The present invention relates to a component connection having a first component, a male fixing element formed by at least one sphere and connected to the first component at a connecting point of the first component and projecting from the first component, and a clip element clipped onto the male fixing element in such a fashion that the clip element bears on the at least one sphere.
A component connection of this type is known from U.S. Pat. No. 2,275,900 A. The technical background of the invention includes DE 10 2011 018 525 A1; U.S. Pat. No. 2,266,049 A; DE 10 2011 053 786 A1; DE 36 00 311 A1; DE 34 41 349 A1 as well as the older DE 10 2013 218 650.9, which was not previously published.
DE 10 2013 218 650.9 proposes a component connection comprising a first component and a male fixing element projecting therefrom, onto which a claw-like clip element is clipped. The male fixing element is formed by two spheres welded to each other, with “the lower sphere” being clipped onto the first component. With the clip element, a second component, which is placed onto the first component and has a hole through which the male fixing element extends, can be fixedly clipped to the first component.
For the stability of such a clip connection, it is extremely important that the “height” of the male fixing element, that is to say, the diameter of the spheres of the male fixing element and the thickness of the second component, are geared to each other such that radial inner ends of tongue-like clamping elements of the clip element bear from the outside on the male fixing element in a region below the equatorial plane of the “upper sphere” of the male fixing element.
The object of the invention is to provide a component connection where a male fixing element with a specified “sphere diameter” is suitable for a multitude of possible applications.
This and other objects of the invention are achieved in accordance with embodiments of the invention.
The starting point of the invention is a component connection comprising a first component and a male fixing element projecting therefrom. The first component can be a metal component, for example, in particular a sheet metal component or a plastic component, in particular a fiber-reinforced plastic component.
The male fixing element has at least one sphere (used herein to also reference at least one spherical or spherical-like section), which is connected to the first component at a connecting point of the first component and projects therefrom. In particular, the male fixing element can be formed by a so-called “double sphere”, that is to say, by two directly interconnected spheres or two directly interconnected spherical or spherical-like sections, of which the “lower spherical section” or “the lower sphere” is connected to the first component.
Clipped onto the male fixing element is a clip element, which, for example, can be configured as a fastening claw according to the type described in DE 10 2013 218 650.9 mentioned earlier. Such a clip element bears obliquely from below on the outside of the at least one sphere or the at least one spherical or spherical-like section in a region between an upper side of the first component and an equatorial plane of the at least one sphere or the at least one spherical or spherical-like section.
In accordance with the invention, the connecting point at which the male fixing element is connected to the first component is developed as a local elevation or as a local depression. Due to the “height” of the local elevation or local depression, it is possible to adjust how far the male fixing element projects from the first component (relative to a level located radially slightly “outside” of the local elevation or local depression) when using a specified “sphere diameter.”
As far as the first component consists of a ductile material, such as steel or aluminum, for example, the local elevation can be developed as an “outward pressing” or the local depression can be developed as an “inward pressing” of the first component. The local elevation or the local depression can also be created by locally forming the first component. For example, if the first component is a sheet metal component formed by deep drawing, the local elevation or the local depression can be created during the pressing or deep drawing process in the pressing or deep drawing tool. In as far as the first component is a plastic component, such as, for example, an injection molding component, the local elevation or depression can be created directly during the forming, that is to say, in the forming tool.
According to an aspect of the invention, it is provided that the at least one sphere or the at least one spherical or spherical-like section of the male fixing element bears directly on the connecting point or is connected to the first component directly at the connecting point. The male fixing element is firmly bonded, for example, to the connecting point of the first component, in particular welded to it.
Alternately, it may also be provided that at least one sphere or at least one spherical or spherical-like section of the male fixing element is pressed into the material (for example, into the elevation or depression) of the first component and therefore into the first component. This is done in such a fashion that the at least one sphere or the at least one spherical or spherical-like section of the male fixing element is connected to the first component in a form-fitted manner. The at least one sphere or the at least one spherical or spherical-like section of the male fixing element does not have to be completely pressed into the first component, but can also be pressed in only partially, that is to say, a part of the second sphere or the second spherical or spherical-like element that is not pressed in may project from the first component after the pressing in.
