Assembly having a hollow element

Abstract

The invention relates to an assembly (101) for a wind turbine gear mechanism, having a first housing part (103), a second housing part (105), a hollow element (117), and a screw (107), by means of which the first housing part (103) and the second housing part (105) are screwed together, wherein the first housing part (103) has a first bore (109, 113) and the second housing part (105) has a second bore (111, 115) which are aligned with one another; the hollow element (117) is received in the first bore (109, 113) and the second bore (111, 115), the hollow element establishing a form-fitting connection between the first housing part (109, 113) and the second housing part (111, 115); and the screw (107) is received in the hollow element (117). A first end face (201) of the hollow element (117) is at least partly beveled.

Description

[0001] ZF Friedrichshafen AG File 303466 Friedrichshafen 2025-01-13

[0002] arrangement with a hollow element

[0003] The invention relates to an arrangement according to the preamble of claim 1 and a method according to claim 5.

[0004] From EP 3682 145 B1, a planetary gear unit with a ring gear housing is known, which is connected to a housing component at its end face. A plurality of recesses are formed on one end face of the ring gear housing. A hollow element is received in at least one of the recesses. It forms a positive connection between the ring gear housing and the housing component. A screw is received in the hollow element. The hollow element has the shape of a hollow cylinder. Its end faces are annular and planar.

[0005] The invention is based on the objective of making available a wind turbine gearbox that is improved compared to the prior art. This objective is achieved by an arrangement according to claim 1 and a method according to claim 2. Preferred embodiments are described in the dependent claims and the following description, as well as in the exemplary embodiments illustrated in the figures.

[0006] The arrangement according to the invention is designed as part of a wind turbine gearbox. It comprises a first housing part, a second housing part, a hollow element, and a screw. The first housing part and the second housing part are screwed together by the screw and, optionally, further screws. A torque can be transmitted via the screw connection. In particular, this torque can be supported by one or more torque arms in a machine frame of the wind turbine.

[0007] The first and second housing parts, together with any other housing parts that may be present, form the housing of the wind turbine gearbox. The first and / or the second housing part may be components of a housing wall. It is also possible that a ring gear of the wind turbine gearbox forms the first or second housing part. ZF Friedrichshafen AG File 303466 Friedrichshafen 2025-01-13

[0008] The first housing part has a first bore, the second housing part a second bore. The two bores are aligned, meaning they share a common central axis, and accommodate the hollow element. A first part of the hollow element engages in the first bore, and a second part in the second bore. This creates a positive fit between the two housing parts.

[0009] Preferably, the first bore and / or the second bore are stepped bores, with the steps forming abutments for the hollow element. An end face of the hollow element and a step are in a positive-locking position against each other or are designed to be in a positive-locking position against each other when the hollow element is displaced within the bores.

[0010] A screw is held in the hollow element. Since the hollow element is held in the two bores, the screw is also held in the two bores.

[0011] According to the invention, a first end face of the hollow element is at least partially, preferably completely, chamfered. In particular, the first end face can be chamfered radially outwards from a central axis of the hollow element.

[0012] The hollow element is self-centering due to its at least partially chamfered first end face. If the hollow element is first inserted into the second bore with its second end face facing down, and then into the first bore with its first end face facing down down, the first end face centers the hollow element during insertion. This makes it possible to compensate for a slight misalignment between the two bores. Despite the misalignment, the assembly can be mounted without the hollow element tilting when inserted into the first bore.

[0013] Preferably, the first end face is conically shaped. In particular, the first end face can have the shape of a lateral surface of a truncated cone. ZF Friedrichshafen AG File 303466 Friedrichshafen 2025-01-13

[0014] Preferably, the second end face of the hollow element is also at least partially, and preferably completely, chamfered. This is advantageous because incorrect assembly due to misalignment of the hollow element in the bores is no longer possible. If both end faces are at least partially chamfered, it makes no difference whether the hollow element is mounted with the first end face in the first bore and the second end face in the second bore, or vice versa, with the first end face in the second bore and the second end face in the first bore.

