Connecting Arrangement for Connecting a Shaft to a Component

Abstract

The invention relates to a connecting arrangement for connecting a shaft to a component. A tapered outer surface of an inner ring and a tapered inner surface of an outer ring are configured in a manner corresponding to each other. The outer ring surrounds the inner ring. A union nut surrounds the outer ring and the threaded piece. The union nut has an internal thread and the threaded piece has an external thread, wherein the internal and the external threads are configured in a manner corresponding to each other.

Claims

1. A connecting arrangement for connecting a shaft to a component, comprising: an inner ring; an outer ring; a union nut; and a threaded piece, wherein the inner ring has a tapered outer surface, wherein the outer ring has a tapered inner surface, wherein the tapered outer surface of the inner ring and the tapered inner surface of the outer ring are configured in a manner corresponding to each other, wherein the outer ring surrounds the inner ring, wherein the union nut surrounds the outer ring, wherein the union nut surrounds the threaded piece, wherein the union nut has an internal thread, wherein the threaded piece has an external thread, and wherein the internal thread of the union nut and the external thread of the threaded piece are configured in a manner corresponding to each other.

2. The connecting arrangement of claim 1, wherein the threaded piece surrounds the outer ring, and wherein the threaded piece is arranged between the union nut and the outer ring.

3. The connecting arrangement of claim 1, wherein, during the production of a screw connection to the threaded piece, the union nut moves the outer ring axially along a longitudinal axis in the direction of the threaded piece.

4. The connecting arrangement of claim 1, wherein the threaded piece has a recess for receiving a securing ring.

5. The connecting arrangement of claim 1, wherein the outer ring has a first portion and a second portion along a longitudinal axis, and wherein the threaded piece is arranged in the region of the second portion between the outer ring and the union nut.

6. The connecting arrangement of claim 1, wherein the union nut has, on the end side, an end portion with a recess, wherein an inner diameter of the recess of the end portion is smaller than an inner diameter of the internal thread of the union nut, wherein the outer ring has a first portion, a second portion and a third portion along a longitudinal axis, wherein, along the longitudinal axis, the first portion lies between the second portion and the third portion, and wherein the third portion of the outer ring projects beyond the union nut in an axial direction which faces away from the threaded piece.

7. The connecting arrangement of claim 6, wherein the third portion of the outer ring has a securing ring recess for a securing ring, and wherein the union nut and the outer ring are secured axially against each other along the longitudinal axis.

8. The connecting arrangement as claimed in claim 1, wherein the outer ring has a higher modulus of elasticity than the inner ring.

9. The connecting arrangement of claim 1, wherein the outer ring has a reinforcement.

10. The connecting arrangement of claim 1, wherein the inner ring and the threaded piece are configured as a single part.

11. The connecting arrangement of claim 1, wherein the inner ring has a plurality of circumferentially arranged segments which are separated from one another by longitudinal recesses.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Specifically, there are a multiplicity of possibilities of configuring and developing the device according to the invention. Reference is made in this respect first to the patent claims following patent claim 1 and secondly to the description below of exemplary embodiments in conjunction with the drawing, in which:

[0048] FIG. 1 shows a sectioned three-dimensional illustration of a first variant of a connecting arrangement with a component and part of a shaft,

[0049] FIG. 2 shows part of a section through a second variant of a connecting arrangement with component and shaft,

[0050] FIG. 3 shows a section through a third variant of a connecting arrangement with a component and part of a shaft, and

[0051] FIG. 4 shows a sectioned three-dimensional illustration of the first variant of the connecting arrangement only with the component and without the shaft.

DETAILED DESCRIPTION OF THE DRAWINGS

[0052] FIG. 1 shows a first variant of the connecting arrangement. The shaft 1 is introduced here into a recess of a component 2. In the example shown, the component 2 is part of a joint. The component 2 and the shaft 1 are connected to each other for conjoint rotation via corresponding splines 20, 10. The elements which ensure the axial fixing of the shaft 1 in relation to the component 2 are the inner ring 3, the outer ring 4, the union nut 5 and the threaded piece 6. The threaded piece 6 has a clearance fit here with respect to the component 2, and therefore the two can rotate relative to each other. The threaded piece 6 sits on the other side on the shaft 1, against which the inner ring 3 is also pressed.

[0053] In the radial direction, the elements are arranged, as seen from the supporting region of the inner ring 3 on the shaft 1, as follows: first of all the inner ring 3, over which the outer ring 4 is arranged. The outer ring 4 is partially surrounded by the threaded piece 6 and is partially directly adjacent to the union nut 5. The threaded piece 6 is in turn surrounded by the union nut 5.

[0054] The inner ring 3 has a tapered or conical outer surface 30 which corresponds to a tapered inner surface 40 of the outer ring 4. Furthermore, the inner ring 3 has an inner surface 31 which is configured for the contacting of the shaft 1. For example, the inner surface 31 is configured in such a manner that it has a coefficient of friction sufficiently high for a connection. Furthermore, the inner ring 3 is configured in such a manner that the inner ring 3 is caused by its axial length to butt against the threaded piece 6 if the mounted state is presentas illustrated in FIG. 1. An incision on the inner side 30 of the ring 3 can also be seen. This is the region from which the segments, to be discussed below, of the inner ring 3 branch.

