and second casing parts 10.1, 10.2.

[0038] More details of the follower 16 are explained in Figures 5 to 7 (or Figure 8). According to Figure 8, the follower 16 has an assembly area 16.1. The assembly area 16.1 is used to connect the follower 16 to the measurement object 2. As shown in Figure 8, the follower 16 can be connected to the measurement object 2 via a fastening screw 4.3. Furthermore, the follower 16 has a sword-shaped central piece 16.2, an adapter piece 16.3, and a closure element 16.4. The adapter piece 16.3 is used to connect the scanning unit 14 to the sword-shaped central piece 16.2. By means of the adapter piece 16.3, the scanning unit 14 can be adjusted relative to the scale 12 in multiple degrees of freedom (e.g., degrees of freedom Y, RY, Z). The adapter piece 16.3 and the assembly area 16.1 are connected to each other by the sword-shaped central piece 16.2.

[0039] As shown in Figure 2, the sword-shaped central piece 16.2 extends from the inside of the hollow profile 10 through the sealing lip 18 to the assembly area 16.1 located outside the hollow profile 10. The scanning unit 14 comprises a cable 14.1 (see Figure 8). The cable 14.1 has an upper part 14.11 and a lower part 14.12. The upper part 14.11 extends from the scanning unit 14 to the sword-shaped central part 16.2. The lower part 14.12 extends out of the assembly area 16.1 in the longitudinal direction (X-direction) (see Figures 2 and 8).

[0040] The follower 16 is used in particular to hold the scanning unit 14. Referring to Figure 5a, the follower 16 has an opening 17 for receiving and guiding the cable 14.1 therethrough. The opening 17 extends through at least a part of the follower 16 (see Figure 6b). As a result, the cable 14.1 can be guided through at least a part of the follower 16, in particular through the sword-shaped central part 16.2.

[0041] With regard to the geometry of the follower 16, the longitudinal direction (X-direction) corresponds to the direction extending parallel to the longitudinal extension of the follower 16, the first direction (Z-direction) corresponds to the direction extending perpendicular to the base surface G of the follower 16, and the second direction (Y-direction) corresponds to the direction extending perpendicular to the longitudinal extension of the follower 16 and parallel to the base surface G of the follower 16.

[0042] 5a and 6b, the follower 16 is formed so that the cable 14.1 can be guided in a first direction (Z direction) through the sword-shaped central part 16.2, and further so that the cable 14.1 can be guided in the longitudinal direction (X direction) through the assembly area 16.1 in the longitudinal part L of the follower 16.

[0043] Referring to FIG. 6a, the sword-shaped central portion 16.2 has a first extension L1 in the second direction (Y direction). For example, the first extension L1 is in the range of 1.0 to 1.5 times, or in the range of 1.0 to 1.25 times, the diameter D of the cable 14.1. Therefore, the first extension L1 is larger than the diameter D of the cable 14.1, in particular, slightly larger than or equal to the diameter D of the cable 14.1. Therefore, the first extension L1 (i.e., the width of the sword-shaped central portion 16.2) is adapted to accommodate the cross section of the cable 14.1 by the sword-shaped central portion 16.2.

[0044] FIG. 5b shows that the follower 16 has a recess 16.4' in its longitudinal portion L for laterally inserting the cable 14.1 into the follower 16. Referring to FIG. 6a, the recess 16.4' has a first section 20.1 (slot) including the opening 17 and a second section 20.2 adjacent to the first section 20.1. The first section 20.1 and the second section 20.2 form the section 20 of the follower 16 that is L-shaped in plan view. The first section 20.1 extends in the longitudinal direction (X direction). The second section 20.2 extends in the second direction (Y direction). The first section 20.1 is located in the central region Q of the follower 16. The second section 20.2 extends from the lateral surface 24 of the follower 16 to the central region Q of the follower 16.

[0045] Referring to FIG. 6a, the first section 20.1 has a second extension L2 in the second direction (Y-direction). Furthermore, the second section 20.2 has a third extension L3 in the longitudinal direction (X-direction). For example, the second extension L2 and / or the third extension L3 are each in the range of 1.0 to 1.25 times or 1.0 to 1.15 times the diameter D of the cable 14.1. Therefore, the second and third extensions L2 and L3 are each larger than the diameter D of the cable 14.1, in particular, slightly larger than or equal to the diameter D of the cable 14.1. As a result, the cable 14.1 can be laterally inserted into the follower 16 via the L-shaped portion 20.

