WO2008046467A1

WO2008046467A1 - Lockable plug-in coupling

Info

Publication number: WO2008046467A1
Application number: PCT/EP2007/007507
Authority: WO
Inventors: Rainer Süssenbach
Original assignee: Böllhoff Verbindungstechnik GmbH
Priority date: 2006-10-18
Filing date: 2007-08-28
Publication date: 2008-04-24
Also published as: DE202006015982U1

Abstract

The lockable plug-in coupling for connecting two components (2, 62) comprises a coupling element (4, 4') which can be fastened to one of the two components, a coupling bolt (6, 6') which can be fastened to the other component, and an unlocking button (8, 8'). The coupling element (4, 4') and the coupling bolt (6, 6') can be coupled by a latching connection (R, R') which is latched by a predefined relative movement between the coupling element (4, 4') and the coupling bolt (6, 6'), in order to prevent a relative movement in the opposite direction between the coupling element (4, 4') and the coupling bolt (6, 6') and in order to lock the plug-in coupling as a result. The unlocking button (8, 8') can be moved from a neutral position into an unlocking position, in order to release the latching connection (R, R') and to unlock the plug-in coupling as a result.

Description

Lockable plug-in coupling

description

Background of the invention

The present invention relates to a plug-in coupling for connecting two components.

Conventional plug-in couplings, as they are known for example from DE-GM 299 20 379, DE-GM 201 07 949, DE-GM 201 08 408 and DE-GM 20 2005 011 420, consist of a ball pin with a ball and a coupling body with a ball socket. They have vibration-decoupling properties, so that they enable vibration-decoupling compensatory movements between the components to be connected. The closing and releasing the plug-in coupling is effected by simple relative movements between the ball head and ball socket, which is made possible by using elastically deformable material and corresponding dimensioning of the ball socket and the ball head. With these plug-in couplings, the danger of unintentional release can not be prevented with absolute certainty. From DE-GM 20 2004 006 969 a plug-in coupling with a pull-off is known, in which a sleeve-shaped locking ring is slidably mounted on the coupling body between an unlocked position in which he widening the opening of the ball socket for insertion and Aussteck- the ball head allows, and a backup position in which he a

Expansion of the opening of the ball socket for insertion and removal of the ball head prevented. Between the circlip and the coupling body, a latching connection is provided, which is released by an insertion movement of the ball head relative to the ball socket and engaged by a Aussteckbewegung of the ball head relative to the ball socket. However, this mode of operation must be bought with a relatively high design effort.

Summary of the invention

The present invention has for its object to provide a plug-in coupling for connecting two components, which is locked and unlocked with the least possible design effort in a simple manner. This object is achieved by the defined in claim 1 lockable plug-in coupling.

In the inventively designed plug-in coupling of the coupling body and the coupling pin can be coupled by a locking connection which is locked by a predetermined relative movement between the coupling body and coupling pin to prevent an opposite relative movement between the coupling body and coupling pin and thereby lock the plug-in coupling. To unlock the plug-in coupling, an unlocking button is provided, which is adjustable from a neutral position into an unlocking position in which it releases the latching connection in order to allow the opposite relative movement between coupling body and coupling pin. The inventively designed plug-in coupling is thus not locked by an additional component, but rather by acting between the coupling body and coupling pin locking connection, which is locked in a simple manner by a corresponding relative movement between the coupling body and coupling pin. The inventively provided

Unlocking button is only used to release the locking connection by he - manually - from the neutral position in which he has no influence on the locking connection, is moved to its unlocked position in which he releases the locking connection, so that the coupling pin can be removed from the coupling body.

The inventively designed lockable plug-in coupling is characterized by constructive simplicity. The locking connection, which serves as a barrier against unintentional release, requires only a small insertion force to close the plug-in coupling. Nevertheless, the lock provides in the form of locking connection for a high security against unintentional release. The

Releasing the lock is made possible by a simple operation, in particular an axial pressure actuation of the release button.

In a further embodiment of the invention, the coupling body and the unlocking button form a preassemblable component assembly (ZSB part), which can be attached as a unit to one of the components to be connected. The pre-assembly of the ZSB part can for example be done by the manufacturer, so that then the end customer must attach only the ZSB part to the component to be connected.

Further advantageous embodiments of the invention are defined in the dependent claims.

Brief description of the drawings

Two embodiments of the invention will be explained in more detail with reference to the drawings. It shows: 1 shows a perspective axial section through a coupling body of an inventively designed lockable plug-in coupling according to a first exemplary embodiment;

Figures 2, 3 are perspective views of the coupling body in Figure 1 from above or below ..;

Fig. 4 is a perspective view of a coupling pin of the plug-in coupling;

Fig. 5 is a rotated by 90 ° perspective view of the coupling pin in Fig. 4; Fig. 6 is a perspective sectional view of a release button of the plug-in coupling;

Fig. 7 is a side view of the release button in Fig. 6;

8 shows a perspective sectional view of a structural unit from the coupling part of FIGS. 1 to 3 and the unlocking button of FIGS. 6, 7;

FIG. 9 shows an axial section of the assembly of FIG. 8; FIG.

Fig. 10 is a side view of the coupling bolt of Figures 4, 5;

11 shows an axial section of the plug-in coupling in the locked state;

FIG. 12 shows an axial section of the push-in coupling rotated by 90 ° with respect to FIG. 11 in the locked state; FIG.

Fig. 13 is a sectional view corresponding to Figure 11 of the plug-in coupling in the unlocked state.

Fig. 14 is a perspective axial section through the coupling body of the second embodiment; Figures 15, 16 are perspective views of the coupling body in Figure 14 from above and below.

Fig. 17 is a perspective view of the coupling bolt of the second embodiment;

FIG. 18 is a perspective sectional view of the unlock button of the second embodiment; FIG. FIG. 19 shows a perspective view of the unlocking button in FIG. 18 from below; FIG.

FIG. 20 shows a perspective view of the assembly from the coupling body of FIGS. 14 to 16 and the unlocking button of FIGS. 18, 19;

Fig. 21 is an axial section of the assembly in Fig. 20;

Fig. 22 is a side view of the coupling bolt in Fig. 17;

FIG. 23 shows an axial section of the plug-type coupling according to the second exemplary embodiment in the locked state; FIG. FIG. 24 is a sectional view, corresponding to FIG. 23, of the plug-in coupling in the unlocked state;

FIG. 25 shows a section in the direction of the arrows XXV-XXV in FIG. 23.

