DE102021121318A1 - Connection system of a first component and a second component - Google Patents

Abstract

The invention relates to a method and a device for fixing a first component with a connection system (1) to a second component, the first component being fixed to a displacement element (2) of the connection system (1). A fixing element (3) of the connection system (1) is arranged with an expanding section (9) in a component recess of the second component, with the displacement element (2) being displaced into the expanding section (9) of the fixing element (2) in an assembly step. The connection system (1) has a spring device (4) connected to the displacement element (2) and having a deformable spring element (17), the spring element (17) being deformed against its spring action and being attached to the fixing element (3) and to a a retaining section (8) formed retaining device (15) supports. In the assembly step, the spring element (17) produces a spring effect which causes a force on the displacement element (2) directed in the direction of the expanding section (9).

Description

The invention relates to a method for fixing a first component with a connection system on a second component, with the first component being fixed on a displacement element of the connection system, with a fixing element of the connection system being arranged with an expanding section in a component recess of the second component and with Assembly step, the displacement element is displaced in the fixing element in a longitudinal direction in the spreading section of the fixing element and thereby spreading elements of the fixing element are deflected or deformed or blocked, so that the fixing element is fixed in the second component.

Various methods are known from the prior art in which a first component and a second component can be fixed to one another with the aid of a connection system. By using a connection system that enables mechanical fixing, rapid and reliable assembly can be carried out and time-consuming fixing can be avoided, as would be required, for example, when components are glued or welded. In addition, a production-related tolerance when fixing two components to one another can also be compensated for with a suitable connection system.

In many cases, the connection system has two components, which are each attached to one of the two components to be connected and can be connected to one another during or afterwards. In a first step, a displacement element of the connection system is often attached to a first component, while a fixing element of the connection system is attached to the second component. By displacing the displacement element in a longitudinal direction of the connection system, the displacement element is inserted into an expanding section of the fixing element, as a result of which the fixing element is deformed or blocked in the expanding section and the fixing element is fixed in the second component. Depending on the configuration of the component recess and the expansion section, the fixing element can be fixed in the second component in that the displacement element deforms or deflects expansion elements in the expansion section radially outwards, so that the expansion elements are pressed against an inner wall in the component recess designed as a bore or reach behind an opening edge of the component recess of a thin or plate-shaped second component and thereby fix the fixing element in or on the component recess in the second component. It is also possible that expansion elements are deformed radially inwards when the expansion section of the fixing element is inserted into the component recess in the second component and that a restoring force is already generated via the elasticity of the material of the expansion elements, which forces the expansion elements radially outwards and against the inner wall of the component recess or behind an opening edge of the component recess. As a result of the displacement of the displacement element, the expansion elements deformed or deflected during the introduction of the expansion section into the component recess are then pressed outwards and blocked, and the contact pressure directed radially outwards is thereby increased in such a way that the expansion section of the fixing element is reliably fixed in the second component.

Various configurations of connection systems are known from practice, with which two components can be fastened to one another. If a simple method for fixing the two components is implemented, it can often not be ruled out that in the course of intended use a certain amount of play will develop due to changing mechanical loads on the two components and their connection and that the two components can be displaced relative to one another , without the two components becoming detached from one another. Such a game can not be avoided with the currently known connection systems or only with a very significant installation effort.

It is therefore considered the object of the present invention to provide a method with which a first component and a second component can be fixed to one another in a simple manner and reliably over a long period of use.

The object is achieved in that the connection system has a spring device connected to the displacement element with a deformable spring element, the spring element being deformed in a pre-assembly step against its spring action and being supported on the fixing element and on a retaining device formed on a retaining section, and that in During the assembly step, the spring element generates a spring effect which causes a force on the displacement element directed in the direction of the expansion section.

After the displacement element has been displaced in the assembly step, the spring element of the spring device causes the displacement tion element is subjected to a spring action and the displacement element is pressed into the expansion section of the fixing element. Due to the pressure forces continuously exerted on the displacement element, the first and the second component can be fixed to one another without play. With a connection system already preassembled by the manufacturer, the connection system can be connected to the first and second component in a simple manner, and after the components have been connected to the connection system in the assembly step, a play-free connection of the two components can be achieved. The connection can be closed in just a few simple steps. The spring action supports assembly of the connection system or displacement of the displacement element during the assembly step, so that less effort is required and the displacement element is displaced into the intended assembly position by a spring force of the spring device. Depending on the design of the spring device, the displacement element is pressed or pulled into the expanding section of the fixing element.

