Fastening device for a functional element

Abstract

Fastening device (1, 26) for a functional element (23) for releasably fastening the functional element (23) to an anchoring element (33) having a thread (32), wherein the fastening device (1, 26) has a fixing element for fixing in or on the functional element (23) and a rotatably mounted fastening bolt (3) with a threaded section (21), and wherein the fastening bolt (3) can be rotated by an angle gear (2) so that the threaded section (21) of the fastening bolt (3) can engage with the thread (32) of the anchoring element (33), characterized in that the fastening bolt (3) and the angle gear (2) are arranged in an angle gear housing (4) and that the angle gear housing (4) can be displaced perpendicular to an axis of rotation (5) of the fastening bolt (3), so that the fastening device (1, 26) can be rotated by an angle gear (2) so that the fastening device (1, 26) can be rotated by an angle gear (2) so that the threaded section (21) of the fastening bolt (3) can engage with the thread (32) of the anchoring element (33), characterized in that the fastening bolt (3) and the angle gear (2) are arranged in an angle gear housing (4) and that the angle gear housing (4) can be displaced perpendicular to an axis of rotation (5) of the fastening bolt (3).26) can be precisely fitted to an anchoring element (33) with a lateral offset from an originally intended position.

Description

[0001] The invention relates to a fastening device for a functional element for the detachable fastening of the functional element to an anchoring element having a thread, wherein the fastening device has a fixing element for fixing in or on the functional element and a rotatably mounted fastening bolt with a threaded section and wherein the fastening bolt can be rotated by an angle gear so that the threaded section of the fastening bolt can be brought into engagement with the thread of the anchoring element.

[0002] Such fastening devices are known in many forms from practical experience and are used to attach functional elements to an anchoring element. The functional elements can fulfill completely different functions and may simply be, for example, longer handles, railing elements, or grab bars. First, one or more anchoring elements are mounted, and then the functional element is attached to the pre-mounted anchoring element(s).

[0003] To facilitate the assembly of a functional element or for aesthetic reasons, the fastening devices can be equipped with an angle gear. In hard-to-reach assembly areas or to avoid obvious indications of the fasteners used, the fastening devices with an angle gear can be designed and arranged in such a way that the fastening of the functional element is facilitated while the type of fastening is not immediately obvious or visible. Such functional elements designed with an angle gear are described and disclosed, for example, in US 3,437,362 A and DE 196 15 013 A1. The angle gear can be actuated with a separate tool inserted through an opening in the functional element.Furthermore, German patent application DE 16 75 684 B discloses a functional element comprising an angle gear and a tool, wherein the tool includes a part of the angle gear. Angle gears can be used in fastening devices, for example, in elevator cabins where mounting the anchoring element and the functional element is difficult due to limited space in the elevator cabin and where strict standards apply, for example, to barrier-free railings.

[0004] Especially with functional elements that must be simultaneously attached to two spaced-apart anchoring elements, a high assembly effort is unavoidable. Even small, but practically unavoidable, tolerances in the distance between the anchoring elements can prevent the functional element from being precisely attached to the two anchoring elements. Since repositioning the anchoring elements is usually impossible or results in undesirable additional work, in cases of small tolerances, the shape of the functional element is adjusted by forcibly deforming the components involved, resulting, for example, in a deformed functional element being attached to the anchoring elements. Excessive deformation of the functional element can negatively affect its aesthetics and often leads to a reduction in its lifespan.If it is not possible to fix the functional element to the anchoring elements even with deformation, the anchoring elements must be reattached to the support or substrate, which involves a high assembly effort and high costs.

[0005] It is therefore considered an object of the present invention to design a fastening device of the aforementioned type with an angle gear in such a way that the fastening device can be precisely fitted to an anchoring element, thereby minimizing the effort required for precise positioning of the anchoring elements on a support and preventing forced deformation of the functional element or the anchoring elements. The anchoring elements should be able to exhibit an offset from their originally intended position that cannot be compensated for by the usual play between individual components of a fastening device.