Detailed Description of the Preferred Embodiments of the Invention

First embodiment of the lockable plug-in coupling

The plug-in coupling shown in Figures 11 to 13 is used for releasably connecting a plate-shaped member 2 with a (not shown) second component. The plug-in coupling consists of three parts, namely a coupling body 4 which can be fastened to the component 2, a coupling pin 6 which can be fastened to the second component, and a release button 8. The coupling body 4 and the unlocking button 8 form a structural unit 9 Pre-assembled (Figures 8, 9), which can be supplied for example by a manufacturer as a component assembly (ZSB) to a customer to be attached by this to the component 2.

The plug-in coupling is in its closed and locked state by the component 2 provided with the coupling body 4 and the component (not shown) provided with the coupling pin 6 along a central axis. RAL axis X of the plug-in coupling relative to each other are moved so that a latching connection R between the coupling pin 6 and the coupling body 4 engages. The locking connection R prevents by positive engagement a plug-in coupling opening opposite relative movement, so that the plug-in coupling is locked. To unlock the plug-in coupling is the

Unlocking button 8, as will be explained in more detail with reference to FIG. 13.

The coupling body 4 is shown in more detail in Figures 1 to 3, the coupling pin 6 in Figures 4, 5 and the release button 8 in Figures 6, 7. Coupling body 4

The coupling body 4 shown in Figures 1 to 3 consists of a radially inner sleeve-shaped wall 10, a radially outer sleeve-shaped wall 12, a conical intermediate wall 14 which connects the wall 10 with the wall 12, and an annular flange 16, the the one axial end of the outer wall 12 is integrally formed. The inner wall 10 and the outer wall 12 are further interconnected by tangentially extending ribs 18 (Figure 3) which, together with the intermediate wall 14, provide vibration isolation between the inner wall 10 and outer wall 12, as will be explained in greater detail.

The inner wall 10 has a frusto-conical inner wall surface, which thus forms a frusto-conical receiving bore 20, and a cylindrical wall outer surface 22, such that the inner wall 10 and the intermediate wall 14 in an axial section (FIG. 1) have an approximately Y-shaped cross section to have. The inner wall 10 is bounded at its two axial ends by radially extending end faces 24 and 26 which cooperate with the coupling pin 6 to axially fix the coupling pin 6, as will be explained in more detail.

The outer wall 12 of the coupling body 4 is composed of Zentrierberei- chen 28 and mounting portions 30 which in the circumferential direction are arranged alternately to each other (Fig. 2). In the illustrated exemplary embodiment, three centering regions 28 and three attachment regions 30 are provided; however, the number could be chosen differently. The centering areas 28 serve to receive and center the coupling body 4 in a receiving bore A of the component 2 (FIGS. 11, 12), while the fastening portions 30 serve to hold the coupling body 4 on the component 2.

In the centering regions 28, the wall outer surface of the outer wall 12 is composed of a short chamfer 32, a cylindrical portion 34, a conical portion 36 and a short cylindrical portion 38, wherein the flange 16 adjoins the cylindrical portion 38. The cylindrical portion 34 has a smaller diameter than the cylindrical portion 38, whose diameter is adapted to the diameter of the receiving bore A of the component 2 for a play-free fit of the coupling body 4 in the receiving bore A.

The flange 16 is provided in its radially outer region with a circumferential projection 40, with which it is elastically supported in the installed state on the component 2.

In the attachment areas 30 of the coupling body 4, the outer wall 12 has a wall outer surface which is at one axial end with the same

Chamfer 32 as the centering regions 28 is provided. From the chamfer 32 from the wall 12 is formed by conically extending retaining segments 42, the outer wall surfaces - optionally via short cylindrical portions 34 - are connected to the chamfers 32. The retaining segments 42 are connected at their lateral edges to the centering regions 28, specifically via wall sections which have a significantly reduced wall thickness due to axially running flutes 44. At their the flange 16 adjacent axial ends of the retaining segments 42 are exposed. This is achieved in that the flange 16 adjacent to the retaining segments 42 is provided with apertures 46, so that the lower end faces 48 of the retaining segments 42 are provided by the Flange 16 and thus separated from the remaining region of the coupling body 4.

The outer wall 12 of the coupling body 4 has a wall inner surface, which consists of a chamfer 50 and a cylindrical portion 52, to which the intermediate wall 14 is adjacent. The intermediate wall 14 is provided in the region of the fastening regions 30 and thus in the region of the retaining segments 42 with axially extending openings 54. As can be seen in particular from FIG. 3, the tangentially extending ribs 18 are arranged in the centering regions 28 and thus not in the attachment regions 30. Thus, since the retaining segments 42 are separated from the rest of the coupling body 4 both at their axial ends (end surfaces 48) and at their inner wall surfaces and are also connected at their lateral edges only with thinned wall portions to the centering regions 28, the retaining segments are elastically deformable to be attached to the component 2, as will be explained in more detail.

The openings 54 provided in the attachment areas 30 of the intermediate wall 14 offer the possibility of providing the retaining segments 42 with short radially extending latching shoulders 56 which connect the cylindrical section 52 of the inner wall surface of the outer wall 12 with the conically extending wall inner surfaces of the retaining segments 42.

Coupling pin 6

The coupling pin 6 illustrated in FIGS. 4 and 5 consists in the exemplary embodiment shown of two parts 60 and 62, of which the part

60 represents the actual coupling pin and the part 62 is a threaded bolt for attachment to the (not shown) second component. However, the coupling pin 6 could also be integrally formed and connected in other ways with the second component. In the illustrated embodiment, the part 62 of the coupling pin 6 has an approximately disc-shaped body portion 66 which is provided with a driving feature in the form of a hexagon. Again, another driving feature could be provided. The body portion 66 merges at its upper end side in an annular portion 68 which at its

Top is provided with an annular bearing surface 70.

On the annular portion 68, two axially extending latching hooks 72 are formed, which alternate in the circumferential direction with two bolt segments 74. The number of latching hooks 72 and bolt segments 74 could also be chosen differently. The locking hooks 72 serve to produce the latching connection R (FIG. 11), while the bolt segments 74 serve for centering and securing the coupling bolt 6 on the coupling body 4 (FIG. 12), as will be explained in more detail.

Each of the latching hooks 72 is composed of an axially extending latching arm 76 and a latching portion 78 integrally formed thereon. The resting section

78 has a part frustoconical inclined surface 80 and a radially extending locking surface 82 which are interconnected by a short part-cylindrical outer surface. Since the latching hooks 72 are integrally formed on only one axial end on the remaining coupling pin, they are radially resiliently deformable in order to be able to exert their latching function.

