DE102017115478A1 - Arrangement for connecting a pipe to a connector - Google Patents

Abstract

The invention relates to an arrangement for connecting a line (1) with a connecting piece (2), in particular for a release system of a motor vehicle, wherein according to the invention on an outer diameter (d1) of the line (1) a locking ring (3) is arranged, which has an outer contour has, which forms a counter profile to an inner contour of the connecting piece (2).

Description

The invention relates to an arrangement for the connection of a line with a connector and finds particular application for a release system.

To produce a mechanical connection, for example, with other lines or components, pressure lines end connectors on which the ends can be designed as a plug-in part (connection piece) or as a female part (connector socket). Accordingly, the associated end of the line to be connected or the associated terminal of the component to be connected is designed to be complementary as a socket part or as a plug-in part. To ensure a sealing connection between the plug and socket part annular sealing elements are preferably provided, which are either pushed over the male part or introduced into the female part before each of the male part is inserted into the female part. For axial and radial positional fixation locking or holding elements are provided on the connecting elements (plug-in part and socket part).

In the automotive industry often standardized connectors / connectors are used, which are secured by retaining clips.

Such a connector assembly is used for example in the DE 10 2007 003 048 A1 described. In this case, the plug-in connection for connecting pressure lines of a hydraulic system has a first connection element designed as a connection socket / socket part and at least one second connection element designed as a connection piece / plug-in part, which are each provided at one end of the pressure lines to be connected. In addition, a arranged in a receiving area of the connecting piece, designed as an O-ring, sealing element and the common fastening of the connecting elements serving, designed as a safety clip, spring clip are provided. During assembly, the connection piece is pushed into the opening of the connection socket with the sealing element held between two bulbous elevations of the connecting piece. Upon reaching an end position is carried out by the insertable into a recess of the connector spring clip an axial fixation of the connecting piece. In this case, a further, radially encircling, bead-shaped elevation on the connecting piece serves as a stop.

A disadvantage of the use of such spring clip / retaining clips is the consequent additional installation effort. Also, the release of the spring clip is relatively complicated, since it must be spread radially outwards by means of a special tool and thereby solved. In addition, these compounds are not executed captive. In many cases, the recording of the retaining clip is afflicted, so that it can be inserted into the receptacle. This game leads after assembly to a pressure and a leakage at the junction.

Another compound for plastic pipes is from the DD 33 440 A1 known. In this a plastic tube between a forming double cone and a clamping ring is clamped.

Also known is the insertion of connecting pieces in the end region of a pipe or hose, wherein a part of the connecting piece projects out of the pipe or hose and is inserted into a connecting element with a projection extending radially beyond the outer diameter of the pipe or hose. Such solutions are used for example in the DE 36 08 843 C2 , of the DE 26 12 871 A1 , of the DE 42 40 816A1 , of the DE 44 30 114 C2 , of the DE 197 52 806 A1 and the DE 10 2010 039 541 B4 Disadvantages here are always a relatively complicated technical structure of the inserted into the tube connector and the fact that the connector must have in its protruding end portion an exact fit to the connector.

It is also known to connect connectors by a welding process, for example in plastic pipes or crimping in steel pipes with the respective lines.

However, this leads to increased production times and thus to rising costs.

Furthermore, it proves disadvantageous that the connection depends on many different factors by means of welding.

The object of the invention is therefore to provide an arrangement that meets the requirements in terms of manufacturing times and costs.

This object is achieved with the characterizing features of the first claim.

Advantageous embodiments emerge from the subclaims.

The arrangement for connecting a line to a connector, is used in particular a release system of a motor vehicle application, wherein according to the invention on an outer contour of the line a locking ring is arranged to which has an outer contour which forms a counter profile to an inner contour of the connecting piece.

Preferably, the line is made of plastic and the locking ring made of metal, for example steel or copper.

In particular, the inner diameter of the locking ring over the entire length corresponds approximately to the outer diameter of the conduit.

Advantageously, a metal insert is pressed into the inner diameter of the conduit.

The metal insert has at its outer diameter at least one, preferably at least two circumferential grooves.

Furthermore, the metal insert can advantageously have a fir-tree structure at its outer diameter.

Grooves and / or Christmas tree structure advantageously prevent a release of the conduit from the connector. In addition, the end of the line is extended by the metal insert. Characterized the outer diameter of the conduit is pressed against the inner diameter of the locking ring, whereby an axially fixed and rotationally fixed connection between the end of the conduit and the locking ring is provided.

The connector preferably has a first end and a second end, wherein in the first end of the line is inserted into mounting insertion in an insertion region.