[0006] This problem is solved according to the invention by arranging the fastening bolt and the angle gear in an angle gear housing and by making the angle gear housing displaceable perpendicular to an axis of rotation of the fastening bolt, so that the fastening device can be precisely positioned on an anchoring element with a lateral offset from an originally intended position. Displacing the fastening bolt perpendicular to its axis of rotation reduces the effort required for precisely positioning the anchoring elements, whereby small tolerances in the spacing of the anchoring elements can be compensated for by a correspondingly displaceable fastening bolt. To secure the functional element, the anchoring elements are first arranged on a support or substrate, and then the functional element is secured to the anchoring elements.If there are small tolerances in the spacing between the anchoring elements, these can be easily compensated for by the fastening device, thus preventing deformation of the functional element or the anchoring elements, or the need to reposition the anchoring elements on the support. This minimizes assembly effort, particularly in hard-to-reach areas, and reduces assembly costs. The inventive displacement of the fastening bolt makes it possible to compensate for a lateral offset of the anchoring elements of a few millimeters.

[0007] The fastening device is advantageously designed such that the bevel gear is fixed to the bevel gear housing and the fastening bolt is rotatably mounted in the bevel gear housing. Fixing the bevel gear and mounting the fastening bolt to the bevel gear housing ensures that if the bevel gear housing is displaced, both the bevel gear and the fastening bolt move together, and no change in the operative connection between the bevel gear and the fastening bolt is necessary.

[0008] According to one embodiment of the fastening device according to the invention, it is advantageously provided that the angle gear housing has a guide flange projecting radially outwards from the axis of rotation of the fastening bolt, the guide flange axially securing the angle gear housing in the fastening device. Since the fastening bolt, and thus the angle gear housing, can only be displaced perpendicular to the axis of rotation of the fastening bolt in the fastening device, the radially projecting guide flange of the angle gear housing secures the angle gear housing in the fastening device.The bevel gear housing is designed in such a way that the guide flange rests against a corresponding recess or shape of the fastening device and a displacement of the bevel gear housing perpendicular to the axis of rotation of the fastening bolt is possible, but an axial displacement of the bevel gear housing along the axis of rotation of the fastening bolt is prevented.

[0009] It is also conceivable that the angle gear housing has, instead of or in addition to the guide flange, a circumferentially extending, radially inwardly shaped guide groove into which adapted shapings of the fastening device engage in order to fix the angle gear housing in the axial direction and at the same time allow a radial displacement of the angle gear housing.

[0010] The invention further provides that the angle gear housing has a groove projecting radially inwards towards the axis of rotation of the mounting bolt, wherein the groove engages with a correspondingly adapted feature of the angle gear and axially secures the angle gear in the angle gear housing. Instead of a groove, stop elements or flanges, or flange sections or projecting tongues, can also be provided, forming a positive-locking engagement or stop surfaces that limit displacement. The angle gear in the angle gear housing is thus secured in such a way that actuation of the angle gear is possible, but axial displacement of the angle gear along the axis of rotation of the mounting bolt is prevented.

[0011] In a particularly advantageous embodiment of the fastening device, the invention provides that the fastening device has a locking sleeve that partially surrounds the angle gear housing, by means of which the fastening device can be fixed to the functional element. The locking sleeve expediently has a larger diameter than the angle gear housing, so that displacement of the angle gear housing within the locking sleeve is possible. The locking sleeve is fixed to the functional element, so that the fastening device and the functional element are connected and the functional element can be attached to the anchoring element.

[0012] According to the invention, the locking sleeve has an engagement flange or an outwardly directed guide groove that engages with the angle gear housing and axially secures the angle gear housing to the locking sleeve. The angle gear housing is secured to the locking sleeve in such a way that radial displacement of the angle gear housing within the locking sleeve is possible, but axial displacement of the angle gear housing is prevented by the flange. This ensures a movable connection between the angle gear housing and the locking sleeve, and thus with the functional element.

[0013] Advantageously, according to the invention, the locking sleeve is adhesively fixed to the functional element. A connection between the locking sleeve and the functional element prevents rotation and displacement of the locking sleeve within the functional element, thereby facilitating easier assembly.

[0014] Alternatively or additionally, the fixing sleeve and the functional element can each have a threaded section, whereby the threaded section of the fixing sleeve can engage with the threaded section of the functional element. For example, the fixing sleeve can have an external thread and the functional element an internal thread, so that both threaded sections can engage. Furthermore, the threaded section can extend completely or only partially along the fixing sleeve. The thread also allows the fixing device to be detached from the functional element, thus enabling disassembly, reassembly, and re-fixing of the fixing device to the functional element at a different installation location with reduced effort. Furthermore, a damaged functional element can be replaced cost-effectively, thereby reducing additional costs.