The bolt segments 74 of the locking bolt 6 have part frustoconical outer surfaces 84, which is adapted to the frusto-conical Aufhahmebohrung 20 of the coupling body 4. More precisely, the part-truncated cone-shaped outer surfaces 84 of the bolt segments 74 are slightly oversized relative to the truncated wall surface of the receiving bore 20 of the coupling body 4 in order to ensure a backlash-free seating of the coupling bolt 6 in the coupling body 4.

As particularly shown by a comparison of FIGS. 11 and 12, the bolt segments 74 are comparatively solid and stiff compared to the latching hooks 72, their axial length being approximately equal to the length of the sections 76 of FIGS Latching hook 72 (ie without the latching portions 78) is limited. As a result, the stability of the backlash-free seat of the coupling pin 6 is reinforced in the coupling body 4.

Release button 8

The unlocking button 8 shown in Figures 6 and 7 has a circular probe 84 which is provided on its upper side with a sensing surface 86 for manually actuating the unlocking button. The probe 84 merges on its underside in an annular body portion 90, wherein between the probe 84 and the body portion 90 serving as a bearing surface radially extending annular shoulder 88 is provided. The body portion 90 has a central blind bore 92, whose outer edge forms a rounded actuating edge 94, the purpose of which will be explained in more detail.

The body portion 90 is provided with circumferentially distributed recesses 96 for material savings, thereby forming axially extending ribs. The body portion 90 merges at its axially lower end into three guide segments 98 formed as relatively thin wall portions. The guide segments 98 have such a width in the circumferential direction that they fit into the apertures 54 in the intermediate wall 14 of the coupling body 4. The guide segments 98 can therefore be inserted into the apertures 54 so that the inner surfaces of the guide segments 98 are guided on the cylindrical wall outer surface 22 and the outer surfaces of the guide segments 98 on the cylindrical portion 52 of the inner wall surface of the coupling body 4. The guide segments 98 are provided on their outer sides with axial locking projections 100 which cooperate with the radial latching shoulders 56 of the coupling body 4 to serve as a captive for the release button 8. Material of the individual parts of the plug-in coupling

The individual parts of the plug-in coupling are made of plastic, apart from the threaded part 62 of the coupling pin 6, which may consist of steel or another metallic material.

The coupling pin 6 is suitably made of a plastic with good spring properties and very high impact strength with high mechanical strength. The plastic can be reinforced - for example by glass fibers - to increase the mechanical strength. The coupling body 4 consists for example of a thermoplastic

Polyester-based elastomer. The polyester-based elastomer is, for example, a polybutylene terephthalate (PBT) or polyethylene terephthalate (PET). However, the coupling body 4 may also be made of a crosslinked elastomer, rubber or rubber. The unlocking button 8 can be made of the same plastic or a similar plastic as the coupling pin 6.

Pre-assembly of the unit 9

As already mentioned and shown in FIG. 8, the coupling body 4 and the unlocking button 8 can be preassembled into a unit 9. For this purpose, the unlocking button 8 is assembled with the coupling body 4 in such a way that the guide sections 98 of the unlocking button 8 are introduced into the graduations 54 of the coupling body 4 which are matched in terms of dimensions. In this case, the latching projections 100 can engage behind the latching shoulders 56 of the coupling body 4 due to the elastic deformability of the guide segments 98. The engagement is favored by flat rising chamfers 102 of the locking projections 100.

The guide segments 98 are on the one hand on the cylindrical Wandau- ßenfläche 22 of the radially inner wall 10 and on the other hand on the cylindrical see section 52 of the inner wall surface of the radially outer wall 12 axially guided. A limitation of the axial movement of the release button 8 relative to the coupling body 4 takes place in one direction by striking the locking projection 100 on the latching shoulder 56 and in the other direction by striking the shoulder 88 on the upper end face 49 of the coupling body

4. The unlocking button 8 is thus held captive on the coupling body 4, so that unlock button and coupling body form the unit 9 shown in Figure 8, which can be transported as a unit and "handled".

Assembly of the assembly 9 on the component. 2

The coupling body 4 with the release button 8, which were pre-assembled in the manner described to the assembly 9, can now be attached to the component 2, as shown in Fig. 9. For this purpose, the assembly 9 is inserted with the release button 8 ahead in the receiving bore A of the component 2 (see Fig. 9). Here, the coupling body 4 is first guided over the chamfer 32 and the cylindrical portion 34 of the radially outer wall 12 of the coupling body 4 in the Aufhahrnebohrung A of the component 2. As the axially directed insertion force increases, the retaining segments 42 of the coupling body 4 are deformed radially inwards, which is made possible by the retaining segments 42 being connected to the remaining coupling body 4 only at their lateral longitudinal edges, as explained above. When the flange 16 abuts against the component 2 with the annular projection 40, the retaining segments 42 spring back radially outward into their initial position, which is made possible by the elasticity of the material used and the described connection of the retaining segments 42 to the remaining coupling body 4 ,

The coupling body 4 together with the release button 8 is now held on the component 2 in that the component 2 between the ringför- migen projection 40 of the annular flange 16 and the end faces 48 of the retaining segments 42 is clamped. In this way, a play-free seat of the coupling body 4 is secured to the component 2 in the axial direction, while a backlash-free seat in the radial direction by a slight excess of the zy- lindrischen section 38 of the radially outer wall 12 relative to the receiving bore A of the component 2 is achieved.

It should be noted at this point, however, that the coupling body 4 could also be fastened to the component 2 in a different manner. Corresponding types of fastening similar coupling body to plate-shaped components are known in the art, as is apparent, for example, from the publications mentioned above.

Close and open the plug-in coupling

In the illustrated embodiment, the coupling pin 6 is attached to the second component (not shown) to be connected to the first component 2 in that the threaded portion 62 is screwed into a corresponding threaded hole (not shown) of the second component. However, the coupling bolt can also be attached to the second component in any other way.

To close the plug-in coupling and connect the component 2 to the other component, it is only necessary to introduce the coupling pin 6 by an axial relative movement between the two components to be connected in the coupling body 4 until the latching connection R engages. This state is shown in FIGS. 11, 12.

When inserting the coupling pin 6 in the coupling body 4, the outer inclined surfaces 80 of the latching hooks 72 slide along the frusto-conical wall surface of the frusto-conical receiving bore 20 of the coupling body 4, whereby the latching hooks 72 are resiliently deformed radially inward (FIG. 11). At the same time the bolt segments 74 come with their part frustoconical outer surfaces 84 in the frusto-conical receiving bore 20 of the coupling body 4 a (Fig. 12).