Pressing the at least one sphere or the at least one spherical or spherical-like element into the first component results in a flow of the material of the first component and/or the material of the second sphere or the second spherical or spherical-like element, such that the aforementioned form fit results between the sphere or the spherical or spherical-like element and the first component. “Pressing in” therefore means that material of the first component and/or the sphere or the spherical or spherical-like element flows rather than, for example, the sphere being clamped into a recess of the first component.
According to a further aspect of the invention, it is provided that the material of the sphere or the spherical or spherical-like element or the material of the complete connecting element is harder or at least as hard as the material of the first component.
Experiments have shown that a connecting element according to the invention can be pressed into a first component in such a manner that the material of the first component flows in such a fashion that it encompasses the sphere or the second spherical or spherical-like element of the connecting element at least partially in a form-fit, similar as is the case with the joint socket of a ball joint.
Preferably, a sphere or a spherical or spherical-like element of the male fixing element is pressed into the first component in such a fashion that the material of the first component extends up to a region above the equatorial plane of the sphere or the spherical or spherical-like element of the fixing element and is adapted closely to the sphere or the spherical or spherical-like element of the fixing element. Preferably, the material of the first component is adapted to a sphere or a spherical or spherical-like element of the fixing element over a complete circumference of the sphere or the spherical or spherical-like element of the fixing element.
In this way, a form-fitting and essentially inseparable connection is achieved between the sphere or the spherical or spherical-like element and the first component.
According to a further aspect of the invention, the sphere or the spherical or spherical-like element is pressed into the first component in such a fashion that it does not intersperse the first component. It may be provided that the first component is bulged in the region of the sphere or the spherical or spherical-like element at the side facing away from the component.
Experiments have shown that pressing in the sphere or the spherical or spherical-like element of the connecting element not only allows achieving a highly stable, but also high-quality, tear-free connection between the sphere or the spherical or spherical-like element and the first component, which in terms of its production quality is comparable to a high-quality produced and reworked welded connection.
As already mentioned, the male fixing element can be developed by two or more interconnected spheres or spherical sections (double sphere or multiple spheres).
The individual spheres or spherical or spherical-like sections can be arranged in one line back to back like a string of pearls, for example. However, it can also be provided that one or a plurality of spheres or spherical or spherical-like sections projects from one or a plurality of other sphere(s) or spherical or spherical-like sections.
It may be provided that the clip element has a greater radial width than the local elevation or local depression that forms the connecting point. This means that the clip element then projects in radial direction over the local elevation or local depression.
With this type of clip element, a second component can be clipped to the first component. It may be provided that the second component has a hole through which the male fixing element projecting from the first component extends. The clip element clipped onto the male fixing element is supported on the one hand from below on the outside at the male fixing element or at a sphere or a spherical section of the male fixing element, and on the other hand at a top side of the second component which faces away from the first component, which causes the second component to be pressed against the first component. Preferably, the clip element extends radially to the outside far enough that it reaches into the through-hole provided in the second component.
It may be provided that a transition region between the local elevation or the local depression and a region located radially outside the local elevation or local depression of the first component is developed conically. A conical development of the transition region is of advantage in particular with a local elevation because a conical development of the transition region reduces the risk of a canting of the second component during placement on the first component. The through-hole provided in the second component can slide at the conical transition region from the local elevation downward until it bears on the top side of the first component. Furthermore, it can be provided that the transition region and/or the male fixing element on the one hand, and the through-hole provided in the second component on the other hand, form a “type of fit.” This leads to a form fit between the second component and the elevation or the male fixing element, which fixes the two components in transverse direction relative to one another.
In particular, the invention can be used in connection with a “claw-like fastening element” (also referred to as “fastening claw” in the following). Such a claw-like fastening element has an annulus section, from the radial inner side of which at least two, preferably three or four flexible, tongue-like elements project obliquely inward at the top in the direction of a top side of the fastening claw.
The tongue-like elements have free ends. The free ends of the tongue-like elements border or define a center open region of the fastening claw. From a lower side of the fastening claw, a fixing element can be introduced and inserted between the free ends of the tongue-like elements. The fixing element can be a fixing element having a spherical or sphere-like head. However, in principle, other designs of fixing elements are contemplated as well, which can be introduced into the center open region of the fastening claw.
The tongue-like elements mentioned earlier are separated by slots that extend from a region near the annulus section essentially radially inward. It may be provided that radial outer ends of the slots provided between the tongue-like elements are rounded out.