According to an advantageous embodiment of the inventive idea, it is provided that the displacement element is displaced by a force acting on the head section, with a restraining force of the restraint device being overcome, so that a foot section of the displacement element is displaced along the longitudinal direction from the restraining section into the spreading section.

In the assembly step, the displacement element can be displaced in the longitudinal direction by applying a force to the head portion of the displacement element protruding from the fixing element. The displacement element can be displaced by mechanical pressure, for example exerted by hand, or by hitting the head section, as a result of which the connection system connects the first and second components to one another without play. It is provided that in a pre-assembly step that precedes the assembly step, the head section of the displacement element is connected to the first component and the fixing element is connected to the second component with the aid of the expanding section.

In the pre-assembly step, the connection system can first be connected to the first component or to the second component in any order. Advantageously, the connection system with the spring device is already preassembled at the factory, so that the connection system can be used in a simple manner for fastening the two components without the spring device having to be prestressed after it has been fixed to one component or to both components, which makes the assembly step more complex to carry out were.

Advantageously, the invention provides that the spring action of the spring element in the assembled state is greater than the forces occurring between the first and second component when used as intended, so that the first component is permanently fixed on the second component without play, even without a form-fitting fixing of the both components together is necessary.

The spring action of the spring element is designed in such a way that the first and the second component can be fixed to one another without play. The spring force of the spring element is preferably dimensioned in such a way that no play forms between the first and the second component as a result of vibrations or impacts that occur and the two components can be securely fixed to one another. For many applications, it is considered advantageous and sufficient if the spring device exerts a spring force of more than 30 N, preferably more than 50 N, as contact pressure on the two components after the assembly step. A spring force of this magnitude is usually sufficient to connect two components to one another in a vehicle, so that, for example, an interior paneling can be fixed to a frame element. Despite the very simple assembly, in which only the two components have to be fixed to the connection system and the displacement element then has to be moved in the direction of the fixing element in the assembly step, the two components are fixed to one another without play over a long period of use and unwanted rattling or vibration of one of the two components is avoided.

The invention also relates to a connection system for connecting a first component to a second component, the connection system having a displacement element and a fixing element, the displacement element having a head section for connecting the displacement element to the first component, the displacement element having a foot section opposite the head section , wherein the fixing member has a displacement recess extending in a longitudinal direction from an upper side to an opposite underside and penetrating the fixing member, wherein the fixing member has a retaining portion and a spreading portion along the longitudinal direction, wherein the Spreading section is set up to fix the fixing element in a recess on the second component, with the displacement element being arranged with the foot section in the retaining section of the fixing element in a pre-assembly state of the connection system, and with the displacement element being displaced in the longitudinal direction in an assembled state of the connection element in such a way that that the foot section of the displacement element is arranged in the expansion section and the fixing element in the expansion section is deformed or blocked in a direction transverse to the longitudinal direction, so that when the fixing element is arranged as intended in the recess, the fixing element is fixed in the recess with the aid of the expansion section.

Connection systems are known from the prior art, with the aid of which a first component can be fixed to a second component. A displacement element of the connecting device is arranged with a head section on the first component, while a fixing element of the connecting device is fastened with an expanding section in a recess of the second component.

In this case, the fixing element has a fixing recess with a retaining section and an expanding section. In a pre-assembly state, the displacement element is arranged with the foot section in the retaining section of the fixing recess. By actuating the displacement element, it can be displaced with the foot section from the restraining section into the spreading section. By introducing the foot section into the spreading section, the fixing element can be deformed in a region of the spreading section, as a result of which the fixing element can be fixed in a clamping manner in a component recess of the second component. However, this clamping type of connection of a first and a second component to one another is susceptible to vibrations and to tensile or compressive forces acting on the connecting element, which can lead to loosening of the connection. The play between the first component and the second component caused by the loosening of the connection system can lead to a "rattling" of the connection, which can also damage the individual components themselves or other elements connected to the components.

It is therefore also considered an object of the present invention to provide a connection system that can be easily installed and then reliably holds two components together so that the two components are fixed to one another without play despite vibrations and shock loads occurring during intended use.