[0015] The invention further provides that the locking sleeve is force-fitted to the functional element. A force-fit connection can be achieved, for example, by a pattern on the locking sleeve, which is made of plastic, or by adapting the dimensions of the locking sleeve to the functional element. A force-fit connection between the locking sleeve and the functional element also allows for the replacement of the fastening device or the functional element without additional effort or cost.

[0016] According to one embodiment of the fastening device according to the invention, it is advantageously provided that the fastening device has a stop element, wherein the stop element forms a stop for the angle gear housing in the axial direction and axially secures the angle gear housing. The stop element can, for example, be a ring that prevents axial displacement of the angle gear housing. The angle gear housing is secured by the stop element in such a way that radial displacement of the angle gear housing remains possible.

[0017] It is preferably provided that the stop element is arranged on the locking sleeve. The stop element can, for example, be fastened to the locking sleeve by a snap ring, which prevents radial and axial displacement of the stop element.

[0018] It is also conceivable that the stop element is arranged on the angle gear housing. The stop element fixed to the angle gear housing can, for example, rest against a projection of the locking sleeve to axially fix the angle gear housing.

[0019] When using a stop element, the fastening device is advantageously designed such that the stop element and a radially inwardly projecting flange of the fixing sleeve define a displacement space in which the radially outwardly projecting guide flange of the bevel gear housing is located. The dimensions of the displacement space can be adapted to prevent axial displacement of the bevel gear housing, but allow radial displacement of the bevel gear housing, i.e., displacement perpendicular to the axis of rotation of the fixing bolt. The radial dimensions of the displacement space determine the extent to which the bevel gear housing can be radially displaced. The radial dimensions are expediently adapted to the desired tolerances of the distance between two displacement elements such that the maximum permissible tolerances can be compensated for by radial displacement of the bevel gear housing.

[0020] According to the invention, the bevel gear comprises a wheel with a first engagement surface and a mating wheel with a second engagement surface, wherein the wheel engages with the mating wheel at their engagement surfaces, and wherein an axis of rotation of the wheel is arranged perpendicular to or at an angle to an axis of rotation of the mating wheel. Advantageously, the axes of rotation of the wheel and the mating wheel are at a substantially right angle to each other, so that the mating wheel can be actuated by rotating the wheel in a position substantially perpendicular to the axis of rotation of the mating wheel. The engagement surfaces can have a grooved pattern, so that the mating wheel and the wheel engage and, when the wheel is actuated, the mating wheel can also be rotated.

[0021] In a particularly advantageous embodiment of the fastening device, the invention provides that the counter wheel is formed on the fastening bolt, wherein the fastening bolt and the counter wheel have a common axis of rotation. Due to the common axis of rotation and a material-fit connection between the counter wheel and the fastening bolt, when the wheel is rotated, the counter wheel rotates with the fastening bolt, so that the fastening bolt engages with the thread of the anchoring element. The fastening bolt is actuated at an angle to its axis of rotation, the angle being determined by the angle between the engagement surface of the wheel and the engagement surface of the counter wheel.

[0022] It is preferably provided that the counter gear rests against an inner side of the bevel gear housing. By resting the counter gear against the inner edge of the bevel gear housing, the counter gear is axially fixed, while still allowing rotation of the counter gear.

[0023] The invention further provides that the wheel has an internal hexagon socket with which the wheel of the bevel gear can be actuated in order to engage the fastening bolt with the thread of the anchoring element. The internal hexagon socket allows the bevel gear to be actuated and thus the fastening bolt to be turned with an external hexagon wrench, thereby facilitating assembly.

[0024] In a particularly advantageous embodiment of the fastening device, the invention provides that the fastening device has a mounting opening through which the gear of the bevel drive can be actuated at the internal hexagon. The dimensions of the mounting opening are expediently designed such that the internal hexagon can be easily actuated even if the bevel drive housing, and thus the gear, is radially displaced. The shape of the mounting opening can be either round or rectangular; expediently, the mounting opening has an elliptical shape, with the main axis of the ellipse lying on a plane perpendicular to the axis of rotation of the fastening bolt.

[0025] Advantageously, according to the invention, the wheel and the mating wheel have angled engagement surfaces, so that the bevel gear unit forms a bevel gear unit. The angled engagement surfaces expediently have an angle of 45° to each other and remain in mesh with each other. The bevel gear unit can expediently be used to reduce the size of the bevel gear unit or to enable the wheel, and thus the bevel gear unit, to be actuated at a small angle, for example, in specially designed functional elements.

