Device for a connection

Abstract

A device (20) for a connection comprises a first component (30), a second component (40), and a third component (50), wherein the first component (30) has a first thread (31) with a first thread pitch and a second thread (32) with a second thread pitch, wherein the first thread (31) and the second thread (32) are either both external threads or both internal threads, wherein the first thread (31) is arranged axially and radially offset from the second thread (32), and wherein the first thread pitch and the second thread pitch are different sizes, wherein the second component (40) has a third thread (43), wherein the third thread (43) has the first thread pitch and engages with the first thread (31), wherein the third component (50) has a fourth thread (54) and a fifth thread (55),wherein the fourth thread (54) has the second thread pitch and engages with the second thread (32), wherein the fifth thread (55) has the first thread pitch and engages with the third thread (43) to enable a change in the distance between the first thread (31) and the fifth thread (55) and a clamping of the first thread (31) and the fifth thread (55) in the third thread (43) by rotating the third component (50) relative to the first component (30).

Description

[0001] The invention relates to a device for a connection.

[0002] EP 2 267 290 A2 shows a clamping assembly for securing a gas turbine engine. An inner ring with a fine external thread is fully screwed into the fine internal thread of an outer ring. Both rings with a coarse internal thread are then screwed together onto a shaft until the outer ring rests axially against the gas turbine engine. To clamp the clamping assembly, the inner ring is rotated against the outer ring.

[0003] JP H01 - 139 124 U shows a bearing adjusting ring that is screwed onto a bearing journal. The bearing adjusting ring is secured with a threaded nut.

[0004] US 2010 / 0 143 031 A1 shows an inner ring that is screwed into an outer ring. A pin is used to secure the rings.

[0005] It is therefore an object of the invention to provide a new device for connection.

[0006] This problem is solved by the subject matter of claim 1.

[0007] A device for a connection comprises a first component, a second component, and a third component, wherein the first component has a first thread with a first thread pitch and a second thread with a second thread pitch, wherein the first thread and the second thread are either both external threads or both internal threads, wherein the first thread is arranged axially and radially offset from the second thread, and wherein the first thread pitch and the second thread pitch are different sizes, wherein the second component has a third thread, wherein the third thread has the first thread pitch and engages with the first thread, wherein the third component has a fourth thread and a fifth thread, wherein the fourth thread has the second thread pitch and engages with the second thread,wherein the fifth thread has the first thread pitch and engages with the third thread to enable a change in the distance between the first thread and the fifth thread and a clamping of the first thread and fifth thread in the third thread by rotation of the third component relative to the first component.

[0008] This device allows the first component to be screwed in together with the third component relative to the second component, and then the connection can be tightened or clamped. The third component can be twisted with a comparatively high torque. The device requires minimal installation space.

[0009] According to a preferred embodiment, the first thread pitch is larger than the second thread pitch. This allows for high compression force in the third thread and fine adjustment of the distance between the first thread and the fifth thread.

[0010] According to a preferred embodiment, the third component is annular. This allows for a relatively free design of the first and second components.

[0011] According to a preferred embodiment, the third component has a recess or projection on its axial side facing away from the first thread to enable a torque to be applied to the third component via the recess or projection. This allows a torque to be reliably applied to the third component during assembly.

[0012] According to a preferred embodiment, the third component does not protrude axially beyond the first component. This reduces the mass of the third component, and also allows the first and second components to be designed relatively freely.

[0013] According to a preferred embodiment, the third component does not protrude axially beyond the second component. This reduces the mass of the third component, and also allows the first and second components to be designed relatively freely.

[0014] According to a preferred embodiment, the first component or the second component comprises at least one component from a component group consisting of: - pivot bearing, - Housing, - flange, - Electric motor housing, and - Wave.

[0015] Good torque transmission is advantageous for these components.

[0016] According to a preferred embodiment, the first component has a stop for the third component, and the first component and the third component are geometrically designed such that, when the third component rests against the stop, a joint screwing movement of the first component and the third component into engagement with the second component is possible. This advantageously allows the first thread and the fifth thread to be brought into a suitable distance.