This object is achieved in that the connection system has a spring device connected to the displacement element and having a deformable spring element, the spring element being deformed in the pre-assembly state against its spring action and being supported on the fixing element and on a retaining device formed on the retaining section, and that in the assembled state, the spring element generates a spring effect, which causes a force directed in the direction of the expansion section on the displacement element.

The use of a spring device makes it possible for the first and the second component to be permanently fixed to one another without play. For this purpose, the spring element of the spring device can be arranged on the displacement element and, in the pre-assembly state, can be supported by the retaining device and the fixing element. When the displacement element is displaced, a restraining force of the restraining device can be overcome, whereby the spring element supported on the fixing element produces a spring effect which pushes the displacement element and thus the foot section of the displacement element in the direction of the expanding section
relocated.

Due to the deformation of the spring element generated in the pre-assembly state, the displacement element is pretensioned with a spring force in the direction of the fixing element and is displaced in the same direction as the spring force during assembly. The clamping connection of the fixing element to the second component is therefore achieved on the one hand by the mechanical displacement of the displacement element, for example by a compressive force exerted on the displacement element, and on the other hand is reinforced by the spring element and held in position as soon as the connection system is in the assembled state and thus the pressure forces exerted on the displacement element exceed the restraining forces of the restraining device. The preloaded spring element can prevent loosening of the connection of the first and second components by constantly pushing the displacement element towards the fixing element, so that unwanted gradual loosening and thus unwanted play of the first and second components can be avoided during the service life.

According to an advantageous implementation of the idea of the invention, it is provided that the spring element has a degressive spring effect. A more degressive spring action is understood to mean a spring element with a degressive characteristic curve, in which the spring force in the area under consideration does not behave linearly with respect to the deformation of the spring element, but instead the spring force decreases with increasing deformation. A suitable specification of the degressive spring effect can ensure that during assembly and in particular after the fixing element has been fixed in the second component, a high spring effect is exerted on the connection system and the displacement element is pressed with a large spring force in the direction of the expanding section, while the spring element deformed against the spring action in the pre-assembly state does not generate an excessively high spring action and therefore does not unintentionally trigger and shift the displacement element without the fixing element already being arranged in the second component.

Advantageously, the invention optionally provides that the spring element of the spring device has at least one leaf spring, the at least one leaf spring being supported with a leaf spring base on the displacement element and with opposite ends of the leaf spring on the fixing element. A leaf spring is understood to mean, for example, a strip-shaped spring or a spring composed of several layers made of an elastically deformable material, which deforms during elastic deformation and returns to its initial state after the deforming force has ceased. For example, a bending moment acting on the leaf spring can lead to a bending stress. The at least one leaf spring can be arranged and fixed on a lateral surface of the displacement element, with the at least one leaf spring being supported on the fixing element with the opposite ends of the leaf spring. The ends of the at least one leaf spring are deflected in such a way that there is a spring effect in the direction of the expanding section of the fixing element. The at least one leaf spring can also have a leaf spring base recess on the leaf spring base, through which the displacement element can be guided and thereby attached to the leaf spring. A suitable configuration of the at least one leaf spring allows a spring characteristic for the spring effect desired as a function of the deformation to be predetermined in a simple manner.

In addition to using a single leaf spring, several leaf springs can also be attached to the displacement element, so that the spring force exerted on the displacement element can be as uniform as possible in order to be able to prevent the displacement element from tilting due to a force directed in one direction. In addition to being configured as at least one leaf spring, the spring element can also have other configurations of the spring element as a torsion spring, disc spring, volute spring, ring spring, but also as a rubber spring or gas spring or a combination of different spring types

According to an advantageous embodiment of the inventive concept, it is provided that the restraining device has latching elements which run in a direction transverse to the longitudinal direction and are spaced apart from one another in the longitudinal direction and on which the spring element rests and can be retained. The locking elements are preferably designed in such a way that the spring element is supported or retained on the locking elements in the pre-assembly state and cannot unintentionally deform and thereby displace the displacement element. In the case of a desired displacement of the displacement element in the longitudinal direction that is forced by an additional force, the spring element connected to the displacement element can be displaced from one latching element to an adjacent latching element, or in the event of a force which is greater than the restraining force of the restraint device, all latching elements in the longitudinal direction happen. Each of the latching elements arranged adjacent to one another can have a different size of restraining force, which increases, for example, so that the position of the spring element on the latching elements can be specified with the magnitude of the force acting on the displacement element, whereby the position of the spring element also determines the position of the foot section can be specified in the spreading section.