[0046] Referring to Figure 5b, the follower 16 is provided with a closure element 16.4 corresponding to the recess 16.4' (see also Figure 7). The closure element 16.4 is detachably connected to the complementary part C of the follower 16. As shown in Figure 6b, the follower 16 has a first inner contour 17.1. Furthermore, the closure element 16.4 has a second inner contour 17.2 opposite the first inner contour 17.1. The first inner contour 17.1 and the second inner contour 17.2 each extend through the longitudinal part L of the follower 16. The first inner contour 17.1 and the second inner contour 17.2 form an opening 17 for receiving and guiding the cable 14.1 therethrough.

[0047] A cross-sectional plane S1 is shown in Figure 6b, which extends parallel to the longitudinal extension of the follower 16 and perpendicular to the base surface G of the follower 16. In addition, the cross-sectional plane S1 extends through the cable 14.1 (or through the opening 17). For example, the opening 17, which is formed by the first and second inner contours 17.1, 17.2, has an arcuate or angled transition. According to Figure 6b, this transition has an essentially L-shape.

[0048] In figure 5b the closure element 16.4 is shown in the detached state and is connectable with the complementary part C of the follower 16 via a fastening screw 4.5.

[0049] Referring to Figure 5b, the recess 16.4' is formed so that when the closure element 16.4 is disengaged from the complementary part C (i.e. in the detached state), the cable 14.1 can be fitted into the follower 16 in the second direction (Y direction).

[0050] The closure element 16.4 in particular has a dual function: on the one hand, it is used to reclose the recess 16.4' (or the follower 16) after the cable 14.1 has been laterally inserted into the follower 16; on the other hand, it is formed in such a way that it provides a strain relief for the cable 14.1 in the connected state. In Figure 7, the inner wall (second inner contour 17.2) of the closure element 16.4 is clearly visible.

[0051] The opening 17 has, for example, a round, square or rectangular cross section. As can be seen in Fig. 6b, the opening 17 has a fourth length L4 in the plane S2, which in this case extends parallel to the base surface G of the follower 16. For example, the fourth length L4 is in the range of 1.0 to 1.25 or 1.0 to 1.15 times the diameter D of the cable 14.1. Advantageously, the cross section of the opening 17 is adapted to the cross section of the cable 14.1 (see Fig. 6a).

[0052] Preferably, the fourth length L4 is in the range of 2 mm to 20 mm, or in the range of 5 mm to 15 mm.

[0053] The follower 16 is preferably part of the position measuring device described in Figures 1 to 8 (i.e., an encapsulated length measuring device having a two-part casing). Alternatively, the follower 16 is also suitable for use in an encapsulated length measuring device having a one-piece casing.

[0054] The parts set for a position measurement device described in Figures 1 to 8 comprises a first casing part 10.1 connectable to the base body 1 and a second casing part 10.2 connectable to the base body 1. Furthermore, the parts set has a driver 16 for holding the scanning unit 14.

[0055] Furthermore, the component set can comprise additional elements 10.1 to 10.4, 20.1 to 20.4 and 18 (total component set). By assembling the component set, an already available open length measuring system (i.e. a system without encapsulation) consisting of the scale 12 and the scanning unit 14 can be encapsulated.

[0056] The present invention has the following advantages, among others: The component set is suitable for encapsulating any open length measuring system (universal applicability), in which case there is no need to change or redesign the assembly process or assembly method of the open length measuring system (e.g., assembly of special cables), the simplified structure of the position measuring device leads to low system costs, and the casing of the position measuring device can be disassembled (e.g., for cleaning) without the need to readjust the position measuring device.