Furthermore, it may be provided that the tongue-like elements taper towards their free ends. The free ends of the tongue-like elements can be developed convexly rounded off, for example. Alternately, the free ends of the tongue-like elements can also be developed straight in such a fashion that they extend “tangentially” relative to the center open region of the fastening claw. Alternately, it may be provided that the free ends of the tongue-like elements are developed concavely. A concave design of the free ends of the tongue-like elements has the advantage that they, as far as the fixing element clamped between them is developed round, can adapt to its outer contour.
According to a further aspect of the invention, the tongue-like elements project obliquely from the annulus section. “Obliquely” means that each of the tongue-like elements encloses a certain angle with the plane formed by the annulus section. Experiments have shown that it is advantageous if said angle is in a range of 10° to 40°. Especially advantageous are angles in a range of 20° to 30°. In a specific exemplary embodiment, for example, it may be provided that the angle enclosed by the tongue-like elements with the annulus section, is 28° or more.
According to a refinement of the invention, the tongue-like elements are arranged evenly distributed in circumferential direction of the annulus section. In particular, they may be designed identically. As already mentioned earlier, at least two tongue-like elements are provided. Under stability aspects, it is favorable if exactly three or exactly four tongue-like elements are provided. In principle, however, it is also possible to provide five or more such tongue-like elements.
The fastening claw can be made of metal, in particular of sheet metal. For example, it can be punched from steel sheet metal, with the tongue-like elements being bent open as described earlier.
According to a further aspect of the invention, a plurality of “screen ring sections”, which are arranged in circumferential direction of the annulus section, project from the annulus section radially outward. In the circumferential direction, two each back to back screen ring sections are separated by a screen ring slot extending in a radial direction. The screen ring sections provide the fastening claw with additional elasticity. The screen ring sections have a similar function as leaf springs or disk springs, which is to say, in the mounted state, they press the fastening claw against a component.
Radial inner ends of the screen ring slots can be rounded out.
According to a further aspect of the invention, it is provided that the screen ring slots are offset in the circumferential direction relative to the slots provided between the tongue-like elements.
Preferably, the screen ring sections project obliquely downward from the annulus section, which results in a “hat-like form” of the fastening claw.
It may be provided that the number of screen ring sections is equal to or greater than the number of the tongue-like elements.
In as far as the fastening claw is made of steel, it is advantageous that it is case-hardened. Furthermore, it may be provided that the fastening claw is coated with a coating material, such as, for example, with an anticorrosive coating and/or with an electrically insulating coating.
Alternately to metal, the fastening claw can also be made of plastic, for example. What is important is that the fastening claw has a certain minimum elasticity.
According to a further aspect of the invention, it is provided that the fastening claw is a separate connecting element and not an integral component of another component or another part. However, the latter is also definitely not ruled out. It goes without saying that the fastening claw can also be an integral component of another component or another part, or it can be connected to another component or another part.
A further aspect of the invention is a component connection with a fastening claw as the one described above. Such a component connection has a (first) component with a male fixing element projecting from the first component. The male fixing element can be broken down into a first section and into a second section, which is connected to the first section or follows the first section. Via the first section, the male fixing element is connected directly to the first component. The male fixing element can be connected to the first component via the first section, for example in one piece, or it can be welded to the first component or connected to the first component in another way. According to the invention, the second section, which connects to the first section, has the form of a sphere or a sphere-like form.
The first section can also have the form of a sphere or a sphere-like form. In that case, the male fixing element is formed by two connected spheres or spherical elements (so-called “double sphere”), which are welded together, for example.
However, this does not necessarily have to be the case. The first section could also be formed like a peg or a cylinder or the like, for example. The second spherical or spherical-shaped section preferably projects like a head from the first section.
The fastening claw is clipped onto the male fixing element, in particular on its spherical or sphere-like second section, in such a fashion that the free ends of the tongue-like elements bear obliquely from below on the spherical or sphere-like section in a region between a top side of the first component and an equatorial plane of the spherical or sphere-like section. Because of said bearing position below the equatorial plane, a form fit or an undercut is obtained, which means that in principle, the fastening claw can be pulled off the male fixing element only by destroying the fastening claw or by way of a suitably designed special tool.
According to a further aspect of the invention, it is provided that the component connection has a second component, which in turn has a through-hole through which the male fixing element extends.