The latching elements can be designed as beads which project at an angle to a side wall of the fixing element and which extend in a transverse direction arranged adjacent to one another. Furthermore, the latching elements can be formed as edges aligned adjacent to one another, which are formed by two planes meeting at an angle.

It is also possible and optionally provided according to the invention for the fixing element to be designed to be elastically deformable in a region around the locking elements, so that the locking elements are preferably deformed when the spring element of the displacement element that is in engagement with the locking elements is displaced and the spring element can be displaced along a latching element.

A region of the fixing element that is designed elastically around the locking elements allows the spring element fixed on the displacement element to be displaced along the locking elements with as little friction as possible, since in this way the locking elements can give way to the spring element in order to prevent wear of the locking elements when the force acting on the locking elements of the displacement element exceeds a predetermined force.

The area around the locking elements can consist of a flexible, elastically deformable material such as an elastomer, a thin-walled and flexible metal or another suitable material. The area around the locking elements can consist of a different material or a different material mixture than the material surrounding the elastic area. The fixing element can taper in the elastic area and thus have a smaller wall thickness in order to enable elastic behavior in the elastic area.

The configuration of the elastic area, in addition to the configuration of the latching elements, allows the necessary force acting on the displacement element along a longitudinal direction to be predetermined, which force is necessary to displace the displacement element along the latching elements.

Provision is preferably made for the displacement element to be arranged in a fixing recess of the fixing element so as to be non-rotatable in the circumferential direction about the longitudinal direction. By arranging the displacement element in the displacement recess in a torsion-resistant manner, twisting and undesired wobbling of the displacement element in the recess can be prevented. Furthermore, the position of the displacement element in the recess can be specified and fixed. For a non-rotatable arrangement of the displacement element, the displacement element can have a suitable shape which prevents or reduces twisting. Furthermore, another device can be attached, which makes this possible.

Furthermore, it is possible and optionally provided according to the invention for the displacement element to have a cross-sectional shape at least in sections and for the fixing recess of the fixing element to have a shape adapted thereto. By using an at least partially cross-shaped cross-section of the displacement element and by adapting the fixing recess with a likewise cross-shaped recess, rotation and also undesired pivoting of the displacement element about its own longitudinal axis can be avoided. In addition to a cross-shaped cross section, other non-rotationally symmetrical shapes are also possible, such as displacement elements with a cross-sectional area that deviates at least in sections from a circular cross-sectional area. The displacement element can furthermore have a non-rotationally symmetrical shape only in sections in the longitudinal direction. For example, the displacement element can be connected to and supported on the fixing element with a cross-shaped cross-section only at two regions of the retaining portion, while the displacement element has a cross-section otherwise deviating from a cross-shaped cross-section along its longitudinal direction.

The displacement element can furthermore have an area which is suitable for fixing the spring element to the displacement element, including in particular a tapering of the displacement element.

Advantageously, according to the invention, it is optionally provided that the foot section has a tip that protrudes into the expansion section in the pre-assembly state without deforming or blocking the fixing element in the expansion section. When the foot section of the displacement element is designed with a tapering tip, the area of the foot section with the tip can be located in the area of the expanding section in the pre-assembly state, but does not deform or block it. This can be achieved in that the part of the foot section that protrudes into the expansion section has a smaller outside diameter than the inside diameter of the expansion section. With a further displacement of the displacement element in the direction of the expansion section, at least one area of the foot section can enter the expansion section, which has a larger outer diameter than the inner diameter of the expansion section, with an area of the fixing element being deformed in the expansion section or being deflected radially outwards in some areas, and the fixing element can be pressed with the aid of the deformed expansion section against the cutout or against the inner walls in the component cutout of the second component and can thereby be fixed in the component cutout.