[0026] The fastening device is advantageously designed such that the threaded section of the fastening bolt has an external thread. The external thread of the fastening bolt allows for a simple connection of the fastening bolt to the anchoring element and reduces manufacturing costs compared to a design of the threaded section as an internal thread in a fastening bolt shaped like a sleeve. It is also conceivable that the fastening bolt has a concentric recess with an internal thread that can engage with a corresponding external thread on the anchoring device.

[0027] The fastening bolt is designed to have a second threaded section, and the angle gear housing is designed to have a thread, the thread of which can engage with the second threaded section of the fastening bolt. This second threaded section ensures that the fastening bolt can be displaced axially by a few millimeters along its axis of rotation before engaging with the thread of the anchoring element. The second threaded section of the fastening bolt and the corresponding threaded section on the angle gear housing are arranged so that the fastening bolt can be positioned in a pre-assembled storage and transport position in which it does not protrude beyond the fastening device, or only protrudes minimally.By actuating the angle gear, the fastening bolt, whose second threaded section engages with the angle gear housing, can be displaced a few millimeters axially until a front section of the fastening bolt protrudes beyond the fastening device and can engage with the thread of the anchoring element. Subsequent further actuation of the angle gear then connects the fastening bolt to the anchoring element and secures it.

[0028] In this way, it is possible to arrange the fastening bolt completely within the fastening device for storage and transport purposes and only to move it out of the fastening device immediately before the start of assembly.

[0029] The invention provides that the fastening device has a drive element, wherein the fastening bolt is connected to the counter gear of the bevel gear in a rotationally fixed and axially displaceable manner by the drive element. The drive element can, for example, be an axial groove on the fastening bolt and an axial spring on the counter gear, which fix the fastening bolt to the counter gear in a rotationally fixed manner and cause the fastening bolt to rotate with the counter gear of the bevel gear when the bevel gear is actuated.

[0030] According to one embodiment of the invention, the fastening bolt has a square worm gear edge, and the counter gear of the bevel gear has an internal square, wherein the worm gear edge of the fastening bolt engages with the internal square of the counter gear in a rotationally fixed manner, thus forming the driving element, and wherein the fastening bolt is axially displaceable within the counter gear. With such a design of the fastening bolt and the counter gear of the bevel gear, a structurally simple, cost-effective, and reliable operative connection between the bevel gear and the fastening bolt can be ensured, while simultaneously allowing the fastening bolt to be axially displaceable within the bevel gear.

[0031] To prevent the fastening bolt from unintentionally falling completely out of the angle gear or being displaced, the fastening bolt is provided with a radially projecting stop, the stop limiting axial displacement of the fastening bolt.

[0032] Exemplary embodiments of the inventive concept, which are illustrated in the drawing, are explained in more detail below.

[0033] It shows: Fig. 1 a sectional view of a fastening device with an angle gear, Fig. 2 another sectional view of the in Fig. 1 shown fastening device, Fig. 3 a view of the in Fig. 1 and Fig. 2 shown fastening device, Fig. 4 a partial sectional view of the in Fig. Mounting device shown in 1 to 3, Fig. 5, Fig. 6 views of a fastening device arranged in a functional element, Fig. 7, Fig. 8 views of another embodiment of a fastening device.

[0034] In Fig. 1 and Fig. 2 are sectional views and in Fig. Figure 3 shows a view of a fastening device 1 with a bevel gear 2 and a fastening bolt 3. The fastening bolt 3 and the bevel gear 2 are arranged in a bevel gear housing 4. The fastening bolt 3 is rotatably mounted in the bevel gear housing 4. The bevel gear housing 4 is displaceable in the fastening device 1 perpendicular to an axis of rotation 5 of the fastening bolt 3. The bevel gear housing 4 can be displaced in the fastening device 1 perpendicular to the axis of rotation 5 of the fastening bolt 3 by a few millimeters or more, or approximately by one diameter of the fastening bolt 3, to accommodate a corresponding offset of the bevel gear 2. Fig. 1 and Fig. to compensate for the anchoring element 2 not shown for the fastening bolt 3.

