Coupling element for coupling at least one drive shaft with at least one drive unit of a tracking device for solar modules

Abstract

Coupling element (10) for coupling a drive shaft with a drive unit (12) of a tracking device for solar modules, wherein the at least one coupling element (10) has a first coupling area (14) and a second coupling area (16), wherein the first coupling area (14) comprises radial coupling projections (18) and receiving areas (20) arranged between the coupling projections (18), wherein the second coupling area (16) is designed for connection with the drive shaft.

Description

[0001] The present invention relates to a coupling element for coupling at least one drive shaft with at least one drive unit of a tracking device for solar modules.

[0002] Coupling elements for connecting at least one drive shaft to at least one drive unit of a tracking device for solar modules are known in the prior art. These coupling elements are designed to transmit torques from the drive shaft to the drive unit. Under high loads, increased wear of the coupling element can occur, potentially leading to failure of the connection.

[0003] It is an object of the present invention to provide a coupling element that overcomes these problems and ensures a reliable connection of a drive shaft with a drive unit of a tracking device for solar modules.

[0004] These problems are solved with a coupling element having the features of claim 1. Further developments of the invention can be found in the dependent claims.

[0005] The invention relates to a coupling element for coupling at least one drive shaft with at least one drive unit of a tracking device for solar modules, wherein the at least one coupling element has a coupling area, wherein the coupling area has radial coupling projections and receiving areas which are arranged between the coupling projections.

[0006] The coupling element according to the invention can enable improved load absorption when transmitting torque from a drive shaft to a drive device. The first coupling area has coupling projections that can extend outwards from a common center point. Each coupling projection has a predetermined longitudinal extent. This longitudinal extent can extend axially from an end face of the coupling element and be of a predetermined dimension. The longitudinal extent of a coupling element can be matched to the depth of a coupling opening in an element or device to be coupled with the coupling element, into which the first coupling area of ​​the coupling element can be inserted. The radial extent of the coupling projections can increase towards the end face of the coupling element.

[0007] Preferably, the coupling projections can be arranged with uniform angular spacing and a uniform longitudinal extent around the center point. The receiving areas can be designed to receive complementary projections on an element or device to be coupled to the coupling element.

[0008] According to one embodiment, the first coupling area can be essentially cruciform. Accordingly, the first coupling area can have a cruciform cross-section. The cruciform design of the coupling area can, in particular, ensure improved load-bearing capacity of the coupling element, since the receiving areas can have a larger surface area for receiving and / or transmitting forces compared to other coupling area designs.

[0009] The second coupling area can be designed for connection to a drive shaft. This second coupling area can have a connection opening. The free axial end of the second coupling section can widen radially, for example, to facilitate the insertion of a drive shaft. The drive shaft can be designed to fit precisely within the second coupling area. This ensures the reliable absorption and / or transmission of forces from the drive shaft to the coupling element.

[0010] The coupling projections can have side walls. In particular, each coupling projection can have two side walls. The side walls of adjacent coupling projections can form a receiving area between them.

[0011] The side walls can each have at least one planar section. The planar design can, in particular, ensure a simplified and precise assembly process.

[0012] Alternatively, each side wall can have at least one convexly curved section. The convex curvature can extend over the entire length of the side wall or only over a predetermined section. Starting from the end face of the coupling element, the convex section can extend over a predetermined length of the coupling projections. A convex design can compensate for angular tolerances in the rotation of the drive shaft. Compensating for angular tolerances can be particularly advantageous when drive shafts run at an angle to the axis of rotation of the actual drive or drive unit due to uneven ground or hilly terrain.

[0013] The front face of the coupling element can preferably be flat, which ensures precise positioning of the coupling element.

[0014] Each of the radial coupling projections has an outer circumferential surface that defines the radially outer end of the respective coupling projection. The circumferential surface can have a shape that is particularly designed to simplify the assembly of the coupling element. Preferably, the circumferential surface can be rounded.

[0015] Each connecting surface can join the side walls of adjacent coupling projections. This connecting surface can be concave. The concave design allows for a more user-friendly assembly process, as it prevents damage to the contact surfaces of the connecting elements.

[0016] For improved force absorption, the coupling projections can be arranged in a cross shape. In this configuration, the receiving area of ​​the first coupling element can have a particularly large surface for absorbing and / or transmitting forces. This increases the load-bearing capacity and reduces the material stress on the coupling element.