Provision is preferably made here for the tip of the foot section to protrude over the expansion section and thus over the fixing element in the pre-assembly state. As a result, incorrect operation of the connection system, which can frequently occur with conventional connection systems, can be prevented in a simple manner. Such connection systems are often used to connect a first component to a second component in such a way that the fixing element is covered by the first component during assembly and is no longer visible after proper assembly. If the fixing element is not visible during assembly of the fixing element on the second component, it may happen that the expansion section of the fixing element is not inserted or not sufficiently far into the component recess of the second component before the displacement element is actuated and displaced. Reliable fixing of the first component to the second component is then no longer possible without the fixing element being removed and prepared again, and then at least the assembly step being carried out again. Since the displacement element protrudes beyond the fixing element on both sides when the tip of the foot section protrudes beyond the spreading section, the displacement element can only be actuated and displaced with the head section in the direction of the spreading section if the area behind the tip of the foot section is free and the tip is not as in the case of incorrect positioning, it rests laterally next to the component recess on the surface of the second component.

According to an advantageous implementation of the idea of the invention, it is provided that the foot section has a tip that tapers in diameter. A tapered tip formed on the root portion of the displacement member easily facilitates the displacement member to be inserted and placed in the fixing member during pre-assembly. For this purpose, the tip of the displacement element can be inserted into the fixing recess, with the shape of the tip being able to avoid or at least greatly reduce a possible tilting during insertion. The tapering tip can taper to a point, or be implemented as a truncated cone, with the top surface forming a plane. If the tip protrudes beyond the spreader section, the protruding tip of the foot section promotes reliable positioning of the tip and thus also of the adjacent spreader section of the fixing element in the component recess of the second component, which makes assembly considerably easier. In particular, positioning and assembly of the fixing element in the second component, which may be concealed by the first component, can then also be carried out quickly and reliably. With a suitable configuration of the tapering tip, an advantageous self-centering behavior of the displacement element can be enabled both when it is inserted into the fixing element and when it is inserted into the component recess in the second component.

According to an advantageous embodiment of the idea of the invention, it is provided that on the tapering tip in the longitudinal direction, several formations are arranged in the shape of a cross and protrude in the transverse direction. Cross-shaped protruding formations can be produced in a simple manner and can cause large deformation forces in different horizontal spatial directions without being excessively deformed themselves.

It is also possible and optionally provided according to the invention for the expansion section to be elastically deformable. In contrast to plastic deformation and thus permanent deformation of the fixing element in the expansion section, an elastically deformable expansion section makes it possible for the connection system to be reused and used for another application. The spreader section can consist of an elastically deformable elastomer, for example, which returns to its original position after the foot section has been displaced from the spreader section and can then be elastically deformed again by inserting the foot section into the spreader section.

Provision is preferably made for the expansion section to have at least one expansion element formed on the fixing element in the longitudinal direction, the at least one expansion element being deflectable or deformable in the transverse direction by the displacement element.

The at least one spreading element can be implemented as a tongue formed on the fixing element in the region of the spreading section. The tongue is preferably designed in such a way that the tongue is either completely elastically deformable or is deformable in a region of a tongue base, with the tongue end opposite the tongue base being deflectable. The spreading section preferably has a plurality of spreading elements designed as tongues, which are set up to deflect into the spreading section when the foot section is displaced and a uniform one in a transverse direction exert directed pressure to allow stress-free storage of the fixing element in the recess of the second component.

Furthermore, it is possible and optionally provided according to the invention that a distance from the top to the bottom of the fixing element is less than a length of the connecting element. It can thus be achieved that the displacement element protrudes on the upper side and/or on the underside of the fixing element, it being possible for the displacement element to assume different positions within the recess. A distance between the first and the second component can thus be predetermined by the arrangement of the displacement element.

In an advantageous implementation of the inventive concept, it is provided that the connection system has at least one sealing device, wherein the at least one sealing device is suitable for sealing the fixing element from the second component and/or the displacement element from the fixing element.

The at least one sealing element can be arranged on the displacement element, partially or completely covering its surface. The at least one sealing element can also be part of the displacement element, in which case the lateral surface of the displacement element can be coated with a suitable sealing and deformable material. Furthermore, a sealing element can be arranged on the expanding section of the fixing element, which enables a sealing effect of the fixing element and in relation to the second component.

The at least one sealing element can be made of a deformable elastomer, for example.

It is advantageously provided according to the invention that the head section has a shank section which is delimited on both sides by two flange elements projecting in the transverse direction over the shank section. It can thus be achieved that the head section of the displacement element can be accommodated by a retainer receptacle of the first component. The retainer mount is a bow-shaped holding element of the first component, wherein when the first component is fixed to the shank section, the shank section is surrounded by the holding element and engages in the retainer mount.