[0055] In the refinement shown, the outer ring 4 has a first portion 41 and a second portion 42 on the outer side opposite the inner surface 40. The second portion 42 here has such an outer diameter that the second portion 42 fits between the threaded piece 6 and the inner ring 3. The first portion 41 has a larger outer radius and is located axially along the longitudinal axis 7 of the connecting arrangement or of the shaft 7 and of the component 2 between the end side of the threaded piece 6 and an inner side of the end portion 51 of the union nut 5. In order to increase the modulus of elasticity of the outer ring 4 in relation to that of the inner ring 3 and in order to reduce the weight of the outer ring 4, the outer ring 4 has a reinforcement 9.

[0056] The threaded piece 6 has an external thread 60 which is configured in a manner corresponding to the internal thread 50 of the union nut 5, and therefore threaded piece 6 and union nut 5 can be screwed reversibly to each other. Furthermore, the threaded piece 6 has two cup-like portions 62, 63 which each split a common base with a continuous recess. The first cup-like portion 62 here surrounds the component 2 and the second cup-like portion surrounds the arrangement consisting of the inner ring 3 and the outer ring 4, and therefore also the shaft 1. The outer side of the lateral border of the first cup-like portion 62 has a multiedge shape. A recess 65 for a securing ring 80 which likewise rests here in a recess of the component 2 is located on the inner side of the first cup-like portion 62 and therefore also on the inner side 61 of the threaded piece 6. The securing ring 80 secures the component 2 and the threaded piece 6 axially in relation to each other. The second cup-like portion 63 has the external thread 60 on the outer side of the lateral border.

[0057] The union nut 5 has the internal thread 50 and the end portion 51, in which a continuous recess 52 is located. The shaft 1 is guided through the recess 52. The union nut 5 in total surrounds the inner ring 3, the outer ring 4 and part of the threaded piece 6, namely at least the second cup-like portion 63.

[0058] If the union nut 5 is screwed on the threaded piece 6, the inner side of the end side 51 of the union nut 5 acts on the first portion 41 of the outer ring 4 and moves the latter axially along the longitudinal axis 7 in the direction of the threaded piece 6. The tapered outer surface 30 of the inner ring 3 and the tapered inner surface 40 of the outer ring 4 are arranged here with respect to each other in such a manner that the tapers or cones are directed counter to each other. The outer ring 4 is therefore pushed here radially outward on the inner ring 3 since the region of the inner ring 3 with the larger outer diameter faces the threaded piece 6. In addition, the second portion 42 of the outer ring 4 is also pushed under the border of the second cup-like portion 63 of the threaded piece 6. By means of the screwing, the outer ring 4 exerts an axial force on the inner ring 3 which is therefore fastened axially in relation to the shaft 1.

[0059] The variant of the connecting arrangement of FIG. 2 is similar to the variant of FIG. 1, and therefore only the differences are described here. In further refinements (not illustrated here), the differences are combined separately from one another with the variant of FIG. 1.

[0060] The threaded piece 6 and the inner ring 3 are configured as a single part here, and therefore the side edge of the threaded piece 6, which side edge bears the external thread 60, and the inner ring 3 are connected via a common base and have a U-shape, into which the outer ring 4 projects. This refinement means that fewer components are affected during installation and removal. Furthermore, the threaded piece 6 or the unit consisting of threaded piece 6 and inner ring 3 has a further recess 66 in which a seal 77, which is configured here as a sealing ring, is located.

[0061] In the refinement shown, the outer ring 4 has three portions, wherein the first portion 41 is arranged axially along the longitudinal axis 7 between the second portion 42 and the third portion 43. The first portion 41 carries out the task here (as in the variant of FIG. 1) that the union nut 5 can move the outer ring 4 in the direction of the threaded piece 6 via said first portion during the screwing. In an alternative refinement (cf. FIG. 1), the threaded piece 6 and the inner ring 3 are separate components. The third portion 43 projects beyond the union nut 5as seen from the threaded piece. This has the purpose that a securing ring 81, which is located in a securing ring recess 44 of the third portion 43, secures the union nut 5 axially in relation to the outer ring 4. The union nut 5 therefore cannot be unscrewed from the threaded piece 6. In this connection, the end portion 51 of the union nut 5 is fixed in the securing ring recess 44 axially between the first portion 41 of the outer ring 4 and the securing ring 81.

[0062] As an addition, a sealing ring as seal 75 is also situated between the third portion 43 and the inner side of the recess of the end portion 81. A further sealing element 76for example in the form of a sealing ringis additionally arranged here in an associated recess 45 of the third portion 43 between the lower side of the outer ring 4 and the shaft 1.

[0063] The third variant of FIG. 3 and the second variant of FIG. 2 of the connecting arrangement differ from each other in that the third variant does not have a recess for a sealing element in the region of the threaded piece 6.

[0064] FIG. 4 shows the variant of FIG. 1 without the shaft.

[0065] It can be seen that the inner ring 3 consists of a plurality of segments 32 between which a recess 33 is in each case located in an encircling manner and which all emerge from a common, radially encircling base portion 34. The radially encircling groove which is located between the base portion 34 and the segments 32 can also be seen here. The segments 32 make it possible to exert high clamping forces on the shaft without a supporting effect occurring at the inner ring 3.

[0066] The foregoing disclosure has been set forth merely to illustrate the invention and is not intended to be limiting. Since modifications of the disclosed embodiments incorporating the spirit and substance of the invention may occur to persons skilled in the art, the invention should be construed to include everything within the scope of the appended claims and equivalents thereof.