[0017] The first coupling area can have a mounting opening. The mounting opening is preferably located at the center of the first coupling area, from which the radially extending coupling projections radiate. In other words, the central axis of the coupling element, which coincides with its longitudinal axis, can pass through the mounting opening. The contour of the mounting opening can be defined by the inner contour of the radially arranged coupling projections. The mounting opening can thus be formed directly by the geometry of the coupling projections, enabling simple and precise manufacturing, as no additional shaping element is required.

[0018] The second coupling area can have mounting openings designed for connection to a drive shaft. The drive shaft can have mounting openings arranged according to the configuration of the second coupling area. These mounting openings are designed to accommodate fastening elements. Preferably, the fastening element can be a screw connection. The second coupling area can have a connection opening into which the drive shaft can be inserted with a precise fit. When the drive shaft is assembled, the two fixing openings of the drive shaft and the second coupling area can be connected to each other by a fastening element.

[0019] The coupling element can have at least a first tubular section, a second tubular section, and a third tubular section, which may differ in diameter. According to one embodiment, the diameter can increase from the first tubular section to the third. Conical sections can be arranged between the individual sections, forming a smooth transition between the different diameters. The conical sections can positively connect the tubular sections. Such a design of the coupling element can simplify the assembly of components with different diameters. Furthermore, material can be saved and the weight of the coupling element can be specifically reduced.

[0020] The first coupling area is integrally formed with the first tubular section, which has the smallest diameter. "Integrated" means that the coupling area is an integral part of the first tubular section and was not subsequently attached to it. This design can particularly improve the stability of the coupling element, as the coupling element has no joints.

[0021] Furthermore, the present invention relates to a drive device of a tracking device for solar modules with at least one drive element and at least one coupling element.

[0022] The drive element has at least one connection area for connection to the first coupling area.

[0023] The connection area has a coupling opening that is designed to be complementary to the first coupling area. The first coupling area can be inserted into the coupling opening, with the receiving areas fitting precisely against the inner wall of the coupling opening.

[0024] The first coupling area and the connection area are positively connected. This positive connection enables, in particular, precise positioning of the outer contour of the first coupling area within the coupling opening. The planar end face of the first coupling area can also positively engage with the inner wall of the coupling opening, thus ensuring precise positioning of the first coupling element.

[0025] The mounting opening and the coupling opening can be designed to accommodate a fastening element that connects the first coupling area and the connection area. With the first coupling area of ​​the coupling element mounted within the coupling opening of the drive element, a fastening element can be inserted through the mounting opening and the coupling opening and secured, thereby creating a force-fit connection between the first coupling area and the connection area. The use of a fastening element allows for a precise and movement-free fixation. The fastening element can be, for example, a screw, a threaded bolt, or the like. Such fastening elements are reliable and particularly cost-effective.

[0026] The coupling opening has a cruciform cross-section. According to one embodiment, the first coupling area also has a cruciform cross-section due to the cruciform arrangement of the coupling projections.

[0027] The cross-shaped cross-sections are designed in such a way that the first coupling area can be arranged in a form-fitting manner in the coupling opening.

[0028] Furthermore, the following invention relates to a tracking device for solar modules, comprising a drive unit and at least one coupling element and at least one drive shaft which is coupled to the drive unit via the at least one coupling element.

[0029] Furthermore, the following invention relates to a shaft connection device comprising a first coupling element and a second coupling element. The two coupling elements can be connected to each other.

[0030] The first coupling element has a first coupling area, and the second coupling element has a coupling opening, with the first coupling area and the coupling opening being positively connected. The first coupling area can be designed to fit precisely into the coupling opening. This ensures accurate and reliable force absorption and transmission between the two coupling elements.

[0031] The first and second coupling elements can have connecting openings designed to receive a fastening element for connecting the first coupling element and the coupling opening. The first coupling element can have connecting openings, in particular, located on its side walls. The second coupling element can have complementary connecting openings on the outer wall of the coupling opening. In an assembled state, the two connecting openings of the first and second coupling elements can be joined together by a fastening element, positioned one above the other. The fastening element can be, for example, a screw, a threaded bolt, or the like. The use of a fastening element can, in particular, enable a precise and movement-free fixation.

[0032] The present invention is described below by way of example with reference to the accompanying figures. The drawings, the description, and the claims contain numerous features in combination. A person skilled in the art will expediently consider the features individually and use them meaningfully in combination within the scope of the claims.

