FORCE-TRANSMITTING DEVICE AND METHOD

Abstract

A method for forming a press connection between a first component and a second component such that force is transmissible between the first component and the second component. A portion of the first component is oversized relative to a portion of the second component, and the portion of second component is configured to receive the portion of the first component. The method includes applying an adhesive to the portion of the first component and/or to the portion of the second component, the adhesive in an uncured state being configured to reduce a coefficient of friction between the portion of the first component and/or the portion of the second component, pressing the portion of the first component into the portion of the second component to form a press connection, and curing the adhesive or allowing the adhesive to cure.

Claims

1. A method for forming a press connection between a first component and a second component such that a force is transmissible between the first component and the second component, wherein a portion of the first component is oversized relative to a portion of the second component, and wherein the portion of second component is configured to receive the portion of the first component, the method comprising: applying an adhesive to the portion of the first component and/or to the portion of the second component, the adhesive in an uncured state being configured to reduce a coefficient of friction between the portion of the first component and/or the portion of the second component, pressing the portion of the first component into the portion of the second component to form a press connection, and curing the adhesive or allowing the adhesive to cure.

2. The method according to claim 1, including: before applying the adhesive, treating a surface of the portion of the first component and/or a surface of the portion of the second component to increase a coefficient of friction of the surface.

3. The method according to claim 2, wherein the treating comprises phosphating, etching, galvanizing, sandblasting and/or shotblasting.

4. The method according to claim 1, wherein the portion of the first component is a projection and the portion of the second component is an opening, and wherein projection is oversized relative to the opening by 8 to 15‰.

5. The method according to claim 1, wherein the adhesive is an anaerobically curing adhesive and/or a chemically curing adhesive.

6. The method according to claim 1, wherein the force is a torque.

7. A force-transmitting device comprising: a first component including a projection and a second component including an opening, wherein the projection is oversized relative to the opening and inserted in the opening to form a press connection between the projection and the opening wherein a layer of adhesive is provided between the projection and the opening, and wherein the adhesive in an uncured state is configured to reduce a coefficient of friction between the projection and the opening.

8. The device according to claim 7, wherein the projection is oversized by between 8 and 15‰ relative to the opening.

9. The device according to claim 7, wherein the adhesive is an anaerobically curing adhesive and/or a chemically curing adhesive.

10. The device according to claim 7, wherein the projection is hollow and has a cylindrical or conical shape.

11. The device according to claim 7, wherein a surface of the projection and/or a surface of the opening is surface treated to increase a coefficient of friction.

12. The device according to claim 7, wherein a surface of the projection and/or a surface of the opening is phosphated, etched, galvanized, sandblasted and/or shot blasted.

13. The device according to claim 7, wherein the press connection is configured to transmit a torque between the first component and the second component.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0022] FIG. 1 is a schematic view of a force-transmitting device according to a first embodiment of the present disclosure.

[0023] FIG. 2 is a schematic view of a force-transmitting device according to a second embodiment of the present disclosure.

[0024] FIG. 3 is a flow chart for a method for forming a force-transmitting connection between a first component and a second component according to the disclosure.

DETAILED DESCRIPTION

[0025] In the following, identical or functionally equivalent elements are designated by the same reference numbers.

[0026] FIG. 1 shows a device 1 according to a first embodiment that is configured to transmit a force, in particular a torque, from a first component 2 to a second component 4. In FIG. 1, the first component 2 is a conical hollow shaft, and the second component 4 is a hub that includes a bore 6. The cone angle of the first component 2 can, for example, fall between 1 and 89.5 degrees. Alternatively the first component 2 can also have a cylindrical shape.

[0027] In order to form the device 1, the first and second component 2, 4 are connected to each other by a press connection so that the force can be transmitted from the first component 2 to the second component 4 and vice versa. In order to enable the connection between the first and the second component 2, 4 to transmit the force, a diameter of the first component 2 has an oversize compared to the bore 6 of the second component 4. In FIG. 1, the first component 2 has an oversize of at least 5‰, preferably between 8 and 15‰.

[0028] In order to increase the force transmissible from the first component 2 to the second component 4, an adhesive layer 8, which serves as a lubricating layer during assembly, is provided between the first component 2 and the second component 4. In FIG. 1, the adhesive layer 8 is applied in particular in the region in which the first component 2 and the second component 4 will be in contact after the assembly. As can be seen in FIG. 1, the adhesive layer 8 is applied onto both the first component 2 and the second component 4. Alternatively only one of the two components 2, 4 can be provided with the adhesive layer 8.