[0017] Further details and advantageous developments of the invention will become apparent from the exemplary embodiments described below and illustrated in the drawings, which are in no way to be understood as limiting the invention, as well as from the dependent claims. It is understood that the features mentioned above and those to be explained below can be used not only in the respective combinations specified, but also in other combinations or on their own, without departing from the scope of the present invention. It shows: Fig. 1 in a sectional view a device for connection in a first state, Fig. 2 in a three-dimensional representation the device of Fig. 1, Fig. 3 in a sectional view the device of Fig. 1 in a second state, and Fig. 4 shows a sectional view of an application of the device for connecting a motor flange to a motor housing.

[0018] In the following, identical or functionally identical parts are provided with the same reference symbols and are usually described only once. The description builds on each figure to avoid unnecessary repetition.

[0019] Fig. 1 shows a sectional view of a device 20 for a connection, and Fig. 2 shows the device of Fig. 1 in a spatial representation.

[0020] The device 20 comprises a component 30, a component 40 and a component 50. It is in Fig. 1 in a first state Z1.

[0021] Component 30 has a thread 31 with a first pitch and a thread 32 with a second pitch. Thread 31 and thread 32 are external threads, but they can also be internal threads.

[0022] The thread 31 is axially and radially offset from the thread 32.

[0023] The first thread pitch and the second thread pitch are different. Preferably, the first thread pitch is larger than the second thread pitch.

[0024] In the exemplary embodiment, the component 30 is ring-shaped.

[0025] Component 40 has a thread 43, wherein thread 43 has the first thread pitch and engages with first thread 31. Thus, in the exemplary embodiment, thread 43 is an internal thread. Such an engagement is also referred to as a thread engagement.

[0026] In the exemplary embodiment, component 40 is ring-shaped. It can be referred to as a clamping ring.

[0027] The component 50 has a thread 54 and a thread 55. The component 50 is preferably annular.

[0028] Thread 54 has the second thread pitch and engages with the second thread 32. In the exemplary embodiment, thread 54 is therefore an internal thread.

[0029] Thread 55 has the first thread pitch and engages with thread 43. Therefore, thread 55 is an internal thread in the illustrated embodiment.

[0030] If threads 31 and 32 are internal threads, the remaining threads 43, 54 and 55 change from external thread to internal thread or vice versa.

[0031] In the first state Z1, the distance between the two threads 31 and 55 is selected such that the threads 31 and 55 or the components 30 and 50 can be screwed together into the thread 43. The thread flanks of the thread 31 and the thread 55 thus fall into a grid predetermined by the thread 43, whereby a slight inaccuracy is not critical, since a certain play or tolerance usually exists between an external thread and an internal thread.

[0032] The component 30 can thus, for example, be screwed together with the component 50 into the component 40 until the components 30 and 40 are on the Fig. 1 are flush on the right side, i.e., they end at the same height. Component 30 can therefore also be referred to as an adjusting ring.

[0033] The component 50 preferably does not protrude axially beyond the component 30.

[0034] The component 50 preferably does not protrude axially beyond the component 40.

[0035] In the exemplary embodiment, component 30 has a stop 34 for component 50. Component 30 and component 50 are geometrically designed such that, when component 50 abuts stop 34, a joint screwing movement of the first component 30 and the third component 50 into engagement with the second component 40 is possible. This enables a defined positioning of components 30 and 50 relative to one another in a simple and reliable manner during assembly such that the distance between thread 31 and thread 55 is suitable for jointly screwing components 30 and 50 into component 40.

[0036] The component 50 has a recess 52 or a projection on its axial side 51 facing away from the first thread 31 to enable a torque to be applied to the component 50 via the recess or projection. This allows the rotation of the component 50 relative to the component 30 to be carried out reliably during assembly.

[0037] Fig. 3 shows the device 20 in a second state Z2.

[0038] In state Z2, the distance between thread 31 and thread 50 is changed such that thread 31 is subjected to a force against the right flanks of thread 43, and thread 55 is subjected to a force against the left flanks of thread 43. This leads to a tensioning of threads 31, 50 within thread 43 and thus to a clamping connection that counteracts unwanted rotation of components 30, 50 relative to component 40.

[0039] The changed relative distance between threads 31 and 55 can be achieved by rotating components 30 and 50 relative to each other, which leads to a change in the relative distance via threads 32 and 54 and the different first and second thread pitches. In the exemplary embodiment, component 50 is spaced from stop 34, in contrast to state Z1.