Further preferably, the connecting piece has a first inner diameter in the direction of the first end and a second inner diameter in the direction of the second end, wherein the first inner diameter is greater than the second inner diameter. The transition from the first to the second inner diameter of the connecting piece is preferably conical.

According to the invention the locking ring on its outer contour on a counter-profile to the inner contour of the connecting piece. The locking ring in this case has a first outer diameter corresponding to the second inner diameter of the connecting piece and a second outer diameter which is larger than the first outer diameter. The transition from the first to the second outer diameter of the locking ring is preferably continuous and in particular also conical as in the connector.

In particular, in the areas of its conical shape, the connecting piece and the locking ring have the same cone angle.

The locking ring is in particular formed in one piece or in two parts.

In the two-part design, the two halves are plugged or clipped together. The two halves can also be connected to each other via a hinge or joint.

In particular, a wire form spring is arranged on the first outer diameter of the line, which is introduced through a housing groove in the connecting piece and forms a stop for the locking ring. The locking ring adjoins with a first end face to the wire-forming spring.

At the first outer diameter of the line is further preferably arranged on one of the first end face of the locking ring opposite the second end face of the locking ring adjacent O-ring seal whose outer diameter corresponds to the second inner diameter of the connecting piece.

Preferably, the locking ring according to the invention is a metal ring.

Particularly preferably, the locking ring is made of steel. Further preferably, the metal insert is made of steel.

Alternatively, the locking ring can be made of a plastic or fiber-reinforced plastic.

The connecting piece is preferably made of metal or plastic, for example fiber-reinforced plastic.

The wall of the line, which consists of plastic, is pressed radially when pressing the metal insert to the outside and thereby pressed against the inner diameter of the locking ring and optionally compressed between the locking ring and the metal insert. As a result, a detachment of the line from the connector is prevented when pressurized and provided a pressure-tight connection.

The solution according to the invention advantageously no longer requires welding. Both the process time in the assembly of the device according to the invention, as well as the production costs are thus reduced.

Furthermore, the rejection rate is reduced by the invention, which usually arises during the welding process.

In addition, the size of the components - in particular of locking ring and connector can be realized by the inventive solution, since no additional length for welding is required. As a result, a smaller space is required for the connection arrangement.

Overall, a simple and space-saving arrangement for the connection of a cable with a connector is created, which additionally ensures a simple and reliable installation.

The invention will be explained in more detail with reference to an embodiment and an associated drawing, without being limited to this.

• 1: einen Längsschnitt durch eine erfindungsgemäße Anordnung.

Showing:

• 1 : a longitudinal section through an inventive arrangement.

1 shows a longitudinal section through an inventive arrangement. A connector 2 has a first end 2.1 and a second end 2.2 on. In the first end 2.1 is a lead 1 can be inserted into an insertion area in the mounting direction. The connector 2 points towards the first end 2.1 a first inner diameter D1 and towards the second end 2.2 a second inner diameter D2 on, wherein the first inner diameter D1 greater than the second inner diameter D2 , Between the first inner diameter D1 and the second inner diameter D2 there is a conical transition.

On the outside diameter of the pipe 1 is a locking ring 3 arranged in the connector 2 is pluggable. The locking ring 3 has one with the second inner diameter D2 of the connector 2 corresponding first outer diameter d2 and a second outer diameter d3 which is larger than the first outer diameter d2 , The transition from the first d2 to the second outer diameter d3 of the locking ring 3 also takes place here conical.

In the in 1 shown assembled state, the locking ring extends 3 with its first outer diameter d2 over a length range of the first inner diameter D1 of the connector 2 and with its second outer diameter d3 over a length range of the second inner diameter D2 of the connector 2 ,

In the inner diameter of the pipe 1 is a metal insert 4 pressed. The metal insert 4 indicates its outer diameter d4 several circumferential grooves 4.1 on, the part of a fir-tree structure 4.2 on the outside diameter d4 of the metal insert 4 one are. The fir tree structure 4.2 advantageously prevents loosening of the line 1 from the metal insert 4 , In addition, the end of the line 1 through the metal insert 4 radially outward against the inner diameter D3 of the locking ring 3 pressed, since the outside diameter d4 of the metal insert 4 is slightly larger than the inner diameter D3 the line 1 ,

On the first outside diameter d1 the line 1 is in the assembled state in the range of the first inner diameter D1 a wire-shaped spring 5 for locking the locking ring 3 arranged, which through a housing groove in the connector 2 is introduced. The locking ring 3 it borders with a first face 3.1 to the wire form spring 5 at.