[0035] The angle gear housing 4 has a guide flange 6 projecting radially outwards from the axis of rotation 5 of the mounting bolt 3, the guide flange 6 axially securing the angle gear housing 4 in the mounting device 1. Since the mounting bolt 3, and thus the angle gear housing 4, can only be displaced perpendicular to the axis of rotation 5 of the mounting bolt 3 in the mounting device 1, the radially projecting guide flange 6 secures the angle gear housing 4 in the mounting device 1. The angle gear housing 4 also has a rim 7 projecting radially inwards from the axis of rotation 5 of the mounting bolt 3, which axially secures the angle gear 4.

[0036] The fastening device 1 further comprises a locking sleeve 8 surrounding the angle gear housing 2. This locking sleeve has a larger diameter than the angle gear housing 4, thus allowing the angle gear housing 4 to be displaced within the locking sleeve 8. The locking sleeve 8 has an engagement flange 9 directed radially inward to the axis of rotation 5 of the fastening bolt 3. This flange engages with the angle gear housing 4 and axially secures the angle gear housing 4 to the locking sleeve 8. This ensures a displaceable connection between the angle gear housing 4 and the locking sleeve 8. The locking sleeve 8 has a threaded section 10, which serves to secure the fastening device 1 to the functional element (not shown). Alternatively, the locking sleeve 8 can be bonded or frictionally secured to the functional element.

[0037] The fastening device 1 has a stop element 11 arranged on the locking sleeve 8, the stop element 11 being fixed to the locking sleeve 8 by a retaining ring 12. The stop element 11 forms an axial stop for the angle gear housing 4 and axially secures the angle gear housing 4. The stop element 11 is designed in the form of a ring that prevents axial displacement of the angle gear housing 4. The angle gear housing 4 is secured by the stop element 11 in such a way that radial displacement of the angle gear housing 4 remains possible. The stop element 11 and the radially inwardly projecting engagement flange 9 of the locking sleeve 8 define a displacement space 13 in which the radially outwardly projecting guide flange 6 of the angle gear housing 4 is arranged.

[0038] The bevel gear 2 comprises a gear 14 with a first engagement surface 15 and a mating gear 16 with a second engagement surface 17, wherein the gear 14 engages with the mating gear 16 at the engagement surfaces 15 and 16, and wherein an axis of rotation of the gear 14 is arranged perpendicular to an axis of rotation of the mating gear 16. The engagement surfaces 15 and 17 have a grooved pattern, so that the mating gear 16 and the gear 14 engage and, when the gear 14 is actuated, the mating gear 16 can be rotated along with it. In this embodiment, the mating gear 16 is formed on the mounting bolt 3 and rests against an inner surface 18 of the bevel gear housing 4, and the mounting bolt 3 and the mating gear 16 have a common axis of rotation 5. The wheel 14 of the angle gear 2 has an internal hexagon socket 19, with which the wheel 14 of the angle gear 2 can be actuated.

[0039] The fastening device 1 has a Fig. 1 and in Fig. The mounting opening 20 is visible through which the wheel 14 of the bevel gear 2 can be actuated at the internal hexagon 19. The dimensions of the mounting opening 20 are advantageously designed such that the internal hexagon 19 can be easily actuated even if the bevel gear housing 4, and thus the wheel 14, is radially displaced. The shape of the mounting opening 20 can be either round or rectangular; advantageously, the mounting opening 20 has an elliptical shape, with the major axis of the ellipse lying on a plane perpendicular to the axis of rotation 5 of the mounting bolt 3.

[0040] In this embodiment, the fastening bolt 3 has a threaded section 21 with an external thread 22 and ensures a simple connection between the fastening bolt 3 and the anchoring element (not shown).

[0041] Fig. Figure 4 shows a partial sectional view of the fastening device 1. The fastening device is arranged in a functional element 23 and has a mounting opening 20 through which the wheel 14 of the angle gear 2 can be actuated with an external hexagon key 24.

[0042] Fig. 5 and Fig. Figure 6 shows views of the fastening device 1 arranged in the functional element 23.

[0043] In this embodiment, the functional element 23 is a tubular terrain, and the fastening device 1 ensures a connection between the functional element 23 and an anchoring element (not shown). The fixing sleeve has a threaded section 10, and the functional element 23 has a further threaded section 25, with the threaded section 10 of the fixing sleeve 8 engaging with the threaded section 25 of the functional element 23. The threaded section 10 extends completely along the fixing sleeve 8, allowing the fastening device 1 to be detached from the functional element 23. This facilitates disassembly, reassembly, and re-fixing of the fastening device 1 to the functional element 23 at a different installation location with reduced effort. The compact dimensions of the fastening device 1 also allow it to be fixed to curved functional elements 23.