The shaft section can have an outer contour that tapers in the direction of the foot section, as a result of which an advantageous self-centering effect can be achieved when the head section is arranged on the first component or in a retainer receptacle of the first component.

Advantageously, according to the invention, it is optionally provided that the connection system is assembled using a method according to one of claims 1 to 4 and a first component is thereby fixed to a second component.

• 1 eine perspektivische Ansicht eines erfindungsgemäßen Verbindungsystems in einem Vormontagezustand,
• 2 eine Frontansicht des Verbindungssystems aus 1,
• 3 eine perspektivische Ansicht des erfindungsgemäßen Verbindungsystems in einem Montagezustand,
• 4 eine Frontansicht des Verbindungssystems aus 3,
• 5 eine perspektivische Ansicht eines Verlagerungselements,
• 6 eine Frontansicht des Verlagerungselements aus 5,
• 7 eine perspektivische Ansicht eines Festlegungselements, und
• 8 eine Frontansicht des Festlegungselements aus 7.

Further advantageous exemplary embodiments of the method for fixing a first component with a connection system on a second component and of the connection system for connecting a first component with a second component are shown in the following figures. It shows:

• 1 a perspective view of a connection system according to the invention in a pre-assembly state,
• 2 a front view of the connection system 1 ,
• 3 a perspective view of the connection system according to the invention in an assembled state,
• 4 a front view of the connection system 3 ,
• 5 a perspective view of a displacement element,
• 6 a front view of the displacement element 5 ,
• 7 a perspective view of a fixing element, and
• 8th a front view of the fixing element 7 .

In the 1 until 4 the method according to the invention for fixing a first component to a second component is shown with a connection system 1 which is also according to the invention, the first component and the second component not being shown. After the assembly of the connection system 1 according to the invention, a displacement element 2 of the connection system 1 is connected to a first component and a fixing element 3 of the connection system 1 is connected to a second component. The first component is fixed without play on the second component by a spring device 4 arranged on the displacement element 2 , as a result of which the displacement system 2 is pulled onto the fixing element 3 with the aid of the spring device 4 .

1 and 2 show the connection system 1 according to the invention in a perspective view and in a front view in the pre-assembly state. The connection system 1 has a fixing element 3 with an almost rectangular cross-sectional area, which has a fixing recess 7 extending from a top side 5 to a bottom side 6 opposite the top side 5 along a longitudinal direction. A retaining section 8 facing the upper side 5 and a spreading section 9 facing the lower side 6 are arranged on the fixing element 3 along the longitudinal direction of the fixing recess 7 . An elongate displacement element 2 is arranged in the fixing recess 7 and has a cruciform shape in a cross-sectional area running transversely to the longitudinal direction. The shape of the fixing recess 7 of the fixing element 3 is adapted to the shape of the displacement element 2 . The displacement element 2 has at one end of the displacement element 2 a head section 10 and a foot section 11 opposite the head section 10 . Two flange elements 13 which are spaced apart and arranged parallel to one another and project in the transverse direction over a shank section 12 are formed on the head section 10 . The first component can be fixed between the two flange elements 13 . The foot portion 11 has a tapered tip 14 disposed on the foot portion 11 . In the pre-assembly state, the displacement element 2 with the tapering tip 14 is arranged in the fixing recess 7 such that the tip 14 protrudes through the expanding section 9 and beyond the expanding section without the fixing element 3 being deformed in the expanding section 9 . The tip 14 of the displacement element 2 protruding beyond the expansion section in the pre-assembly state can prevent the displacement element 2 from being unintentionally displaced during assembly before the fixing element 3 with the expansion section 9 is arranged in the component recess of the second component and the tip 14 is still there rests against an area on the surface of the component that is adjacent to the component recess.

The fixing element 2 has a retaining device 15 which is formed on the retaining section 8 and which is arranged on the inner surface of the fixing recess 7 . The retaining device 15 has a plurality of latching elements 16 in the form of inwardly projecting beads arranged on opposite sides of the fixing recess 7 .