When the annular abutment surface 70 of the coupling pin 6 strikes against the end face 26 of the radially inner wall 12 of the coupling body 4 and the latching hooks 72 are spring-back radially outwards into their starting position, the locked state is achieved. The radial latching shoulders 82 of the latching sections 80 of the latching hooks 72 are now on the serving as latching surfaces annular end face 24 of the radially inner wall 10 of the coupling body 4, so that the locking connection R by Ausschlussbewe- movement of the coupling pin 6 relative to the coupling body 4 prevents.

At the same time the stop connection between the contact surface 70 of the coupling pin 6 and the end face 26 of the radially inner wall 10 of the coupling body 4 prevents further axial insertion movement of the coupling pin 6. The coupling pin 6 is thus axially fixed in the coupling body 4, so that the plug-in coupling in the closed state is secured against unintentional release by acting as a lock detent connection R. At the same time, the pin segments 74 of the coupling pin 6 rest against the wall surface of the frusto-conical receiving bore 20 of the coupling body 4, as a result of which the coupling pin 6 in the coupling body 4 is radially fixed.

Both the axial and radial fixation of the locking bolt 6 in the coupling body 4 via a play-free seat. This is achieved by an appropriate dimensioning of the elements involved and the elasticity of the materials used. Thus, the relatively stiff executed bolt segments 74 are slightly oversized relative to the truncated cone-shaped receiving bore 20 in order to achieve a corresponding fit. In the axial direction is a play-free seat by the simultaneous contact between the locking shoulders 82 of the latching hook 72 and the end face 24 of the Kupplungsungskör- pers 4 on the one hand and the system between the annular contact surface 70th of the coupling pin 6 and the end face 26 of the coupling body 4 on the other hand achieved. A certain compensation of manufacturing tolerances of the elements involved is made possible in both cases by the suspension properties of the material and the geometry of the elements involved (eg latching hooks).

In Figures 11, 12, the plug-in coupling is locked. To unlock the plug-in coupling, only the release button 8 must be pressed by axial pressure on its top 86 down (Fig. 13). In this process, the annular actuating edge 94 of the unlocking button 8 slides along the inclined surfaces 80 of the latching hooks 72, whereby the

Latch hooks 72 are deformed radially inwardly. The unlocked state in which the latching connection R is released again is achieved when the latching hooks 72 have been deformed radially inward to the extent that they are completely radially within the end face 24 of the coupling body 4, as can be seen in Fig. 13 , In this state, the locking portions 78 of the locking hooks

72 received by the central blind bore 92 of the release button 8, wherein the latching hooks 72 are held by engagement with the bore wall of the blind bore 92 in its unlocked state. The diameter of the blind bore 92 in the area in which the latching sections 78 bear against the bore wall is dimensioned such that it is smaller than or at most equal to the inner diameter of a cylindrical section of the receiving bore 20 in the area of the end face 24.

The coupling pin 6 can now be removed by a simple axially directed extraction movement of the coupling body 4. Here, the latching hooks 72 spring back into their starting position. The plug-in coupling is released, and the two components are separated again.

The partially frusto-conical inclined surfaces 80 of the latching hooks 72 interact with both the locking and unlocking of the plug-in coupling with the annular actuating edge 94 of the unlocking button 8: If the unlocking button 8 assumes an axially inwardly shifted starting position relative to the coupling body 4 before closing the plug-in coupling, it must be taken when locking the plug-in coupling of the coupling pin 6 axially outwards into its end position, in which the locking projections 100 of the guide segments 98 at engage the locking shoulders 56 of the retaining segments 42. This is achieved in that the oblique surfaces 80 of the latching hooks 72 act on the actuating edge 94 of the release button 8 so that a non-positive connection is formed, via which the coupling pin 6 can move the release button 8 axially. For this purpose, the angle α (Fig. 10), the inclined surfaces 80 of the

Including latching hooks 72 with the axis X, greater than the self-locking angle, which results from the combination of the materials used by the coupling pin and the release button. In the illustrated embodiment, both elements are made of plastic. The friction coefficient of this material pairing is then approximately 0.4. From this, the angle α of the self-locking can be derived: INV tg 0.4 = 22 °. In order to perform the described function, therefore, the angle α must be greater than 22 °. In the illustrated embodiment, it is in the order of 25 °.

When unlocking the plug-in coupling, the actuating edge 94 of the unlocking button 8 cooperates with the inclined surfaces 80 of the latching hooks 72 in such a way that the actuating edge 94 deforms the latching hooks 92 radially inwardly. This should be done with the lowest possible axial force. For this reason, the angle α should not be too large. Preferably, it should be less than 40 °. For the above reasons, the angle α, which include the inclined surfaces 80 of the latching hooks 72 with the axis X, suitably selected between 25 ° and 40 °. Second embodiment of the plug-in coupling

In the illustrated and described first exemplary embodiment, the spring-trained latching hooks 72 are provided on the coupling pin 6, while cooperating with the latching hooks non-deformable latching surface 24 is provided on the coupling body 4. In principle, this arrangement can also be reversed.

Thus, the elastically deformable latching hooks on the coupling body and the undeformable locking surface can be provided on the coupling pin. A corresponding embodiment is particularly recommended for very small dimensions of the plug-in coupling, if the locking hooks of the coupling bolt can not be made resilient due to the small dimensions of strength reasons. Another advantage of this embodiment is a certain structural simplification of the plug-in coupling, in particular the

Coupling bolt.

The basic structure of the plug-in coupling according to the second embodiment corresponds to that of the first embodiment, except for deviations caused by the inversion. Therefore, in the second embodiment, the same reference numerals provided with a 'are used, provided that the components of the two embodiments correspond to each other.

The plug-in coupling according to the second embodiment also consists of a coupling body 4 ', which is fastened to the component 2, a coupling pin 6', which is attachable to the second component, and a

Unlocking button 8 '. The coupling body 4 'and the release button 8' are preassembled to form a structural unit 9 '(FIGS. 20, 21).

The opening and closing of the plug-in coupling takes place in the same way as in the first embodiment. Incidentally, in terms of structure and operation of the second embodiment, the description of the first Embodiment be used, unless otherwise stated below.

