Shaft-hub connection

Abstract

A shaft-hub connection includes an alignment gearing with a plurality of dogs. The dogs comprise a contouring cross-section, which runs, at least partially, along a prolonged trochoid.

Claims

1. A shaft-hub connection comprising: a shaft; a hub; and an alignment gearing having a plurality of dogs formed on an outer circumferential surface of the shaft or on an inner circumferential surface of the hub, wherein the dogs comprise a contour in cross section, which runs, at least partially, along a prolonged trochoid formed along the outer circumferential surface of the shaft or along the inner circumferential surface of the hub.

2. The shaft-hub connection according to claim 1, wherein the prolonged trochoid is a prolonged hypotrochoid.

3. The shaft-hub connection according to claim 1, wherein the prolonged trochoid is a prolonged epitrochoid.

4. The shaft-hub connection according to claim 1, wherein the shaft and the hub can be axially displaced with respect to each other.

5. The shaft-hub connection according to claim 1, wherein the shaft and the hub are pressed together.

6. The shaft-hub connection according to claim 1, wherein at least one of the tooth systems is manufactured by means of non-round turning.

7. The shaft-hub connection according to claim 1, wherein the dogs comprise an undercut.

8. The shaft-hub connection according to claim 1, wherein the alignment gearing comprises stepped areas in the axial direction.

9. The shaft-hub connection according to claim 1 wherein contactless areas are formed in the contour of the dogs.

Description

DRAWINGS

(1) The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not intended to limit the scope of the present disclosure.

(2) Other advantages and features of the disclosure will become apparent from the following description by means of the figures. Herein:

(3) FIG. 1 is a top view of a polygonal profile of a shaft according to the state of the art;

(4) FIG. 2 is a top view of a polygonal profile of a shaft according to the state of the art;

(5) FIG. 3 is a cut view (schematized) of an exemplary embodiment of a shaft-hub profile according to the disclosure;

(6) FIG. 4 is a representation according to FIG. 3 with the representation of the tool flight circle;

(7) FIG. 5 is an enlarged representation of the normal in an exemplary embodiment of a shaft-hub profile according to the disclosure;

(8) FIG. 6 is a representation according to FIG. 5 of an exemplary embodiment comprising an undercut;

(9) FIG. 7a is a cut view of a shaft according to the disclosure;

(10) FIG. 7b is a cut view of a hub according to the disclosure; and

(11) FIG. 7c is a representation of the assembly.

(12) In the figures, the same elements are referenced with the same reference numerals.

DETAILED DESCRIPTION

(13) Example embodiments will now be described more fully with reference to the accompanying drawings.

(14) According to the FIGS. 1 and 2 there are, apart from the standard tooth systems known per se, such as involute gearings, parallel tooth systems or fine serrations, also so-called polygonal tooth systems. Polygonal contours such as the shown ones are known in the state of the art. FIG. 1 exemplarily shows a so-called H6 profile 1, in which a contour having six corners 2 is formed. This cross section for the torque transmission comprises the surface normal 4.

(15) According to FIG. 2, a so-called P3G profile is shown, in which the surface normal 7 is formed.

(16) In the FIGS. 1 and 2, the respective normals are represented as extending over the entire circumference. Here, the course of the normals that is partly extremely unfavourable for a force transmission or a torque transmission is in particular revealed.

(17) In the FIGS. 3 and 4 an exemplary embodiment of a tooth system profile according to the disclosure is shown. The profile 10 comprises dogs 11 having a dog height 13 and interspaces 12, into which profile 10 engages the corresponding counter-profile. The dogs comprise the dog width 14. They are placed between the inner functional diameter 16 and the outer functional diameter 15. In the shown exemplary embodiment the dogs comprise an undercut 17, wherein this one is a tapering in the area of the root. The tool flight circle 18 is shown in fiaccording to FIG. 3. In the shown enlarged image the dog 11 is complemented by the representation of the normals 20 that are represented by means of corresponding rays on the dog surface. It is shown that the normals extend in a highly favourable manner, whereby a particular suitability for the transmission of forces and torques is obtained.

(18) The corresponding representation shown in FIG. 6 shows a dog 11 as well as the radial normals 21. The undercut 17 is especially marked in this representation. It results from the dog's deviation from an at least straight or tangential running-in course. The undercut contour entails the correspondingly described advantages.

(19) An exemplary embodiment is shown in FIGS. 7a through 7c. A shaft 22 is provided with dogs 23, between which the interspaces 24 remain. In the shown exemplary embodiment, the dogs 23 comprise an undercut.

(20) The hub 25 shown in FIG. 7b comprises corresponding recesses 26 and interspaces or dogs 27.

(21) The result of the combination of FIGS. 7a and 7b is the image 7c, wherein it can be seen that the transmission contacts along the normal are optimized.

(22) The shown exemplary embodiment for example shows a friction ring of a brake disk 25 with respect to a central hub body or caliper 22.

(23) The described exemplary embodiments only serve for explanation and are not limiting.

(24) The foregoing description of the embodiments has been provided for purposes of illustration and description. It is not intended to be exhaustive or to limit the disclosure. Individual elements or features of a particular embodiment are generally not limited to that particular embodiment, but, where applicable, are interchangeable and can be used in a selected embodiment, even if not specifically shown or described. The same may also be varied in many ways. Such variations are to be regarded as a departure from the disclosure, and all such modifications are intended to be included within the scope of the disclosure.