Plug-in coupling having an elastically deformable coupling part and installation method therefor
An elastically deformable coupling part for a plug-in connection for connecting a first component and a second component, has an inner connection portion, in which a head of a pin-like element of the second component can be accommodated by a detent or snap-in connection. In addition, the coupling part has an outer fastening portion, which can be connected to a keyhole of the first component by a bayonet closure. The fastening portion comprises at least one radial contact surface. At least one first radial projection, which forms a bayonet gap for a rotational accommodation of the first component, is arranged at an axial distance from the radial contact surface. At least one second radial projection, which forms a locking gap for the first component between the second projection and the radial contact surface by a movability directed inward, is arranged at an axial distance from the radial contact surface.
1. An elastically deformable coupling part for a plug-in connection for connecting a first component and a second component, the coupling part comprising:
a. an inner connection portion, in which a head of a pin element of the second component can be accommodated by means of a detent connection, and an outer fastening portion, which is connectable with a keyhole of the first component by a bayonet closure, wherein
b. the fastening portion comprises at least one radial contact surface, at least one first radial projection being arranged at an axial distance from the at least one radial contact surface, wherein the at least one first radial projection forms a bayonet gap for a rotational accommodation of the first component, and at least one second radial projection being arranged at an axial distance from the at least one radial contact surface, wherein the at least one second radial projection forms a locking gap for the first component between the at least one second radial projection and the at least one radial contact surface by a movability directed radially inward so that the at least one second radial projection is resiliently arranged in a radial direction, wherein
c. the at least one first and the at least one second radial projection are arranged circumferentially offset with respect to each other, and
d. the bayonet gap is blocked after a certain length by means of an axial projection in coordination with an arrangement of the at least one second radial projection so that the first component in an area of the keyhole cannot be removed from the locking gap during a rotation of the coupling part around a longitudinal axis.
2. The coupling part according to claim 1 , in which the bayonet gap is formed in a tapering manner at least partially in a radial and/or an axial direction of the coupling part, in order to support a reliable hold on the first component.
3. The coupling part according to claim 2 , in which a web structure is provided next to an insertion opening for the pin element, with which the coupling part can be inserted into the keyhole.
4. The coupling part according to claim 1 , in which the locking gap is formed at least partially tapered in an axial direction with respect to the coupling part.
5. The coupling part according to claim 1 , in which a web structure is provided next to an insertion opening for the pin element, with which the coupling part can be inserted into the keyhole.
6. The coupling part according to claim 1 , in which the at least one radial contact surface is formed by a circumferential and continuous contact flange.
7. The coupling part according to claim 6 , in which the contact flange is formed as a sealing lip, which completely covers the keyhole due to the radial expansion.
8. The coupling part according to claim 1 , which is made of an elastic plastic or metal.
9. A plug-in coupling, which comprises a coupling part according to claim 1 and a pin element with a head.
10. A component with a pin element and a head, which is connected with another component via a coupling part according to claim 1 , which is arranged in a keyhole of the other component.
11. The coupling part according to claim 1 , in which the bayonet gap is formed in a tapering manner at least partially in a radial and/or an axial direction of the coupling part, in order to support a reliable hold on the first component.
12. The coupling part according to claim 1 , in which the locking gap is formed at least partially tapered in an axial direction with respect to the coupling part.
13. The coupling part according to claim 2 , in which the locking gap is formed at least partially tapered in an axial direction with respect to the coupling part.
14. The coupling part according to claim 1 , in which a web structure is provided next to an insertion opening for the pin element, with which the coupling part can be inserted into the keyhole.
15. An installation method of a coupling part according to claim 1 into a keyhole of the second component, which comprises the steps:
a. aligning of the coupling part on the keyhole so that the at least one first radial projection is arranged opposite a web bulge of the keyhole,
b. inserting of the coupling part in an axial direction into the keyhole and at the same time compressing of the coupling part in a radial direction in order to lock the first component in the locking gap and
c. rotating of the coupling part around a longitudinal axis such that the first component is fastened in the bayonet gap.
16. The installation method according to claim 15 , wherein the coupling part is inserted so far into the keyhole in the axial direction until the at least one radial contact surface rests on the component.
17. The installation method according to claim 16 , wherein a web structure near an insertion opening for a pin element is used to rotate the coupling part around the longitudinal axis.
18. The installation method according to claim 15 , wherein a web structure near an insertion opening for a pin element is used to rotate the coupling part around the longitudinal axis.