Coupling body 4 '

The coupling body 4 'shown in Figures 14 to 16 consists of a radially inner wall 10', which forms the elastically deformable latching hook in this embodiment and therefore significantly different from the radially inner wall 10 of the first exemplary embodiment, a radially outer sleeve-shaped wall 12 'and an annular flange 16' which is integrally formed on the one axial end of the outer wall 12 '.

The radially inner wall 10 'is in this embodiment of three circumferentially spaced segment-like wall portions 110, which form the elastically deformable latching hooks 72'. The segment-like wall sections 110 are connected to one another by connecting webs 112, which are integrally formed on the side edges of the wall sections 110 and have a V-shaped cross section. The connecting webs 112 have a wall thickness that is significantly reduced in relation to the wall sections 110 and clamp the wall sections 110 forming the latching hooks 72 'into the starting position shown in FIGS. 14 to 16, as will be explained in more detail below.

The wall sections 110 are connected on the one hand via tangentially extending ribs 18 'and on the other hand via joint sections 113 with the radially outer wall 12'. The ribs 18 'are comparable to the ribs 18 of the first exemplary embodiment. The articulated sections 113 are formed by cross-section-reduced intermediate sections, which are formed on the one hand on the axially lower ends of the wall sections 110 and on the other hand on the axially lower end of the radially outer wall 12 '. The ribs 18 'in conjunction with the hinge portions 113 provide the desired vibration decoupling between the inner wall 10' and outer wall 12 '. In addition, the hinge portions 113 in conjunction with the ribs 18 'allow the elastic deformability of the locking hooks 72 'serving as wall sections 110, as will be explained in more detail.

The segment-like wall sections 110 are provided in their lower region with partial frustoconical wall inner surfaces 114 which complement each other to form a partial frustum-shaped "receiving bore" comparable to the receiving bore 20. The partial frustoconical wall inner surfaces 114 go to their axially upper and lower ends (in FIG These areas of the wall sections 110 thus form latching sections 76 'which together with the coupling bolt 6' form the latching connection R '(FIG. 23), as will be explained in more detail below.

The segment-like wall sections 110 are provided in their region above the abutment surface 24 'each with a radially inner, substantially axially extending contact surface 116, which consists of a part-cylindrical section 117, a part frustum-shaped portion 118 and a part-cylindrical portion 119. The radially outer wall surfaces of the wall portions 110 are formed continuously and approximately part-cylindrical.

The radially outer wall 12 'of the coupling body 4' is made up of centering regions 28 'and fastening regions 30' which, as in the first embodiment, are joined together

Embodiment for receiving and centering the coupling body 4 'in the receiving bore A of the component 2 or for holding the coupling body 4' on the component 2 are used.

In the centering regions 28 ', the wall outer surface of the outer wall 12' is composed of a short chamfer 32 ', a cylindrical portion 34' which is significantly longer than the first embodiment, a conical portion 36 'and a short cylindrical portion 38' together. The short cylindrical section 38 'is adapted in terms of its diameter to the receiving bore A of the component 2 for a play-free fit of the coupling body 4' in the receiving bore A. The flange 16 'is provided with a circumferential projection 40' as in the first embodiment.

In the attachment portions 30 'of the coupling body 4', the outer wall 12 'has a wall outer surface which is provided at one axial end with the same chamfer 32' as the centering portions 28 '. From the chamfer 32 ', the wall 12' of partially conically extending retaining segments 42 'is formed. The retaining segments 42 'are connected at their lateral edges to the centering regions 28', specifically via wall sections which have a significantly reduced wall thickness due to axially running grooves 44 '. At their the flange 16 'adjacent axial ends of the retaining segments 42' are exposed. This is achieved in that the flange 16 'is adjacent to the retaining segments 42' provided with openings 46 ', so that the lower end faces of the retaining segments 42' from the flange 16 'and thus from the remaining region of the coupling body 4' are separated. The outer wall 12 'of the coupling body 4' has a wall inner surface which is composed of a cylindrical portion 52 'and in the centering regions 28', ie outside of the apertures 46 ', from part frustoconical portions 53'. The cylindrical portion 52 'of the inner wall surface has a substantially greater axial length than in the first embodiment.

As in the first embodiment, the retaining segments 42 are provided on their inner sides with radially extending locking shoulders 56 'which connects the cylindrical portion 52' of the inner wall surface of the outer wall 12 'with the conically extending inner wall surfaces of the retaining segments 42'.

Coupling pin 6 '

The coupling pin 6 'shown in Figure 17 is, as already mentioned, not provided with elastically deformable latching hooks; rather, it is formed as a massive part. As in the first exemplary embodiment, the coupling pin 6 'consists of two parts 60' and 62 ', of which the part 60' represents the actual coupling pin and the part 62 'is a threaded bolt for attachment to the second component (not shown). In the illustrated embodiment, the part 62 'as the part 62 (see Figures 11 to 13) is a solid threaded body with external thread; However, it can also be designed as a sleeve-shaped threaded body with internal thread. As has already been explained in connection with the first embodiment, the coupling pin can also be formed in one piece and connected in some other way with the second component. For example, the coupling bolt can also be fastened to the second component by means of clips, gluing or the like.

As in the first exemplary embodiment, the part 62 'of the coupling pin 6' has an approximately disk-shaped body portion 66 ', which is provided with a hexagon. The body portion 66 'merges at its upper end side into a cylindrical portion 68', which is provided on its upper side with an annular bearing surface 70 'and has a slightly greater axial length than in the first embodiment.

The part 60 'of the coupling pin 6' consists of an intermediate section 121 and a bolt head 123. The intermediate section 121 has a truncated cone surface 120, which tapers upwards from the contact surface 70 and merges into a short cylindrical surface 122.

The cylindrical surface 122 is adjoined by the bolt head 123, which has a cylindrical surface 124 of larger diameter and a frustoconical outer surface 126. Between the cylindrical surfaces 122 and 124, a radially extending locking surface 82 'is provided in the form of a shoulder, which forms with the end faces 24' of the segment-like wall sections 1 10 of the coupling body 4 'the locking connection R', as will be explained in more detail. Release button 8 '

The unlocking button 8 'shown in FIGS. 18 and 19 has, as in the first embodiment, a circular probe head 84' which is provided on its upper side with a sensing surface 86 'for manually actuating the unlocking button.