At the first outside diameter d1 the line 1 is still one, to one of the first end face 3.1 of the locking ring 3 opposite second end face 3.2 of the locking ring 3 adjacent, O-ring seal 6 arranged, whose unsigned outer diameter with the second inner diameter D2 of the connector corresponds. The inner diameter of the O-ring seal 6 corresponds to the outside diameter d1 the line 1 ,

The administration 1 dominates the front 3.2 by an unspecified length, ensuring a secure fit of the O-ring seal 6 guaranteed.

The connector 2 For example, it may be designed or arranged in the manner of a connecting piece on a master cylinder or slave cylinder, not shown, or else another element of a release system.

On the line 1 become from the direction of the unspecified end of the line until the locking ring 3 and then the O-ring seal 6 postponed. Now the metal will be used 4 in the inner diameter D3 the line 1 pressed.

The administration 1 with the locking ring 3 Then simply in the mounting direction (direction of the bold arrow) in the connector 2 plugged. The O-ring seal 6 seals between the connector 2 , the locking ring 3 and the line 1 from. Subsequently, the wire shape spring 5 through a housing groove in the connector 2 introduced, such that the locking ring 3 with his first front page 3.1 to the wire form spring 5 borders.

LIST OF REFERENCE NUMBERS

1

management

2

joint

2.1

first end

2.2

second end

3

Restraining

4

metal insert

4.1

groove

4.2

Tannenbaum structure

5

Wire form spring

6

O-ring seal

D1

first inner diameter of the connecting piece

D2

second inner diameter of the connecting piece

D3

Inner diameter of the pipe

d1

Outer diameter of the pipe

d2

first outer diameter of the locking ring

d3

second outer diameter of the locking ring

d4

Outer diameter of the metal insert

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102007003048 A1 [0004]
• DD 33440 A1 [0006]
• DE 3608843 C2 [0007]
• DE 2612871 A1 [0007]
• DE 4240816 A1 [0007]
• DE 4430114 C2 [0007]
• DE 19752806 A1 [0007]
• DE 102010039541 B4 [0007]

Claims (10)

Arrangement for connecting a line (1) to a connecting piece (2), in particular for a release system of a motor vehicle, characterized in that an arresting ring (3) having an outer contour is arranged on an outer diameter (d1) of the line (1). which forms a counter profile to an inner contour of the connecting piece (2). Arrangement according to Claim 1 , characterized in that - the line (1) made of plastic and / or - the locking ring (3) made of metal or plastic or of a combination of materials of the aforementioned materials and / or - the connector (2) made of metal or plastic or of a combination of materials the aforementioned materials is made. Arrangement according to Claim 1 or 2 , characterized in that the inner diameter of the locking ring (3) over the entire length of the locking ring (3) corresponds approximately to the outer diameter (d1) of the conduit (1). Arrangement according to one of Claims 1 to 3 , characterized in that in the inner diameter (D3) of the line (1) a metal insert (4) is pressed. Arrangement according to Claim 4 , characterized in that the metal insert (4) has at its outer diameter (d4) at least one circumferential groove (4.1). Arrangement according to Claim 4 or 5 , characterized in that the metal insert (4) has at its outer diameter (d4) a Christmas tree structure (4.2). Arrangement according to one of Claims 1 to 6 , characterized in that the connecting piece (2) has a first end (2.1) and a second end (2.2), wherein in the first end (2.1) in a mounting direction, the line (1) with the locking ring (3) can be inserted, wherein the connecting piece (2) has a first inner diameter (D1) in the direction of the first end (2.1) and a second inner diameter (D2) in the direction of the second end (2.2) and wherein the first inner diameter (D1) is greater than the second inner diameter (D2) and wherein the locking ring (3) has a first outer diameter (d2) corresponding to the first inner diameter (D1) of the connecting piece (2) and a second outer diameter (d3) corresponding to the second inner diameter D2. Arrangement according to one of Claims 1 to 7 , characterized in that the locking ring (3) is formed in one or two parts. Arrangement according to one of Claims 1 to 8th , characterized in that at the first outer diameter (d1) of the line (1) a wire-shaped spring (5) for locking the locking ring (3) is arranged and that the locking ring (3) with a first end face (3.1) to the wire-forming spring (5) borders. Arrangement according to Claim 8 , characterized in that at the first outer diameter (d1) of the line (1) an O-ring seal (6) adjoining a second end face (3.2) of the locking ring (3) opposite one of the first end face (3.1) of the locking ring (3) is arranged, whose outer diameter corresponds to the second inner diameter (D2) of the connecting piece (2).

Images