[0015] The second end face is also preferably conically shaped. In particular, the second end face can also have the shape of a lateral surface of a truncated cone.

[0016] A method according to the invention for assembling the arrangement according to the invention, or a preferred embodiment, comprises the following steps: inserting the second end face of the hollow element into the second bore; joining the first housing part and the second housing part, wherein the first end face of the hollow element is inserted into the first bore; inserting the screw into the hollow element; and tightening the screw. Preferably, the steps are carried out in the specified order.

[0017] Preferred embodiments of the invention are shown in the figures.

[0018] Matching reference numbers indicate identical or functionally equivalent characteristics. Specifically, this shows:

[0019] Fig. 1 shows an arrangement of two screwed-together housing parts; and

[0020] Fig. 2 shows a hollow element.

[0021] The arrangement 101 shown in Fig. 1 comprises a housing wall 103 and a ring gear 105 designed as a housing part. The housing wall 103 and the ring gear 105 are screwed together by means of several screws, one of which, screw 107, is shown by way of example in Fig. 1. ZF Friedrichshafen AG File 303466 Friedrichshafen 2025-01-13

[0022] The screw 107 passes through a bore in the housing wall 103 and is screwed into a threaded bore in the ring gear 105. Both bores are stepped bores, each with a tapered section 109, 111 and a section 113, 115 with a larger diameter. A step runs between the respective tapered section 109, 111 and the widened section 113, 115.

[0023] The tapered section 111 of the bore in the ring gear 105 has the thread into which the screw 107 is screwed. The section 113 with the larger diameter bore in the housing wall 103 and the section 115 with the larger diameter bore in the ring gear 105 are directly adjacent to each other at their openings and form a space in which a hollow element 117 is received. The screw 107 passes through the hollow element 117.

[0024] The shape of the hollow element 117 can be seen in Fig. 2. Specifically, a first end face 201 and a second end face 203 have the shape of a truncated cone surface. An axially extending region of the hollow element between them has the shape of a hollow cylinder. ZF Friedrichshafen AG File 303466

[0025] Friedrichshafen 2025-01-13

[0026] Reference mark

[0027] 101 Arrangement

[0028] 103 Housing wall

[0029] 105 Ring gear

[0030] 107 screw

[0031] 109 rejuvenated area

[0032] 111 rejuvenated area

[0033] 113 Area with larger diameter 115 Area with larger diameter 117 Hollow element

[0034] 201 Front surface

[0035] 203 Front surface

Claims

ZF Friedrichshafen AG File 303466 Friedrichshafen 2025-01-13 Patent claims 1. Arrangement (101) for a wind turbine gearbox; comprising a first housing part (103) and a second housing part (105), a hollow element (117) and a screw (107) with which the first housing part (103) and the second housing part (105) are screwed together; wherein The first housing part (103) has a first bore (109, 113) and the second housing part (105) has a second bore (111, 115) which are aligned with each other; wherein the hollow element (117) is received in the first bore (109, 113) and the second bore (111, 115), which creates a positive fit between the first housing part (109, 113) and the second housing part (111, 115); and wherein the screw (107) is received in the hollow element (117); characterized in that a first end face (201) of the hollow element (117) is at least partially chamfered.

2. Arrangement (101) according to claim 2; characterized in that the first end face (201 ) has a conical shape.

3. Arrangement (101) according to one of the preceding claims; characterized in that Both end faces of the hollow element (117) are at least partially chamfered.

4. Arrangement (101) according to the preceding claim the second end face (203) has a conical shape.

5. Method for assembling an arrangement (101) according to one of the preceding claims; comprising the steps - Inserting the second end face (203) of the hollow element (117) into the second bore (111, 115); - Joining the first housing part (103) and the second housing part (105) wherein the first end face (201) of the hollow element (117) is inserted into the first bore (109, 113); - Inserting the screw (107) into the hollow element (117); and ZF Friedrichshafen AG File 303466 Friedrichshafen 2025-01-13 - Tightening the screw (107).

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