[0057] The invention allows for particularly high-resolution position measurements if the measuring graduation is designed to be optically scannable. Alternatively, the measuring graduation can be designed to be magnetically, inductively or capacitively scannable. The present application relates to the invention described in the claims, but also includes the following as other aspects. 1. A follower (16) for a position measuring device, comprising: The follower (16) is configured to hold the scanning unit (14) of the position measuring device, in which: The follower (16) has an opening (17) for receiving and guiding the cable (14.1) of the scanning unit (14) through it, An entrainer (16) characterized in that the opening (17) extends through at least a portion of the entrainer (16). 2. The follower (16) has a sword-shaped central part (16.2), The follower (16) according to claim 1, characterized in that the follower (16) is formed in such a way that the cable (14.1) can be guided through the sword-shaped central part (16.2) in a first direction (Z) extending perpendicular to the base surface (G) of the follower (16). 3. the sword-shaped central portion (16.2) has a first extension (L1) in a second direction (Y) extending perpendicular to the longitudinal extension of the follower (16) and parallel to the base surface (G) of the follower (16); 3. The entrainer (16) according to item 2 above, wherein the first extension (L1) is in the range of 1.0 to 1.5 times the diameter (D) of the cable (14.1), or in the range of 1.0 to 1.25 times the diameter (D) of the cable (14.1). 4. 4. The follower (16) according to any one of the above items 1 to 3, characterized in that the follower (16) has a recess (16.4') provided in the longitudinal part (L) of the follower (16) for fitting the cable (14.1) laterally into the follower (16). 5. The recess (16.4') has a first section (20.1) including the opening (17) and a second section (20.2) adjacent to the first section (20.1); The first section (20.1) and the second section (20.2) form a portion (20) that is L-shaped when viewed from above with respect to the entrainer (16), The first section (20.1) extends in a longitudinal direction (X) parallel to the longitudinal extension of the entrainer (16), The second section (20.2) is perpendicular to the longitudinal extension of the entraining part (16) and extending in a second direction (Y) extending parallel to the base surface (G); 5. The entrainer (16) according to claim 4, characterized in that the first section (20.1) is arranged in the central region (Q) of the entrainer (16), and the second section (20.2) extends from the side (24) of the entrainer (16) to the central region (Q) of the entrainer (16). 6. the first section (20.1) has a second extension (L2) in a second direction (Y); the second section (20.2) has a third extension (L3) in the longitudinal direction (X); The following body (16) according to item 5 above, characterized in that the second extension (L2) and / or the third extension (L3) are in the range of 1.0 to 1.25 times the diameter (D) of the cable, or in the range of 1.0 to 1.5 times the diameter (D) of the cable, respectively. 7. The follower (16) has a closing element (16.4) corresponding to the recess (16.4'), The closure element (16.4) is detachably connected to a complementary part (C) of the entrainer (16), The entrainer (16) has a first inner contour (17.1), The closure element (16.4) has a second inner contour (17.2) opposite to the first inner contour (17.1), The first inner contour (17.1) and the second inner contour (17.2) each extend through the longitudinal extension (L) of the entrainer (16), 7. The follower (16) according to any one of claims 4 to 6, characterized in that the first inner contour (17.1) and the second inner contour (17.2) form an opening (17) for receiving and guiding the cable (14.1) therethrough. 8. 8. The entrainer (16) according to claim 7, characterized in that the opening (17) formed by the first and second inner contours (17.1, 17.2) has an arcuate or angled progression in a cross section (S1) extending parallel to the longitudinal extension of the entrainer (16) and perpendicular to the base body (G) of the entrainer (16). 9. The recess (16.4') is When the closure element (16.4) is disengaged from the complementary part (C), 9. The follower (16) according to claim 7 or 8, characterized in that it is formed so that the cable (14.1) can be fitted into the follower (16) in a second direction (Y) extending perpendicular to the longitudinal extension of the follower (16) and parallel to the base surface (G) of the follower (16). 10. 10. The follower (16) according to any one of claims 7 to 9, characterized in that the closure element (16.4) is configured in such a way that, in the connected state, it causes a strain relief for the cable (14.1). 11. The follower (16) has an assembly area (16.1) for connecting the follower (16) to the object (2), 11. The follower (16) according to any one of claims 1 to 10, characterized in that the follower (16) is formed so that the cable (14.1) can be guided in a longitudinal direction (X) extending parallel to the longitudinal extension of the follower (16) to the longitudinal part (L) of the follower (16) through the assembly area (16.1). 12. 12. The entrainer (16) according to any one of 1 to 11 above, wherein the opening (17) has a circular, square or rectangular cross section. 13. 13. The entrainer (16) according to any one of 1 to 12 above, characterized in that it has a fourth extension (L4) in a surface (S2) extending parallel to the base surface (G) of the entrainer (16), and the fourth extension (L4) is in the range of 1.0 to 1.25 times the diameter (D) of the cable (14.1) or in the range of 1.0 to 1.15 times the diameter (D) of the cable (14.1). 14. 14. The entrainer (16) according to the above item 13, characterized in that the fourth extension (L4) is in the range of 2 mm to 20 mm, or in the range of 5 mm to 15 mm. 15. 15. A position measuring device having a follower according to any one of claims 1 to 14, characterized in that the position measuring device is a capsule-type length measuring device having a one-part or two-part housing.