[0033] If more than one instance of a particular object exists, only one of them may be identified with a reference symbol in the figures and description. The description of this instance can then be applied to the other instances of the object. If objects are named using numerical terms, such as first, second, third object, etc., these serve to identify and / or classify objects. Thus, for example, a first object and a third object, but not a second object, may be included. However, numerical terms can also indicate a number and / or sequence of objects.

[0034] They show: Fig. 1. A view of a coupling element; Fig. 2 a detailed view of detail A according to Fig. 1; Fig. 3 a sectional view of the coupling element along the section line AA according to Fig. 1; Fig. 4 a front view of the coupling element; Fig. 5 a rear view of the coupling element; Fig. 6 a perspective view of a drive element, Fig. 7 a front view of the drive element; Fig. 8 a sectional view of a drive element along the section line BB according to Fig. 6; Fig. 9 a perspective view of an embodiment of a shaft coupling device with two coupling elements; and Fig. 10, Fig. 11 to Fig. 12 views of another embodiment of a drive device.

[0035] In Fig. Figure 1 shows an embodiment of a coupling element 10 for coupling or connecting a drive shaft to a drive unit 12 of a tracking device (not shown) for solar modules. The drive unit 12 is shown with reference to the Fig. 6, Fig. 7 to Fig. 8 described in detail. The coupling element 10 can also be referred to as a "drive shaft adapter".

[0036] The coupling element 10 has a first coupling area 14 and a second coupling area 16. The coupling area 14 is for torque-transmitting coupling with the drive unit 12 (see Fig. 6, Fig. 7 to Fig. 8) formed. For this purpose, the coupling area has a coupling contour. The coupling contour has radial coupling projections 18 and receiving areas 20. The receiving areas 20 are formed between the coupling projections 18. The second coupling area 16 is designed for connection to a drive shaft (not shown).

[0037] The coupling element 10 has a first, a second, and a third tubular section 40, 42, 44, which are connected to each other via essentially conical sections 46, 48. The tubular sections 40, 42, 44 differ in their diameter. Tubular section 40 is connected to, or incorporates, the coupling area 16. Tubular section 40 has the smallest diameter, and tubular section 44 has the largest diameter of the tubular sections. The diameter of the middle tubular section 42 lies between the diameter of the first tubular section 40 and that of the second tubular section 44. Starting from the first tubular section, the diameter of the coupling element 10 widens with the conical section 46 to the diameter of the second tubular section 42.In the conical section 48, the diameter of the coupling element 10 widens to the diameter of the third tubular section 44. The coupling element 10 is thus stepped. The coupling element 10 therefore has three diameter steps or diameter discontinuities.

[0038] The third tubular section 44 has the second coupling area 16. The second tubular section 44 with the second coupling area 16 defines a connection opening 50 through which the coupling element 10 can be connected to a drive shaft (not shown) or a similar element. The drive shaft can, for example, be inserted into the connection opening 50. For connecting the drive shaft to the coupling element 10, the third tubular section 44 has fastening openings 24. The fastening openings 24 extend radially through the wall of the coupling element 10. Fasteners (not shown) can be passed through the fastening openings 24 to establish a connection between the coupling element 10 and the drive shaft (not shown).

[0039] Fig. Figure 2 shows an enlarged section from Fig. 1. The enlarged section shows, in particular, the first coupling area 14, the first tubular section 40, and the conical section 46, as well as part of the second tubular section 42. The coupling area 14 has a coupling contour that includes several coupling projections 18. The coupling projections 18 extend radially, as will be discussed in more detail later in this description. The radial coupling projections 18 have side walls 52 and 54. The side walls 52 and 54 each have a section 56 with a predefined curvature. In the embodiment shown, the side walls 52 and 54 have, according to Fig. Two sections 56 with a convex curvature. The curved section 56 is in Fig. 2 schematically indicated. Due to the convexly curved sections 56 of the side walls 52 and 54, the coupling projections 18 have a bulbous shape. The curved sections 56 extend axially from the end face 34 of the coupling element 10 over a predetermined distance. The second end of the curved convex sections lies in a central area of ​​the coupling projections 18.