It may be provided that at least the annulus section and/or the screen ring sections bear on the second component in a region of the second component that is near the through-hole (spring-like) at a second side of the second component facing away from the first component. The annulus section and/or the screen ring sections therefore resist a pulling off of the second component from the first component. Because of the form of the fastening claw, a pull-off force acting on the second component is transformed into forces that act in the longitudinal direction of the tongue-like elements and which are supported at the free ends of the tongue-like elements by the second, spherical or sphere-like section of the male fixing element. This results in a self-restraint that counteracts the pull-off force.
The component connection according to the invention can be used in a variety of technology fields. Various applications are contemplated, for example, in automotive engineering, in particular in automotive body construction. Accordingly, the first and/or the second component can be a first or second automotive body part, for example.
Other objects, advantages and novel features of the present invention will become apparent from the following detailed description of one or more preferred embodiments when considered in conjunction with the accompanying drawings.
It should be noted in advance that all technical features shown in
Alternately, it may also be provided that the sphere 2a is pressed into the material of the first component 1 at least far enough that a form-fitting connection between the sphere 2a and the first component 1 is obtained. The pressing in can occur in a pressing or deep drawing tool, in which or by means of which the first component is formed. The pressing in of a sphere, or a sphere of a “double sphere”, is an alternate fastening option that exists not only with the exemplary embodiment shown in
A second component 4 is placed on the first component 1. The second component 4 has a through-hole 5, the diameter of which is greater than the diameter of the two spheres 2a, 2b of the male fixing element 2. The male fixing element 2 projects through the through-hole 5, with the sphere 2b being located completely on the top side 4a of the second component 4, which faces away from the component 1.
The two components 1, 4 are clamped together by way of the male fixing element, which is developed here as a “double sphere,” and a fastening claw 6. The fastening claw 6, which is only schematically represented in
In
Proceeding from the initial position, the fastening claw 6 is pressed onto the sphere 2b with a force F, which causes the tongue-like elements 8a, 8b to bend elastically upward, as shown by arrows 9a, 9b. Free ends 8c, 8d of the tongue-like elements 8a, 8b slide downward at the outer circumference of the sphere 2b via its equatorial plane 10.
When the fastening claw 6 and its annulus section 7 bear on the top side 4a of the second component 4, the tongue-like elements 8a, 8b project obliquely upward from the annulus section 7, with the free ends 8c, 8d of the tongue-like elements 8a, 8b bearing on the outer circumference of the sphere 2b obliquely from below in a region between the top side 4a of the second component 4 and the equatorial plane 10 of the sphere 2b. This results in a form fit.
A pulling off of the second component 4 from the first component, which is indicated by the force F1, is blocked by the fastening claw 6. The pulling off force F1 is transferred over the annulus section 7 to the fastening claw and is introduced into the sphere 2b of the male fixing element 2 and supported by the same via the tongue-like elements 8a, 8b in the longitudinal direction of the tongue-like elements 8a, 8b and/or via their free ends 8c, 8d. Because the tongue-like elements 8a, 8b do not bend upward on their own, a pulling off of the second component 4 from the first component 1 is prevented.
Experiments have shown that it is favorable if, as shown in
In the exemplary embodiment shown in
For the sake of completeness, it should also be mentioned that the free ends 8c, 8d (see
As shown in
Analogously to the previous exemplary embodiments, a second component 4 is placed on the first component 1. The second component 4 has a through-hole 5, the diameter of which is larger than the diameter of the male fixing element 2. The male fixing element 2 projects through the through-hole 5. Because of the elevation 1, in the exemplary embodiment shown in
Analogously to the previous exemplary embodiments, the two components 1, 4 are clamped together by way of the male fixing element 2 and the fastening claw 6 clipped onto said male fixing element. The fastening claw 6, which is represented only schematically in
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.
Number | Date | Country | Kind |
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10 2014 211 650.3 | Jun 2014 | DE | national |
This application is a continuation of PCT International Application No. PCT/EP2015/063083, filed Jun. 11, 2015, which claims priority under 35 U.S.C. §119 from German Patent Application No. 10 2014 211 650.3, filed Jun. 18, 2014, the entire disclosures of which are herein expressly incorporated by reference.
Number | Date | Country | |
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Parent | PCT/EP2015/063083 | Jun 2015 | US |
Child | 15381207 | US |