[0044] Fig. 7 and Fig. Figure 8 shows views of a further embodiment of a fastening device 26. The fastening bolt 3 has a second threaded section 27, and the angle gear housing 4 has a thread 28, the thread 28 of the angle gear housing 4 engaging with the second threaded section 27 of the fastening bolt 3. In the illustrated embodiment, the second threaded section 27 represents an extension of the threaded section 21 of the fastening bolt, with the threaded section 21 transitioning seamlessly into the second threaded section 27. However, it would also be conceivable that there could be a break, a gap, or even a radial offset between the threaded section 21 and the second threaded section 27.

[0045] In this embodiment, the fastening bolt 3 has a square worm gear 29, and the counter gear 16 of the bevel gear 2 has an internal square drive 30. The worm gear 29 of the fastening bolt 3 engages with the internal square drive 30 of the counter gear 16 in a rotationally fixed manner, and the fastening bolt 3 is axially displaceable within the counter gear 16. With this design of the fastening bolt 3 and the counter gear 16 of the bevel gear 2, a structurally simple, cost-effective, and reliable operative connection between the bevel gear 2 and the fastening bolt 3 can be ensured, while simultaneously allowing the fastening bolt 3 to be axially displaceable within the bevel gear 2.

[0046] Furthermore, to prevent the fastening bolt 3 from unintentionally falling completely out of the bevel gear 2, the fastening bolt 3 has a radially projecting stop 31. The stop 31 of the fastening bolt 3 limits axial displacement of the fastening bolt 3 in the bevel gear 2 and thus prevents unwanted displacement or unintentional loosening of the fastening bolt 3 from the fastening device 1.

[0047] The second threaded section 27 of the fastening bolt 3 and the thread 28 adapted to it on the angle gear housing 4 are arranged such that the fastening bolt 3 does not protrude beyond the fastening device 26 in a pre-assembled storage and transport position, or only to an insignificant extent.

[0048] The second threaded section 27 ensures that the fastening bolt 3 can be displaced axially by a few millimeters along the axis of rotation 5 before engaging with a thread 32 of an anchoring element 33. By actuating the angle gear 2, the fastening bolt 3 can be displaced axially by a few millimeters until the external thread 22 of the fastening bolt 3 projects beyond the fastening device 26 and can engage with the thread 32 of the anchoring element 33. Subsequent further actuation of the angle gear 2 then connects the fastening bolt 3 to the anchoring element 33 and secures it to that element.