[0040] The side walls 52 and 54 of the coupling projections 18 (see Fig. 4 and Fig. 5) form receiving areas 20 which are used to receive complementary areas or sections on the drive unit 12 (see Fig. 6, Fig. 7 to Fig. 8) are formed. In the direction of the first tubular section 40, the side walls 52, 54 of adjacent coupling sections 18 approach each other. As the side walls 52, 54 approach each other, the depth of the receiving areas 20 also decreases, so that the ends 58 of the receiving areas 20 lie almost on the diameter of the first tubular section 40. The approach of the side walls 52, 54 to each other only begins after the convexly curved section 58 of the side walls 52, 54. In other words, the convexly curved sections 56 end before the approach of the side walls towards the ends of the receiving area 58 begins.

[0041] Fig. Figure 3 shows a section view along the section line AA in Fig. 1. In the sectional view according to Fig. Figure 3 shows the stepped design of the coupling element 10. Furthermore, the fastening openings 24 are shown in the third tubular section 44. The fastening openings 24 are arranged in pairs. The pairs of fastening openings 24 can be axially offset from each other.

[0042] Fig. Figure 4 shows a front view of the coupling element 10. The coupling area 14 has a predetermined coupling contour. The coupling contour comprises four radial coupling projections 18 that define receiving areas 20 between them in the circumferential direction. Each radial coupling projection 18 has two side walls 52, 54 and an outer circumferential surface 60 that defines the radial end of the coupling projections 18. The side walls 52, 54 define the receiving areas 20 between them. The side walls 52, 54 are connected to each other via connecting surfaces 62. The connecting surface 62 defines the radially inner end of the side walls 52, 54. The connecting surface 62 has a predetermined curvature.

[0043] The radial coupling projections 18 form a cross. The coupling area 14 has a mounting opening 22. The mounting opening 22 forms the center of the cross shape previously formed by the coupling projections 18.

[0044] Fig. Figure 5 shows a rear view of the coupling element 10. The rear view is partially broken open so that the fastening openings 24 are visible. The fastening openings 24 are offset from each other circumferentially on the third tubular section 44.

[0045] Fig. Figure 6 shows a perspective view of a drive element 26, which can be part of a drive unit 12. The drive element 26 has bearing sections 64, 66, with which the drive element 26 can be supported at bearing locations not shown. Contact surfaces 68 are formed on the bearing sections 64, 66, of which in Fig. Figure 6 shows only one. The contact surfaces 68 can serve to support the drive element 26 at the bearing points. This can be particularly advantageous for limiting axial movements of the drive element 26 relative to the coupling element 10. The drive element 26 also has two guide elements or guide discs 70, 72. The guide elements 70, 72 are arranged axially between the bearing sections 64, 66. The guide elements 70, 72 are connected to each other via drive and / or retaining elements. Fig. Figure 8 shows a retaining element 74 that connects the guide elements 70 and 72. A drive arc (not shown) can be guided between the guide elements 70 and 72, which can be driven via the drive element 26 or held in a set position.

[0046] The drive element 26 further comprises two coupling areas 28. Each coupling area 28 has a coupling opening 30. The coupling opening 30 has a predetermined cross-section designed for coupling with the coupling element 14. The coupling opening 30 extends from the end face 36 of the drive element 26 into the bearing sections 64, 66. The coupling opening 30 has receiving arms 76 extending radially. The receiving arms 76 are bounded by radially inwardly extending projections 78. The coupling opening 30 has a cruciform cross-section. The receiving opening 76 is thus complementary to the cruciform coupling area 14 of the coupling element 10.

[0047] Fig. Figure 7 shows a top view of the drive element 26. Fig. Figure 7 shows in particular the coupling opening 30 and its cross-section. The coupling opening 30 has four receiving arms 76. The receiving arms 76 form the cruciform cross-section of the coupling opening 30. The receiving arms 76 are bounded by four projections 78 that extend radially inwards.

[0048] Fig. Figure 8 shows a sectional view of the drive element 26 along the section line BB in Fig. 7. The drive element 26 has two connection areas 28. Each of the connection areas 28 has a coupling opening 30 with the contour described above. The coupling openings 30 extend into the bearing sections 64 and 66. A contact surface 68, extending radially, adjoins each of the bearing sections 64 and 66. Furthermore, two guide elements 70 and 72 are arranged, forming a guide area between them for guiding a drive arc (not shown). The guide elements 70 and 72 are connected to each other via drive and retaining elements, of which in Fig. Figure 8 shows only the retaining element 74.