In contrast to the first embodiment, the trained as a bottom wall 129 probe 84 'is provided with radially inner annular, spaced apart, substantially axially extending actuating portions 128 which are formed with their upper ends on the bottom wall 129 so that their free Ends are radially deflectable, as will be explained in more detail. The bottom wall 129 of the probe 84 'is formed comparatively thin-walled and has a - seen from above - concave shape to facilitate the Auslenkbewegungen the actuating portions 128. The actuating portions 128 have on their inner sides in each case a longer part frustoconical inner surface 130 and a shorter part frustum-shaped inner surface 132, wherein the inner surfaces 130 and 132 with respect to the central axis X are different degrees inclined to form an actuating edge 133. In the illustrated embodiment, three operating sections

128 provided; However, the number can also be chosen differently.

On the radially outer circumference of the probe 84 'are three annularly arranged, axially extending guide segments 98' integrally formed, which are provided at their lower ends with radially outwardly projecting locking projections 100 ', which cooperate with the latching shoulders 56' of the coupling body 4 'to Captive for the release button 8 'to serve. The guide segments 98 'are formed so that their outer surfaces are guided on the cylindrical portion 52' of the inner wall surface of the coupling body 4 'when the unlocking button 8' is mounted in the coupling body 4 '. On the radially outer sides of the latching projections 100 ', chamfers 102' are provided. see that facilitate the installation of the release button 8 'in the coupling body 4'.

Material of the individual parts of the plug-in coupling

The items of the plug-in coupling are made of plastic, apart from the threaded portion 62 'of the coupling pin 6', which may consist of steel or other metallic material.

The coupling body 4 'is made, for example, of a thermoplastic elastomer based on polyester. The polyester-based elastomer is, for example, a polybutylene terephthalate (PBT) or polyethylene terephthalate (PET). However, the coupling body 4 'may also be made of a crosslinked elastomer, rubber or rubber.

The part 60 'of the coupling pin 6' expediently consists of a plastic of high mechanical strength, in particular a glass fiber reinforced plastic. If the part 62 'of the coupling pin 6' consists of a metallic material, then the metallic portion can be formed as a core, which is overmoulded with the plastic of the remaining coupling pin, as can be seen in FIGS. 11 to 13. The unlocking button 8 'is suitably made of a plastic with good spring properties and very high impact strength with high mechanical strength. It can be made of the same material as the coupling body 4 '.

Pre-assembly of the unit 9 '

The pre-assembly of the structural unit 9 '(FIG. 21) takes place in principle in the same way as in the first exemplary embodiment. It should be noted, however, that the unlocking button 8 'inserted into the coupling body 4' so can be that it is completely absorbed by the coupling body 4 ', see Figures 21 and 23, 24th

In short, for the purpose of pre-assembly, the unlocking button 8 'with the locking projections 100' is inserted in advance into the coupling body 4 'from above until the locking projections 100' engage behind the locking shoulders 56 'of the coupling body 4'. When inserting the unlocking button 8 'in the coupling body 4' slide the guide portions 98 'on the inner wall surface of the radially outer wall 12' of the coupling body 4 along '. A limitation of the axial movement of the release button 8 'relative to the coupling body 4' takes place in the outward movement by striking the

Detent projection 100 'on the latching shoulder 56'. In this position (FIG. 21), the actuation sections 128 are in the region of their lower ends against the partially cylindrical sections 119 of the abutment surfaces 116 of the segment-like wall sections 110 of the coupling body 4 '. Another axial movement of the unlocking button 8 'running in the insertion direction is made more difficult by the partially frustoconical sections 118 of the abutment surfaces 116, which adjoin the partially cylindrical sections 119 of the abutment surfaces 116.

As in the first embodiment, the unlocking button 8 'is thus held captive on the coupling body 4, so that the assembly formed by them 9' can be transported as a unit and "handled".

Montafie the assembly 9 'on the component. 2

The assembly of the assembly 9 'on the component 2 takes place exactly in the same manner as in the first embodiment, so that reference can be made to the corresponding description of this assembly process. The assembled state is shown in FIG. 21. Close and open the plug-in coupling

As in the first embodiment, to close the plug-in coupling is only necessary to introduce the coupling pin 6 'by an axial relative movement between the two components to be connected in the coupling body 4' until the latching connection R 'engages. This state is shown in FIGS. 23 and 25.

When inserting the coupling pin 6 'in the coupling body 4', the frusto-conical outer surface 126 of the bolt head 123 of the coupling pin 6 'slides on the teilkegelstumpfformigen inner surfaces 114 of the

Latch hook 72 'forming wall sections 110 of the coupling body 4 along. As a result, the wall portions 110 are pivoted radially outward, which is made possible by the hinge portions 113. Since the ribs 18 'extend essentially tangentially to the wall sections 110 and the connecting webs 112 have a V-shaped cross section, they do not hinder the deflection movements of the wall sections 110 significantly.

When the annular abutment surface 70 'of the coupling pin 6' strikes against the abutment surfaces 26 'of the wall sections 110, the coupling pin 6' has reached a position in which the wall sections 110 forming the latching hooks 72 can spring back into their starting position. This return movement is achieved in particular by the V-shaped connecting webs 112, which bias the wall sections 110 into their initial position. When the wall portions 110 have moved back to their original position, the locking state shown in FIG. 23 is reached. In this state, the radial latching shoulder 82 'of the bolt head 123 is located on the stop surfaces 24' of the latching portions 76 'of the coupling body 12', so that the locking connection R 'by positive locking a pull-out movement of the coupling pin 6' relative to the coupling body 4 'prevented. At the same time, the stop connection between the contact surface 70 'of the coupling bolt 6' and the end faces 26 'of the wall sections 110 of the coupling prevents Body 4 'another axial insertion movement of the coupling pin 6'.

The coupling pin 6 'is thus axially fixed in the coupling body 4', so that the plug-in coupling in the locked state is secured against unintentional loosening by the latching connection R 'acting as a catch. At the same time, the frusto-conical outer surface 120 of the intermediate portion 121 of the coupling pin 6 'abuts the part-truncated cone-shaped inner surfaces 114 of the wall portions 110 of the coupling body 4', whereby the coupling pin 6 'is radially fixed in the coupling body 4'. As in the first exemplary embodiment, the axial and radial fixation of the coupling pin 6 'takes place in the coupling body 4' via a play-free seat, which is also achieved by a corresponding dimensioning of the elements involved and the elasticity of the materials used. As can be seen in FIG. 23, in the locked state, the actuation sections 128 of the unlocking button 8 'engage with their free ends

Gaps between the bolt head 123 of the coupling pin 6 'and the free ends of the segment-like wall portions 110 of the coupling body 4'. In this case, the chamfers 132 of the actuating sections 128 rest against the wedgelust-shaped outer surface 126 of the coupling body 6 ', while the outer surfaces of the actuating sections 128 abut in their lower region against the partially cylindrical sections 119 of the contact surfaces 116 of the wall sections 110.

