DE102013021678B3 - Sealing plug for a quick coupling - Google Patents

Abstract

A closure plug for a quick coupling has a cup-shaped sealing portion 10 for engagement with the seal provided in the socket of the coupling, a cylindrical fixing portion 20 adjoining the sealing portion 10 for engagement with a locking member provided in the sleeve 40 and an outer handling portion adjoining the fixing portion 20 30, wherein these three sections 10, 20, 30 are parts of a one-piece component.

Description

State of the art

A quick coupling usually comprises a socket with an opening for receiving a pipe socket, wherein inside the socket, a seal, for example in the form of an O-ring, and a locking element for the pipe socket, for example in the form of a snap ring, are arranged.

Until the time of installation, in which the pipe socket is inserted into the coupling socket and locked there, it is expedient to protect the bush against the ingress of dirt. At the same time, the possibly already acted upon with the fluid and pressurized coupling socket should be closed.

Out DE 10 2013 206 104 A1 a closure element for a hydraulic connection system is known, which is not readily usable in quick couplings.

Summary of the invention

The invention has for its object to provide an inexpensive and easy to handle sealing plug for this purpose. In particular, the plug should be removable without the need for special tools at the required pressure resistance.

The solution of this problem is achieved with the closure stopper specified in claim 1. In this, the three of the sealing, fixing and handling functional areas are formed on a simple and easy-to-use, one-piece and possibly made of plastic component.

The other claims relate to appropriate embodiments of the sealing plug according to the invention.

Brief description of the drawing

An embodiment of the invention will be explained below with reference to the drawing. It shows

1 a sealing plug in longitudinal section,

2 a perspective view of the sealing plug after 1 and

3 a sectional view of a coupling socket with plugged plug after 1 and 2 ,

Detailed description of the embodiment

The one-piece plug shown in the drawing comprises a generally cup-shaped sealing portion 10 , an adjoining fixation section 20 and a subsequent handling section 30 ,

The sealing section 10 has one with a bottom 11 closed cylindrical area 12 on, according to 3 for engagement with one in the coupling socket 40 arranged sealing element 41 is determined. In 3 is as a sealing element 41 an O-ring shown. (The O-ring 41 is basically for sealing the pipe socket in the coupling socket 40 provided.) The cylindrical portion 12 The sealing plug is equally suitable for other sealing elements, such as radial shaft seals.

One between the ground 11 and the cylindrical section 12 trained bevel 13 facilitates insertion into the coupling socket 40 , In particular, can be because of the chamfer 13 the O-ring 41 and the snap ring 42 When engaging, push apart with little force, which simplifies assembly.

The fixation section 20 has a covenant at its periphery 21 for engagement with one in the socket 40 existing locking element 42 on that in 3 is shown as a snap ring. (The snap ring 42 basically serves to lock the pipe socket in the coupling socket 40 .) The for the intervention between the federation 21 and the snap ring 42 required elasticity is by a between the sealing portion 10 and the fixation section 20 intended weakening range 22 and three slots extending to this area and open to the outer end of the plug 23 reached. The weakening area 22 is designed as an inner annular groove and defines a clear bending point and thus a clear lever ratio. As a result, an independent release of the sealing plug from the coupling socket 40 prevented.

The handling section 30 consists in the illustrated in the drawing embodiment of three circumferentially uniformly arranged wings 31 passing through the slots 23 formed parts of the fixing section 20 Continue towards the open end of the stopper. The wings 31 put on the fixation section 20 with an outward bow 32 at. If they are compressed, this results in the region of the fixation section 20 a diameter reduction, which is the insertion and fixing of the sealing plug in the coupling socket 40 and in particular facilitates its disassembly. The outer surfaces of the wings 31 are by ribs 33 and a collar provided at its free end 34 handy.

Instead of the three slots assumed in the drawing 23 and three wings 31 only two can be provided in each case. Such a (not shown) embodiment is particularly suitable for a mechanical handling of the sealing plug by means of robotic grippers.

Experiments have shown that the plug described with a diameter of 12 mm not only withstand the required pressure of 3 bar, but up to 7 bar, the opening of the clutch box securely closes.

LIST OF REFERENCE NUMBERS

10

sealing section

11

ground

12

cylindrical area

13

chamfer

20

fixing section

21

Federation

22

weakening region

23

slot

30

handling section

31

wing

32

bow

33

ribs

34

Federation

40

Kupplungsbuchse

41

O-ring

42

snap ring

Claims (7)

Sealing plug for a quick coupling, which has a bushing ( 40 ) with an opening for receiving a pipe socket and inside a seal ( 41 ) and a locking element ( 42 ) for the pipe socket, comprising a cup-shaped sealing portion ( 10 ) for engagement with the in the socket ( 40 ) existing seal ( 41 ), one to the sealing section ( 10 ) subsequent cylindrical fixation section ( 20 ) for engagement with the locking element ( 42 ) and one to the fixation section ( 20 ) subsequent outer handling section ( 30 ), these three sections ( 10 . 20 . 30 ) Are parts of a one-piece component. A sealing plug according to claim 1, wherein the sealing portion ( 10 ) with the fixing section ( 20 ) over a flexible area ( 22 ) connected is. A sealing plug according to claim 1 or 2, wherein the fixing portion ( 20 ) with longitudinal slots ( 23 ) is provided. Closure stopper according to one of the preceding claims, wherein the fixing portion ( 20 ) at its periphery a projection ( 21 ) for engagement with the locking element ( 42 ) having. Closing plug according to one of the preceding claims, wherein the handling section ( 30 ) at least two wings ( 31 ), which have towards the outer end increasing distances from each other. A sealing plug according to claim 5, wherein the wings ( 31 ) on its outside with ribs ( 33 ) are provided. A stopper according to claim 5 or 6, wherein the wings ( 31 ) at their ends in each case an outwardly facing collar ( 34 ) wear.

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