[0049] Fig. Figure 9 shows a perspective view of an embodiment of a shaft coupling device 80 with two coupling elements 10a and 10b. The first coupling element 10a has a first coupling area 14a and a second coupling area 16a. The second coupling element 10b has a first coupling area 14b and a second coupling area 16b.

[0050] The two second coupling areas 16a, 16b each comprise a connection opening 50a, 50b and two mounting openings 24a, 24b. The mounting openings 24a, 24b are each arranged on opposite sides of the coupling areas 16a, 16b. Both coupling elements 10a, 10b have a tubular section 44a, 44b with a constant diameter that encompasses the second coupling area 16a, 16b.

[0051] The coupling projections 18a of the first coupling element 10a form a cruciform geometry. Connecting openings 38 are arranged on the side walls 52, 54. Each coupling projection 18 has a connecting opening 38. The connecting openings 38 of the coupling projections 18 are axially offset from one another.

[0052] The second coupling element 10b represents a coupling element according to a further embodiment. Coupling projections 18b are arranged on the second coupling element 10b in the first coupling area 14a. The coupling projections 18a form a cross-shaped cross-section. The first coupling area 14b of the second coupling element 10b has a coupling opening 30. The coupling opening 30 is formed by the coupling projections 18b. The coupling opening 30 is complementary to the cross-section of the coupling area 14a of the first coupling element 10a. The outer contour of the coupling opening 30 has connecting openings 38 (not shown) that are arranged complementary to the connecting openings 38 of the coupling area 14. The connecting openings 38 are designed to receive fastening elements 32.In an assembled state, the connecting openings 38 of the coupling opening 30 and the coupling area 14 are aligned one above the other, allowing fastening elements 32 to be attached through the connecting openings 38 to connect the two coupling elements 10 in a force-fit and form-fit manner.

[0053] The coupling area 14a of the first coupling element 10a can be inserted into the coupling opening 30 of the coupling area 14b of the second coupling element 10b. This allows a positive-locking connection between the first coupling element 10a and the second coupling element 10b to be established, enabling the torque transmission of two shaft sections (not shown) via the coupling elements 10a and 10b.

[0054] Fig. Figure 10 shows a view of an embodiment of a drive device 12. In Fig. Figure 11 is a section view along section line BB in Fig. 10 shown. Fig. 12 is a detailed view of detail C in Fig. 11 shown. 12 shown in a further embodiment of a drive device.

[0055] The Fig. 10 and Fig. Figure 11 shows two coupling elements 10a, 10b, each with a first coupling area 14a, 14b and a second coupling area 16a, 16b. The second coupling areas 16a, 16b each have a connection opening 50a, 50b and mounting openings 24a, 24b. The two coupling elements 10a, 10b are positively connected to a drive element 26. The design of the drive element 26 can be Fig. 6 to Fig. 8 can be taken from.

[0056] The sectional view Fig. Figure 11 shows in particular the positive-locking connection of the two coupling elements 10a, 10b with the drive element 26. The first coupling areas 14a, 14b, can be inserted into the coupling openings 30 of the drive element 12 with their coupling projections 18a, 18b. This allows a positive-locking connection between the drive element 26 and the coupling elements 10a, 10b. The coupling elements 10a, 10b can each be coupled to a drive shaft (not shown) via the second coupling areas 16a, 16b. It is thus possible to transmit torques from a drive element to the coupling element 10a and to the drive element 26. Via the drive element 26, the torques can be transmitted to the second coupling element 10b and from there to another drive shaft.

[0057] The sectional view according to Fig. Figure 11 further shows two fastening elements 32, which are designed as two screws. The screws 32 are each partially inserted through the mounting openings 22 in the first coupling areas 14a, 14b (see Figure 11). Fig. 4 and Fig. 5) and through the coupling opening 30 and then attached to the drive element 26. For this purpose, the drive element 26 has two threaded openings 82. The screws 32 can be screwed into these threaded openings 82.