To unlock the plug-in coupling, as in the first exemplary embodiment, only the unlocking button 8 'must be pressed axially downwards. In this process, the chamfers 132 of the operating portions 128 of the

Unlocking button 8 'on the frustoconical outer surface 126 of the coupling pin 6' along. As a result, the actuating portions 128 are deflected radially outward, which is favored by the described shape of the bottom wall 129 of the release button 8 '. As a result of their deflection movement, the actuating sections 128 pivot as latching hooks 72 'serving wall portions 128 radially outward. In this case, the actuating portions 128 slide with their lower ends along the portions 119, 118, 117 of the contact surfaces 116 of the wall sections 110 until the wall sections 110 have reached their unlocking position (FIG. 24) in which the latching connection R 'is released. The coupling pin 6 'can now be axially out of the

Coupling body 4 'are deducted. The actuation sections 128 of the unlocking button 8 'in this case spring back into their initial position, so that the segment-like wall sections 110 can be moved back from the connecting webs 112 into their starting position. While the actuating portions 128 of the unlocking button 8 'slide along the frusto-conical outer surface 126 of the coupling pin 6', they exert an axially downward force on the coupling pin 6 '. Therefore, when the time is reached in which the bolt head 123 release the segment-like wall portions 110 of the coupling body 4 ', the actuating portions 128 push the coupling pin 6' downwards, so that the pull-out movement of the coupling pin 6 'is triggered to a certain extent automatically.

This effect is achieved by adhesion between the actuating edges 133 of the actuating portions 128 and the frusto-conical outer surface 126 of the bolt head 123. For this purpose, the cone angle α 'between the frusto-conical outer surface 124 and the central axis X (see Figures 17, 22) is greater than the self-locking angle resulting from the pairing of the coupling pin and unlock button materials used. If both elements are made of plastic as in the illustrated embodiment, the friction coefficient of this material pairing is approximately 0.4.

This results in a self-locking angle of about 22 °. In order to perform the described function, therefore, the angle α must be greater than 22 °.

On the other hand, on the other hand, the friction between the actuating portions 128 and the frusto-conical outer surface 126 during unlocking. gangs and thus to be exercised on the release button 8 'unlocking force not to be too large, the angle α should not be too large. He should be less than 40 °. Preferably, the angle α is in the order of 25 °, as in the first embodiment.

Since the angle α is greater than the self-locking angle, it is also ensured that the coupling pin 6 'in the locking process the unlocking button 8' entrains in its upper end position shown in FIG. 23, when the release button 8 'in the unlocking in his in Fig. 24 has remained stuck lower position shown.

Claims

Lockable plug-in patent claims

A lockable plug-in coupling for connecting a first component to a second component, comprising a coupling body (4; 4 ') which can be fastened to the first component (2), a coupling bolt (6; 6') which can be fastened to the second component wherein the coupling body (4, 4 ') and the coupling pin (6; 6') can be coupled by a latching connection (R; and to prevent the coupling pin and thereby to lock the plug-in coupling, and a release button (8; 8 ') which is adjustable from a neutral position to an unlocked position to release the latching connection (R; R') and thereby unlock the plug-in coupling.

2. Plug-in coupling according to claim 1, characterized in that the predetermined and opposite relative movement between the coupling body

(4, 4 ') and the coupling pin (6, 6') extends in a straight line along a central axis (X) of the plug-in coupling.

3. Plug-in coupling according to claim 2, characterized in that the latching connection (R 'R') at least two offset in the circumferential direction latching hooks (72, 72 '), each with a radially extending latching shoulder (82, 24'), which for closing the Locking connection with a radially extending locking surface (24, 82 ') cooperates.

4. Plug-in coupling according to claim 3, characterized in that the latching hooks (72, 72 ') arranged axially extending and radially resiliently deformable are, wherein they are provided with the latching shoulders (82, 24 ') having locking portions (78, 78').

5. Plug-in coupling according to claim 4, characterized in that the radially resiliently deformable latching hooks (72) on the coupling pin (6) and the latching surface (24) on the coupling body (4) are provided.

6. Plug-in coupling according to one of claims 3 to 5, characterized in that the coupling body (4) has a radially inner sleeve-shaped wall (10) and a radially outer sleeve-shaped wall (12) connected by a conically extending intermediate wall (14) are.

7. Plug-in coupling according to claim 6, characterized in that the radially inner sleeve-shaped wall (10) of the coupling body (4) has a truncated conical Aufhahmebohrung (20), and that the coupling pin (6) at least two in the circumferential direction to the latching hooks (72 ) has staggered bolt segments (74) which on the frusto-conical receiving bore (20) adapted teilkegelstumpfförmige outer sides (84) to fix the coupling pin (6) with respect to the coupling body (4) radially with closed latching connection (R).

8. Plug-in coupling according to claim 7, characterized in that the radially inner sleeve-shaped wall (10) of the coupling body (4) axially entgegenge- directed end faces (24, 26), of which one end face (24) with the latching hooks (72) and the other end face (26) with a circumferential stop surface (70) of the coupling pin (6) cooperates to axially fix the coupling pin (6) with respect to the coupling body (4) when the locking connection (R).

9. Plug-in coupling according to claims 5 and 8, characterized in that the latching portions (78) of the latching hooks (72) radially outer inclined surfaces (80), which upon insertion of the coupling bolt (6) in the coupling body (4) with the frusto-conical Aufhahmebohrung (20) of the coupling body (4) cooperate to ten the latching connection (R).

10. Plug-in coupling according to claim 9, characterized in that the unlocking button (8) has a probe head (84) with an inner annular actuating edge (94) which in an unlocking position of the release button (8) in the unlocked position with the inclined surfaces (80) Detent hook (72) cooperates to release the latching connection (R).

11. Plug-in coupling according to claim 10, characterized in that the angle (α), include the inclined surfaces (80) of the latching hooks (72) with the central axis (X) of the plug-in coupling, greater than the self-locking angle, resulting from the material pairing of coupling body (4) and unlocking button (8) results.

12. Plug-in coupling according to claim 10 or 11, characterized in that the actuating edge (94) of the unlocking button (8) from the outer edge of a central blind bore (92) of the unlocking button (8) is formed, the closed latching connection (R) the latching sections ( 78) of the latching hook (72) receives.