[0040] In other words, during the transition from state Z1 to state Z2, the distance between threads 31 and 55 is increased, so that they are pressed against thread 43 in different directions. This leads to a clamping effect.

[0041] In the exemplary embodiment, the distance between threads 31 and 55 is increased during the transition from state Z1 to state Z2, but it can also be reduced to achieve the clamping effect. To achieve this, components 30 and 50 must have a space after screwing into component 40 to reduce the distance between threads 31 and 55. If stop 34 is provided, component 50 must not rest against stop 34 in state Z1.

[0042] The component 50 is arranged comparatively far outwards, and as a result, a relatively low torque is required to rotate the component 50 relative to the component 30.

[0043] Fig. 4 shows an application example for the use of the device 20.

[0044] Component 40 is designed as a motor flange, and component 30 is intended for supporting a motor housing 70. This allows for a secure connection between the motor housing 70 and component 40, which is designed as a motor flange.

[0045] The device 20 can be used in a variety of ways.

[0046] The component 30 or the second component 40 may comprise at least one component from a component group consisting of - pivot bearing, - Housing, - flange, - Electric motor housing, and - Wave.

[0047] The device enables, on the one hand, a good assembly with precise axial positioning of the component 30 on the component 40 and, on the other hand, a bracing or clamping and thus the possibility of a high torque transmission after actuation of the component 50.

[0048] Naturally, various variations and modifications are possible within the scope of the present invention.

[0049] While in Fig. 1 and Fig. 3, the component 50 is arranged at least partially outside the component 30, it can also be arranged conversely on the inside of the component 30. For this purpose, the corresponding external threads 31, 32, 55 must be changed to internal threads, and the internal threads 43, 54 must be changed to external threads. This similarly enables clamping or locking by actuating the component 50. This embodiment can be used, for example, for an external thread of a shaft, with this external thread being used as thread 43 in such a case. QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] EP 2 267 290 A2

[0002] JP H01 - 139 124 U

[0003] US 2010 / 0 143 031 A1

[0004]

Claims

[1] Device (20) for a connection, which has a first component (30), a second component (40) and a third component (50), wherein the first component (30) has a first thread (31) with a first thread pitch and a second thread (32) with a second thread pitch, wherein the first thread (31) and the second thread (32) are either both external threads or both internal threads, wherein the first thread (31) is arranged axially and radially offset from the second thread (32), and wherein the first thread pitch and the second thread pitch are different sizes, wherein the second component (40) has a third thread (43), wherein the third thread (43) has the first thread pitch and engages with the first thread (31), wherein the third component (50) has a fourth thread (54) and a fifth thread (55),wherein the fourth thread (54) has the second thread pitch and engages with the second thread (32), wherein the fifth thread (55) has the first thread pitch and engages with the third thread (43) to enable a change in the distance between the first thread (31) and the fifth thread (55) and a clamping of the first thread (31) and the fifth thread (55) in the third thread (43) by rotating the third component (50) relative to the first component (30). [2] Device (20) according to claim 1, wherein the first thread pitch is greater than the second thread pitch. [3] Device (20) according to claim 1 or 2, wherein the third component (50) is annular. [4] Device (20) according to one of the preceding claims, in which the third component (50) has a recess (52) or a projection on its axial side (51) facing away from the first thread (31) in order to enable a torque to be applied to the third component (50) via the recess (52) or the projection. [5] Device (20) according to one of the preceding claims, in which the third component (50) does not project axially beyond the first component (30). [6] Device (20) according to one of the preceding claims, in which the third component (50) does not project axially beyond the second component (40). [7] Device (20) according to one of the preceding claims, in which the first component (30) or the second component (40) comprises at least one component from a component group consisting of - pivot bearing, - Housing, - flange, - Electric motor housing, and - Wave. [8] Device (20) according to one of the preceding claims, in which the first component (30) has a stop (34) for the third component (50), and in which the first component (30) and the third component (50) are geometrically designed such that when the third component (50) rests against the stop (34), a common screwing movement of the first component (30) and the third component (50) in engagement with the second component (40) is possible.

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