[0058] Fig. Figure 12 shows a detailed view of detail C in Fig.11 The coupling areas 14 and parts of the conical sections 46 of the coupling elements 10 are inserted into the coupling openings 30 of the drive element 26 by a region B. The coupling openings 30 have a conical section 84 at their axially outer end. The contours of the coupling openings 30 are complementary to the coupling areas 14 and the conical sections 46 arranged in regions B. The conical sections 46 protrude from the coupling opening 30 by region A. Region A and region B are identical for both coupling elements 10. Reference symbol list 10 coupling element 12 Drive unit 14 First coupling area 16 Second coupling area 18 coupling advantage 20 Recording area 22 Mounting opening 24 mounting holes 26 Drive element 28 Connection area 30 Coupling opening 32 Fastening element 34 End face of the coupling element 36 Front surface of the drive element 38 Connecting opening 40 First tubular section 42 Second tubular section 44 Third tubular section 46, 48 Conical sections 50 Connection opening 52 side wall 54 side wall 56 arched section 58 End of recording area 60 Circumferential area 62 Connecting surface 64, 66 storage sections 68 site area 70, 72 Guide elements 74 Holding element 76 pickup arms 78 protrusions 80 Shaft connection device 82 threaded openings 84 Conical section of the coupling opening

Claims

[1] Coupling element (10) for coupling a drive shaft with a drive unit (12) of a tracking device for solar modules, wherein the at least one coupling element (10) has a first coupling area (14) and a second coupling area (16), wherein the first coupling area (14) comprises radial coupling projections (18) and receiving areas (20) arranged between the coupling projections (18), wherein the second coupling area (16) is designed for connection with the drive shaft. [2] Coupling element (10) according to claim 1, wherein the coupling projections (18) have side walls (52, 54), wherein the side walls (52, 54) of adjacent coupling projections (18) form one of the receiving areas (20) between them. [3] Coupling element (10) according to claim 2, wherein the side walls (52, 54) each have at least one section (58) which is planar or convex. [4] Coupling element (10) according to one of the preceding claims, wherein each of the radial coupling projections (18) has an outer circumferential surface (60) that defines the radially outer end of the respective coupling projection (18). [5] Coupling element (10) according to one of the preceding claims, wherein a connecting surface (62) connects the side walls (52, 54) of adjacent coupling projections (18) to each other. [6] Coupling element (10) according to one of the preceding claims, wherein the coupling projections (18) are arranged in a cross shape. [7] Coupling element (10) according to one of the preceding claims, wherein the coupling area (14) has a mounting opening (22). [8] Coupling element (10) according to one of the preceding claims, wherein the second coupling area (16) has several fastening openings (24) designed for connection to a drive shaft. [9] Coupling element (10) according to one of the preceding claims, wherein the coupling element (10) has at least a first tubular section (40), a second tubular section (42) and a third tubular section (44) which differ in their diameter. [10] Coupling element (10) according to claim 9, wherein the coupling area (14) is integrally formed on the first tubular section (40), wherein the first tubular section (40) has the smallest diameter. [11] Drive device (12) for a tracking device for solar modules with at least one drive element (26) and at least one coupling element (10) according to one of the preceding claims. [12] Drive device (12) according to claim 11, wherein the drive element (26) has at least one connection area (28) for connection with the coupling area (14). [13] Drive device (12) according to claim 11 or 12, wherein the connection area (28) has a coupling opening (30) which is designed to be complementary to the coupling area (14). [14] Drive device (12) according to one of claims 5 to 7, wherein the coupling area (14) and the connection area (28) are positively connected to each other. [15] Drive device (12) according to one of claims 11 to 14, wherein the mounting opening (22) and the coupling opening (30) are designed to accommodate a fastening element (32) which is configured to connect the coupling area (14) and the connection area (28). [16] Drive device (12) according to one of claims 11 to 14, wherein the coupling opening (30) has a cross-shaped cross-section. [17] Tracking device for solar modules, comprising a drive unit (12) according to one of claims 11 to 16, at least one coupling element (10) according to one of claims 1 to 10 and at least one drive shaft which is coupled to the drive unit (12) via the at least one coupling element (10). [18] Shaft connection device (80) comprising a first coupling element (10a) and a second coupling element (10b) according to any one of claims 1 to 10. [19] Shaft connection device (80) according to claim 18, wherein the first coupling element (10a) has a coupling area (14), wherein the second coupling element (10b) has a coupling opening (30), wherein the coupling area (14) and the coupling opening (30) are positively connected to each other. [20] Shaft connection device (80) according to claim 18 or 19, wherein the first coupling element (10a) and the second coupling element (10b) have connection openings (38) which are designed to receive a fastening element (32) which is configured to connect the coupling area (14) and the coupling opening (30).

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