Claims

1. A follower (16) for a position measuring device, comprising: The follower (16) is configured to hold a scanning unit (14) of a position measuring device, The follower (16) has an opening (17) for receiving and guiding the cable (14.1) of the scanning unit (14), The opening (17) extends through at least a portion of the entrainer (16); In the following body (16), The follower (16) has a recess (16.4') in its longitudinal part (L) for laterally inserting the cable (14.1) into the follower (16), The follower (16) has a closing element (16.4) corresponding to the recess (16.4'), The closure element (16.4) is detachably connected to a complementary part (C) of the follower (16), The follower (16) has a first inner contour (17.1), The closure element (16.4) has a second inner contour (17.2) opposite to the first inner contour (17.1), The first inner contour (17.1) and the second inner contour (17.2) each extend through the longitudinal extension (L) of the follower (16), The first inner contour (17.1) and the second inner contour (17.2) form an opening (17) for receiving and guiding the cable (14.1) therethrough. A follower (16) characterized in that

2. The follower (16) has a sword-shaped central part (16.2), 2. The follower (16) according to claim 1, characterized in that the follower (16) is formed in such a way that the cable (14.1) can be guided through the sword-shaped central part (16.2) in a first direction (Z) extending perpendicularly to the base surface (G) of the follower (16).

3. the sword-shaped central part (16.2) has a first extension (L1) in a second direction (Y) extending perpendicular to the longitudinal extension of the follower (16) and parallel to the base surface (G) of the follower (16); 3. The follower (16) according to claim 2, characterized in that the first extension (L1) is in the range of 1.0 to 1.5 times the diameter (D) of the cable (14.1), or in the range of 1.0 to 1.25 times the diameter (D) of the cable (14.1).

4. The recess (16.4') has a first section (20.1) including the opening (17) and a second section (20.2) adjacent to the first section (20.1); The first section (20.1) and the second section (20.2) form a part (20) that is L-shaped when viewed from above with respect to the follower (16), The first section (20.1) extends in a longitudinal direction (X) parallel to the longitudinal extension of the follower (16), The second section (20.2) is perpendicular to the longitudinal extension of the entraining part (16) and extending in a second direction (Y) extending parallel to the base surface (G); 2. The follower (16) according to claim 1, characterized in that the first section (20.1) is arranged in a central region (Q) of the follower (16), and the second section (20.2) extends from a side (24) of the follower (16) to the central region (Q) of the follower (16).

5. the first section (20.1) has a second extension (L2) in the second direction (Y); the second section (20.2) has a third extension (L3) in the longitudinal direction (X); 5. The follower (16) according to claim 4, characterized in that the second extension (L2) and / or the third extension (L3) are in the range of 1.0 to 1.25 times the diameter (D) of the cable or in the range of 1.0 to 1.5 times the diameter (D) of the cable, respectively.

6. 2. The follower (16) according to claim 1, characterized in that the opening (17) formed by the first and second inner contours (17.1, 17.2) has an arcuate or angled progression in a cross section (S1) extending parallel to the longitudinal extension of the follower (16) and perpendicular to the base body (G) of the follower (16).

7. The recess (16.4') When the closure element (16.4) is disengaged from the complementary part (C), 2. The follower (16) according to claim 1, characterized in that the follower (16) is formed so that the cable (14.1) can be fitted into the follower (16) in a second direction (Y) extending perpendicular to the longitudinal extension of the follower (16) and parallel to the base surface (G) of the follower (16).

8. 2. Follower (16) according to claim 1, characterized in that the closure element (16.4) is designed in such a way that in the connected state it causes a strain relief for the cable (14.1).

9. The follower (16) has an assembly area (16.1) for connecting the follower (16) to the object (2), 2. The follower (16) according to claim 1, characterized in that the follower (16) is formed in such a way that the cable (14.1) can be guided in a longitudinal direction (X) extending parallel to the longitudinal extension of the follower (16) in a longitudinal part (L) of the follower (16) through an assembly area (16.1).

10. 2. The entrainer (16) according to claim 1, characterized in that the opening (17) has a circular, square or rectangular cross section.

11. 2. The follower (16) according to claim 1, characterized in that it has a fourth extension (L4) in a plane (S2) extending parallel to the base plane (G) of the follower (16), the fourth extension (L4) being in the range of 1.0 to 1.25 times the diameter (D) of the cable (14.1) or in the range of 1.0 to 1.15 times the diameter (D) of the cable (14.1).

12. Follower (16) according to claim 11, characterized in that the fourth extension (L4) is in the range of 2 mm to 20 mm, or in the range of 5 mm to 15 mm.

13. 2. The position measuring device with a follower according to claim 1, wherein the position measuring device is a capsule-type length measuring device having a one-part or two-part housing.

Images