[0029] During the assembly, the adhesive acts as a lubricating layer that facilitates the formation of the press connection between the first component 2 and the second component 4 by reducing a coefficient of friction between the first and second component 2, 4 through the adhesive layer 8 serving as a lubricating layer. After assembly, the adhesive cures so that the coefficient of friction between the first and the second component 2,4 increases again, and the force transmissible by the press connection is thereby increased, in particular in comparison to a conventional press connection.

[0030] The adhesive used for the adhesive layer 8 is a curing adhesive so that after assembly the coefficient of friction between the first and the second component 2, 4 is increased by the curing. For example, the adhesive can be an anaerobically curing adhesive and/or a chemically curing adhesive and advantageously heat can be used in order to promote the curing of the adhesive.

[0031] FIG. 2 shows a device 1 according to a second embodiment. The device of FIG. 2 differs from the device 1 of FIG. 1 in that the surface 10 of the first component 2 and the surface 12 of the second component 4 that come into contact with each other during the connecting have an increased coefficient of friction. This can be achieved, for example, by a corresponding surface treatment. For example, the surface may be phosphated, etched, galvanized, and/or blasted, in particular sandblasted and/or shotblasted. In FIG. 2, both the surface 10 and the surface 12 are treated. Alternatively, also only one of the two surfaces 10, 12 can be treated. Alternatively or additionally, the adhesive can also be configured to roughen the surfaces 10, 12 and/or to increase the coefficient of friction of the surfaces 10, 12. For example, the adhesive can have etching properties and/or be a filled adhesive, i.e., be an adhesive that is filled with further substances, in particular substances increasing the coefficient of friction.

[0032] FIG. 3 shows a schematic flow chart for a method for forming a force-transmitting connection between a first component 2 and a second component 4. In a first step S1, the method comprises providing the first and the second component 2, 4, in which the first component 2 has an oversize compared to the second component 4. In step S2, lubricant is applied onto the first and/or the second component 2, 4, the lubricant being a curing adhesive. The application of the adhesive can be effected, for example, in a planar or linear manner.

[0033] Then the first and the second component 2, 4 are pressed together in a step S3, and finally in a step S4 the adhesive cures. In order to increase the maximum force that can be transmitted between the first component 2 and the second component 4, the method can furthermore include performing a treatment S5 in the region of the press connection of the surfaces 10, 12 of the first and/or second component 2, 4, in order to increase a coefficient of friction of the surfaces 10, 12. Here the surface treatment can be effected, for example, before applying the adhesive or also during the application of the adhesive—for example, by using an adhesive that can be configured to roughen the surfaces 10, 12 and/or to increase the coefficient of friction of the surfaces 10, 12.

[0034] In summary, due to the use of an adhesive layer 8 as a lubricating layer to facilitate the pressing together of the first and second component 2, 4, the force, in particular a torque, transmissible from the first component 2 onto the second component can be increased. Here it can be made possible in particular that with the dimensions given, the force or the torque that can be transmitted between the first component 2 and the second components 4 can essentially be doubled. This makes possible it possible among other things to also use the described device 1 or the described method for connections in vehicles.

[0035] Representative, non-limiting examples of the present invention were described above in detail with reference to the attached drawings. This detailed description is merely intended to teach a person of skill in the art further details for practicing preferred aspects of the present teachings and is not intended to limit the scope of the invention. Furthermore, each of the additional features and teachings disclosed above may be utilized separately or in conjunction with other features and teachings to provide improved force transmitting devices and methods.

[0036] Moreover, combinations of features and steps disclosed in the above detailed description may not be necessary to practice the invention in the broadest sense, and are instead taught merely to particularly describe representative examples of the invention. Furthermore, various features of the above-described representative examples, as well as the various independent and dependent claims below, may be combined in ways that are not specifically and explicitly enumerated in order to provide additional useful embodiments of the present teachings.

[0037] All features disclosed in the description and/or the claims are intended to be disclosed separately and independently from each other for the purpose of original written disclosure, as well as for the purpose of restricting the claimed subject matter, independent of the compositions of the features in the embodiments and/or the claims. In addition, all value ranges or indications of groups of entities are intended to disclose every possible intermediate value or intermediate entity for the purpose of original written disclosure, as well as for the purpose of restricting the claimed subject matter.

REFERENCE NUMBER LIST

[0038] 1 Device [0039] 2 First component [0040] 4 Second component [0041] 6 Bore [0042] 8 Adhesive layer [0043] 10, 12 Surface region [0044] 10 [0045] S1-S5 Method steps