Claims

[1] Fastening device (1, 26) for a functional element (23) for releasably fastening the functional element (23) to an anchoring element (33) having a thread (32), wherein the fastening device (1, 26) has a fixing element for fixing in or on the functional element (23) and a rotatably mounted fastening bolt (3) with a threaded section (21) and wherein the fastening bolt (3) can be rotated by an angle gear (2) so that the threaded section (21) of the fastening bolt (3) can be brought into engagement with the thread (32) of the anchoring element (33), characterized by, that the fastening bolt (3) and the angle gear (2) are arranged in an angle gear housing (4) and that the angle gear housing (4) can be displaced perpendicular to an axis of rotation (5) of the fastening bolt (3) so that the fastening device (1, 26) can be precisely fitted to an anchoring element (33) with a lateral offset from an originally intended position. [2] Fastening device (1, 26) according to claim 1, characterized by , that the angle gear (2) is fixed to the angle gear housing (4). [3] Fastening device (1, 26) according to claim 1 or 2, characterized by , that the fastening bolt (3) is rotatably mounted in the angle gear housing (4). [4] Fastening device (1, 26) according to one of the preceding claims, characterized by, that the angle gear housing (4) has a guide flange (6) projecting radially outwards from the axis of rotation (5) of the fastening bolt (3) and the guide flange (6) axially secures the angle gear housing (4) in the fastening device (1, 26). [5] Fastening device (1, 26) according to one of the preceding claims, characterized by , that the angle gear housing (4) has a groove projecting radially inwards to the axis of rotation (5) of the fastening bolt (3), the groove being in engagement with the angle gear (2) and axially fixing the angle gear (2). [6] Fastening device (1, 26) according to one of the preceding claims, characterized by , that the fixing element of the fastening device (1, 26) has a fixing sleeve (8) which partially surrounds the angle gear housing (4) and by which the fastening device (1, 26) can be fixed to the functional element (23). [7] Fastening device (1, 26) according to claim 6, characterized by , that the locking sleeve (8) has an engagement flange (9) directed radially inwards to the axis of rotation (5) of the fastening bolt (3) or an outwards directed guide groove which engages with the angle gear housing (4) and axially secures the angle gear housing (4) to the locking sleeve (8). [8] Fastening device (1, 26) according to claim 6 or 7, characterized by , that the fixing sleeve (8) is adhesively fixed to the functional element (23). [9] Fastening device (1, 26) according to claim 6 or 7, characterized by , that the locking sleeve (8) and the functional element (23) each have a threaded section (10, 25), wherein the threaded section (10) of the locking sleeve (8) can be engaged with the threaded section (25) of the functional element (23). [10] Fastening device (1, 26) according to claim 6 or 7, characterized by, that the fixing sleeve (8) is force-fitted to the functional element (23). [11] Fastening device (1, 26) according to one of the preceding claims, characterized by , that the fastening device (1, 26) has a stop element (11), wherein the stop element (11) forms a stop for the angle gear housing (4) in the axial direction and axially secures the angle gear housing (4). [12] Fastening device (1, 26) according to claim 11, characterized by , that the stop element (11) is arranged on the fixing sleeve (8). [13] Fastening device (1, 26) according to claim 11, characterized by , that the stop element (11) is arranged on the angle gear housing (4). [14] Fastening device (1, 26) according to one of claims 11 to 13, characterized by, that the stop element and the radially inwardly projecting flange of the locking sleeve (8) define a displacement space (13) in which the radially outwardly projecting guide flange (6) of the angle gear housing (4) is arranged. [15] Fastening device (1, 26) according to one of the preceding claims, characterized by , that the angle gear (2) has a wheel (14) with a first engagement surface (15) and a counter wheel (16) with a second engagement surface (17), wherein the wheel (14) engages with the counter wheel (16) at the engagement surfaces (15, 17) and wherein an axis of rotation of the wheel (14) is arranged perpendicular to or at an angle to an axis of rotation of the counter wheel (16). [16] Fastening device (1, 26) according to claim 15, characterized by , that the counter wheel (16) is formed on the fastening bolt (3), wherein the fastening bolt (3) and the counter wheel (16) have a common axis of rotation (5). [17] Fastening device (1, 26) according to claim 15 or 16, characterized by , that the counter gear (16) rests against an inner side (18) of the angle gear housing (4). [18] Fastening device (1, 26) according to one of claims 15 to 17, characterized by , that the wheel (14) has an internal hexagon socket (19) with which the wheel (14) of the angle gear can be actuated in order to engage the fastening bolt (3) with the thread (32) of the anchoring element (33). [19] Fastening device (1, 26) according to one of claims 15 to 18, characterized by , that the fastening device (1, 26) has a mounting opening (20) through which the wheel (14) of the angle gear (2) can be actuated on the internal hexagon (19). [20] Fastening device (1, 26) according to one of claims 15 to 19, characterized by, that the wheel (14) and the counter wheel (16) have angled engagement surfaces (15, 17) so that the angle gear forms a bevel gear gear. [21] Fastening device (1, 26) according to one of the preceding claims, characterized by , that the threaded section (21) of the fastening bolt (3) has an external thread (22). [22] Fastening device (1, 26) according to one of the preceding claims, characterized by , that the fastening bolt (3) has a second threaded section (27) and that the angle gear housing (4) has a thread (28), wherein the thread (28) of the angle gear housing (4) can be engaged with the second threaded section (27) of the fastening bolt (3). [23] Fastening device (1, 26) according to one of the preceding claims, characterized by, that the fastening device (1, 26) has a drive element, wherein the fastening bolt (3) is connected to the counter wheel (16) of the angle gear (2) by the drive element in a rotationally fixed and axially displaceable manner. [24] Fastening device (1, 26) according to one of the preceding claims, characterized by , that the fastening bolt (3) has a square worm edge (29) and that the counter wheel (16) of the angle gear has an internal square (30), wherein the worm edge (29) of the fastening bolt (3) engages with the internal square (30) of the counter wheel (16) in a rotationally fixed manner and thus forms the driving element and wherein the fastening bolt (3) is axially displaceable in the counter wheel (16). [25] Fastening device (1, 26) according to one of the preceding claims, characterized by, that the fastening bolt (3) has a radially projecting stop (31), wherein the stop (31) limits an axial displacement of the fastening bolt (3).

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