13. Plug-in coupling according to claim 4, characterized in that the radially resiliently deformable latching hooks (72 ') on the coupling body (4') and the latching surface (82 ') on the coupling pin (6') are provided.

14. Plug-in coupling according to claim 13, characterized in that the coupling body (4 ') has a radially outer sleeve-shaped wall (12'), and the latching hooks (72 ') of radially inner segment-like wall portions (110) are formed, with the radially outer wall (12 ') by joint portions (113) are connected.

15. Plug-in coupling according to claim 14, characterized in that the latching hooks (72 ') forming radially inner wall sections (110) of the coupling body (4') are interconnected by V-shaped connecting webs (112) which the latching hooks (72 ') bias to a starting position.

16. Plug-in coupling according to claim 15, characterized in that the latching hooks (72 ') forming radially inner wall sections (110) of the coupling body (4') have part frustoconical inner surfaces (114) and the Coupling pin (6 ') has an intermediate portion (121) with a frusto-conical outer surface (120), which are adapted to the teilkgelstumpffÖrmigen inner surfaces (114) of the coupling body (4') and with closed latching connection (R ') against this play, to radially fix the coupling pin (6 ') with respect to the coupling body (4').

17. Plug-in coupling according to claim 16, characterized in that the latching hooks (72 ') forming radially inner wall sections (110) of the coupling body (4') axially oppositely directed end faces (24 ', 26'), which with oppositely directed circumferential stop surfaces ( 70 ', 82') of the coupling pin (6 ') cooperate in order to axially fix the coupling pin (6') with respect to the coupling body (4 ') when the locking connection (R') is closed.

18. Plug-in coupling according to claim 17, characterized in that the coupling pin (6 ') has a bolt head (123) with a truncated cone-shaped outer surface (126), which upon insertion of the coupling pin (6') in the

Coupling body (4 ') with the teilkgelstumpffÖrmigen inner surfaces (114) of the coupling body (4') cooperate to lock the latching connection (R ').

19. Plug-in coupling according to claim 18, characterized in that the unlocking button (8 ') has a probe head (84') with radially inner ring-shaped, approximately axially extending actuating portions (128), with one end to a the touch surface (86 '. ) having concave bottom wall (129) are formed so that their free ends for releasing the latching connection (R ') are radially deflectable.

20. Plug-in coupling according to claim 19, characterized in that the free ends of the actuating portions (128) of the unlocking button (8 ') with closed latching connection (R') between the frusto-conical outer surface (126) of the bolt head (123) and radially inner abutment surfaces (116 ) of the latching hooks (72 ') forming radially inner wall portions (110) of the coupling body (4') engage, and for unlocking the latching connection (R ') the frustoconical outer surface (126) of the bolt head (123) slide along and thereby deflect the latching hooks (72 ') radially outward.

21. Plug-in coupling according to claim 20, characterized in that the frusto-conical outer surface (126) of the bolt head (123) with the central axis (X) of the plug-in coupling an angle (α ') includes, which is greater than the self-locking angle, which from the material pairing of coupling pin (6 ') and unlocking button (8') results, so that at the end of Öffhungsvorganges the operating portions (128) of the release button (8 ') the coupling pin (6') seek to move by means of adhesion in the opening direction.

22. Plug-in coupling according to one of claims 6 to 21, characterized in that the unlocking button (8, 8 ') at least two distributed over the circumference, axially extending guide segments (98, 98') which in the interior of the coupling body (4). can be inserted and axially guided on a cylindrical inner surface (52, 52 ') of the radially outer wall (12, 12') of the coupling body (4, 4 ').

23. Plug-in coupling according to claim 22, characterized in that the guide segments (98, 98 ') of the unlocking button (8, 8') are each provided with a radial latching projection (100, 100 '), which is provided with a latching shoulder (56; 56 ') of the coupling body (4; 4') cooperates to hold the unlocking button (8; 8 ') captive on the coupling body (4; 4').

24. Plug-in coupling according to one of claims 6 to 23, characterized in that the radially outer wall (10, 10 ') of the coupling body (4, 4') in the circumferential direction alternately arranged centering regions (28, 28 ') for centering the coupling body (4 4 ') in a receiving bore (A) of the first component (2) and mounting portions (30, 30') for holding the coupling body (4, 4 ') on the first component (2).

25. Plug-in coupling according to claim 24, characterized in that the centering regions (28, 28 ') of the radially outer sleeve-shaped wall (12, 12') of the coupling body (4, 4 ') with radially inner wall sections of the coupling ment body (4, 4 ') by tangentially extending ribs (18, 18') are connected to allow vibration-decoupling compensatory movements between the two components.

26. Plug-in coupling according to claim 25, characterized in that the centering regions (28, 28 ') of the coupling body (4, 4') on an annular flange

(16; 16 ') are formed, which cooperates with the mounting portions (30) of the coupling body (4) to hold the coupling body (4) on the first component (2).

27. Plug-in coupling according to claim 26, characterized in that the fastening regions (30, 30 ') of the coupling body (4, 4') consist of conically extending retaining segments (42, 42 ') which at their lateral longitudinal edges with the centering regions (28; 28 ') are connected, but otherwise unconnected, so that they are radially resiliently deformable.

28. Plug-in coupling according to claim 27, characterized in that between see the holding segments (42, 42 ') and the centering areas (28, 28') of the

Collar body (4; 4 ') has flutes (44; 44') for reducing the wall thickness of the radially outer wall (12; 12 ') of the coupling body in order to increase the radially resilient deformability of the retaining segments (42; 42').

29. Plug-in coupling according to one of the preceding claims, characterized in that the coupling body (4, 4 ') consists of a material which is selected from the group of the following materials: polyester-based thermoplastic elastomer, crosslinked elastomer, rubber, rubber.

30. Plug-in coupling according to one of the preceding claims, characterized in that the unlocking button (8, 8 ') consists of a plastic good elastic deformability, very high impact strength and high mechanical strength.

31. Plug-in coupling according to one of the preceding claims, characterized in that the coupling pin (6, 6 ') made of a plastic good elastic deformability, very high impact strength and high mechanical strength, or consists of a metallic core part in the form of a threaded body with external or internal thread and with a coating of a plastic high mechanical strength.

32. assembly for a plug-in coupling according to one of the preceding claims, consisting of a coupling body (4, 4 ') which is fastened to the first component (2), and a release button (8; 8'), from a neutral position in a Unlocked position is adjustable, in which he a detent connection (R, R ') between the coupling body (4, 4') and a coupling pin (6, 6 ') triggers.