The spring device 4 formed on the connection system 1 has a spring element 17 which is formed on the displacement element 2 as a leaf spring 18 connected to the displacement element 2 . The leaf spring 18 has a plurality of leaf spring sections, each of which is arranged with a leaf spring base and fixed to the displacement element. In a relaxed and force-free state, the leaf spring sections of the leaf spring 18 would protrude from the leaf spring base in an approximately U-shape. The mutually opposite ends of the respective leaf spring sections are supported in the pre-assembly state on the retaining device 15 and on the fixing element 3 and are deformed against their spring action.

When the displacement element 2 is displaced in the longitudinal direction, the connection system 1 is transferred from the pre-assembly state to the assembled state. The displacement element 2 is guided with the spring element 17 in the longitudinal direction along the latching elements 16 when the force acting on the displacement element 2 is greater than a restraining force of the restraining device 15. An area around the latching elements 16 is designed to be elastic, so that the latching elements 16 Pressure of the displacement element 2 can escape.

In the assembled state, the spring element 17 produces a spring effect which causes a force on the displacement element 2 directed in the direction of the expanding section 9 . Due to the displacement of the displacement element 2, the foot section 11 of the displacement element 2 is inserted further into the expansion section 9, with four expansion elements 19 formed on the fixing element 3 in the expansion section 9 being deflected in the transverse direction and the fixing element 3 with the expansion section 9 in a recess of the second Component sets clamping. The displacement element 2 is pressed in the direction of the expanding section 9 by the spring element 17, which counteracts a loosening of the connection due to vibrations or impacts, and the first component is held on the second component without play. Between the displacement element 2 and the fixing element 3, the connection system 1 has a sealing device 20 for sealing the two elements.

In 3 and 4 the connection system 1 is shown in the assembled state in a perspective view and in a front view.

In the 5 and 6 the displacement element 2 according to the invention is shown in a perspective view and in a front view, the displacement element 2 having the head section 10 and the foot section 11 .

In the 7 and 8th is a perspective view and a front view of the fixing element 3 is shown, the already in connection with the 1 until 4 explained features are visible.

Reference List

1

connection system

2

displacement element

3

determination element

4

spring device

5

Top of the fixing element

6

Bottom of the fixing element

7

fixing recess

8th

retention section

9

spreading section

10

head section

11

foot section

12

shank section

13

flange elements

14

Top

15

restraint device

16

locking elements

17

spring element

18

leaf spring

19

spreading element

20

sealing device

Claims (21)

Method for fixing a first component with a connection system (1) on a second component, the first component being fixed on a displacement element (2) of the connection system (1), a fixing element (3) of the connection system (1) having an expanding section ( 9) is arranged in a component recess of the second component and wherein in an assembly step the displacement element (2) in the fixing element (3) is displaced in a longitudinal direction into the expansion section (9) of the fixing element (2) and thereby expansion elements (19) of the fixing element (3) are deflected or deformed or blocked, so that the fixing element (3) is fixed in the second component, characterized in that the connection system (1) has a spring device (4) connected to the displacement element (2) and having a deformable spring element (17 ) has, wherein the spring element (17) is deformed in a pre-assembly step against its spring action and is supported on the fixing element (3) and on a retaining device (15) formed on a retaining section (8), and that in the assembly step the spring element (17) generates a spring effect which exerts a force directed in the direction of the expanding section (9). the displacement element (2) causes. procedure after claim 1 , characterized in that the displacement of the displacement element (2) is brought about by a force acting on the head section (10), a restraining force of the restraint device (15) being overcome, so that a foot section (11) of the displacement element (2) along the longitudinal direction of the retaining section (8) is shifted into the spreading section (9). procedure after claim 1 or 2 , characterized in that in a pre-assembly step preceding the assembly step, the head section (10) of the displacement element (2) is connected to the first component and the fixing element (3) is connected to the second component with the aid of the expanding section (9). Procedure according to one of Claims 1 until 3 , characterized in that the spring action of the spring element (17) in the assembled state is greater than the forces occurring during intended use between the first and second component, so that the first component is fixed without play on the second component. Connection system (1) for connecting a first component to a second component, the connection system (1) having a displacement element (2) and a fixing element (3), the displacement element (2) having a head section (10) for connecting the displacement element (2 ) with the first component, wherein the displacement element (2) has a foot section (11) opposite the head section (10), the fixing element (3) having a longitudinal direction from an upper side (5) to an opposite underside (6) has a fixing recess (7) extending and penetrating the fixing element (3), the fixing element (3) having a retaining section (8) and an expanding section (9) along the longitudinal direction, the expanding section (9) being set up for the fixing element (3) set in a recess on the second component, wherein the displacement element (2) in a pre-assembly state of the connection system (1) is arranged with the foot section (11) in the retaining section (8) of the fixing element (3), and wherein in an assembled state of the connection system (1) the displacement element (2) in is displaced in the longitudinal direction in such a way that the foot section (11) of the displacement element (2) is arranged in the spreading section (9) and the fixing element (3) is deformed or blocked in the spreading section (9) in a direction transverse to the longitudinal direction, so that at a intended arrangement of the fixing element (3) in the fixing recess (7), the fixing element (3) is fixed in the recess with the aid of the expanding section (9), characterized in that the connection system (1) has a spring device ( 4) with a deformable spring element (17), wherein the spring element (17) is deformed in the pre-assembly state against its spring action and is supported on the fixing element (3) and on a retaining device (15) formed on the retaining section (8), and that in the assembled state, the spring element (17) generates a spring effect, which court in the direction of the expansion section (9). tete force on the displacement element (2) causes. Connection system (1) according to claim 5 , characterized in that the spring element (17) has a degressive spring effect. Connection system (1) according to claim 5 or 6 , characterized in that the spring element (17) of the spring device (4) has at least one leaf spring (19), the at least one leaf spring (19) having a leaf spring base on the displacement element (2) and having opposite ends of the leaf spring (19 ) on the fixing element (3) is supported. Connection system (1) according to claim 5 , characterized in that the retaining device (15) has latching elements (16) running in a transverse direction to the longitudinal direction and spaced apart from one another in the longitudinal direction, against which the spring element (17) can rest and be retained thereon. Connection system (1) according to claim 5 or 8th , characterized in that the fixing element (3) is designed to be elastically deformable in a region around the latching elements (16), so that when the spring element (17) of the displacement element (2) that is in engagement with the latching elements (16) is displaced, preferably the latching elements (16) are deformed and the spring element (17) can be displaced along a latching element (16). Connection system (1) according to one of the preceding claims, characterized in that the displacement element (2) in the circumferential direction is non-rotatably arranged in a fixing recess (7) of the fixing element (3) about the longitudinal direction. Connection system (1) according to one of the preceding claims, characterized in that the displacement element (2) has a cross-sectional shape at least in sections and that the fixing recess (7) of the fixing element (3) has a shape adapted thereto. Connection system (1) according to one of the preceding claims, characterized in that the foot section (11) has a tip (14) which in the pre-assembly state projects into the expanding section (9) without the fixing element (3) in the expanding section (9) to deform or block. Connection system (1) according to claim 12 , characterized in that the tip (14) of the foot section (11) protrudes in the pre-assembly state over the expansion section (9) and thus over the fixing element (3). Connection system (1) according to one of the preceding claims, characterized in that the displacement element has a tapering tip (14). Connection system (1) according to Claim 14 , characterized in that on the tapering tip (14) in the longitudinal direction a plurality of cross-shaped and protruding formations are formed in the transverse direction. Connecting element according to one of the preceding claims, characterized in that the expanding section (9) is elastically deformable. Connection system (1) according to one of the preceding claims, characterized in that the expansion section (9) has at least one expansion element (19) formed in the longitudinal direction on the fixing element (3), the at least one expansion element (19) being replaced by the displacement element (2nd ) is deflectable or deformable in the transverse direction. Connection system (1) according to one of the preceding claims, characterized in that a distance from the top (5) to the bottom (6) of the fixing element (3) is less than a length of the displacement element (2). Connection system (1) according to any one of the preceding claims, characterized characterized in that the connection system (1) has at least one sealing device (20), the at least one sealing device (20) being suitable for the fixing element (3) in relation to the second component and/or the displacement element (2) in relation to the fixing element (3) to seal. Connection system (1) according to one of the preceding claims, characterized in that the head section (10) has a shank section (12) which is delimited on both sides by two flange elements (13) projecting transversely over the shank section (12). Connection system (1) according to one of Claims 5 until 20 , characterized in that the connection system (1) with a method according to one of Claims 1 until 4 is actuated to connect the first component to the second component.

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