Motor vehicle unit and method for producing a motor vehicle unit

[0001] The invention relates to a motor vehicle assembly unit consisting of a connector, in particular a quick coupling - and a pipe of a motor vehicle, the connector having an insertion end for insertion of the pipe conduit, with the securing pin, the outer sleeve and the securing pin at the end the outer sleeve has an annular insertion space for the pipe or the end of the pipe. Furthermore, the invention relates to a method of manufacturing a motor vehicle assembly unit consisting of a connector - in particular a quick coupling - and a motor vehicle pipe conduit. - Motor vehicle tubing means a motor conduit for liquid media in a motor vehicle, in particular for fuels, brake fluids or, for example, a urea solution for a motor vehicle catalyst system.

[0002] A mounting unit for a motor vehicle of the kind mentioned at the outset is known from EP 1 267 113 A1. The reliability of this known unit of the motor vehicle, especially at higher pressures and higher temperatures, leaves much to be desired.

[0003] Motor vehicle assembly units in various embodiments are also known from practice. Therefore, plastic vehicle tubing is known, e.g. from polyamide 12, with a coupling or a quick coupling coupling in which the tubing enters the coupling section of the coupling to form a force or friction connection. It is also known to provide a coupling section with protective profiling to better secure the pipe. However, many of the known motor vehicle assembly units have the disadvantage that the tubing at higher pressures and / or at higher temperatures is no longer functionally sufficiently reliable and effectively immobilized in the joint. The use of hose clamps and the like to improve fastening is complicated or expensive and causes geometric constraints. - Many known motor vehicle assembly units also have the disadvantage that the tubular ends connected to the joint are relatively unprotected against liquid media, especially corrosive liquid media, e.g. against water splashes.

[0004] Therefore, the basis of the invention is the technical problem of providing a motor vehicle assembly unit of the kind mentioned at the outset, in which the above-described disadvantages can be effectively avoided. Furthermore, the invention is based on the technical problem of providing a method for manufacturing such a motor vehicle assembly unit.

[0005] To solve this technical problem, the invention provides a motor vehicle assembly unit, which is characterized in that the outer sleeve is connected via at least one fracture element to a securing mandrel, wherein the at least one fracture element is formed in such a way that when the end of the piping slips over the securing rod or when the end of the piping is inserted into the annular insertion space, it breaks or breaks, so that the outer sleeve can be slid by or together with the inserted piping on the securing rod or further on the securing pin.

[0006] The pipe of a motor vehicle is also hereinafter briefly referred to as pipe. The pipe also means a hose to be connected to the connector. The cross-sectional area of ​​the pipe is intentionally circular or essentially circular. Within the scope of the invention, the tubing slides over the securing pin of the coupling, so that it is preferably kept in a fully inserted state by means of a force connection or a positive fit between the securing bolt and the outer sleeve. It is within the scope of the invention that the outer sleeve is formed in a cylindrical or substantially cylindrical shape. Furthermore, it is within the scope of the invention that the safety pin is internally shaped to be hollow for carrying a liquid medium. Preferably, the coupling or the quick coupling consists of plastic or essentially plastic. According to the invention, at least one element of a given breakthrough creates a place of a given breakthrough that is to be intentionally broken or torn apart.

[0007] It is within the framework of the invention that the connector according to the invention is a quick connector. As recommended, the connector or quick coupler has a connection section that is equipped with an opening receiving the plug element to accommodate the plug element. According to a preferred embodiment, the opening receiving the plug element has at least one latching projection or latching projections, which latching projection or which latching projections can / can be picked up / picked up by at least one projecting element on the outer surface of the plug element. The projecting element is formed more preferably on the plug element in the form of an annular bead or in the form of an annular projection. In the connected state, this bead or this projection then grips the latching projection or latching projections in the opening receiving the plug element of the coupling or the quick coupling. The plug-in element is in particular a connection element for the distal pipe.

[0008] According to a particularly preferred embodiment of the invention, the securing bolt on at least preferably thereof. In one plurality of the outer surface framework has securing profiling, securing profiling.

It is within the scope of the invention that the tubing can be slipped onto the security profile or security profile with the formation of a force or shape connection. More expediently, the tubing or end of the tubing is kept at least in a completely inserted state between the securing bolt or between at least one securing profile and the outer sleeve in the annular insertion space as jammed or by force connection / friction connection. As recommended, the relative rotation of the joint and pipe is blocked in this state. In the installed state or completely overlapped, at least in the area of ​​the outer sleeve, the securing profile or securing profile adheres / adheres directly to the inner surface of the pipe. It is within the scope of the invention that the security profiling or security profiling extends over the outer circumference of the security pin.

According to a preferred embodiment of the invention, the securing profiles are arranged in the longitudinal direction of the securing pin at least two behind each other.

[0009] It is within the scope of the invention that the outer sleeve is first placed on the end of the securing bolt lying on the pipe side. In this case, the outer sleeve is connected via at least one fracture element to the safety pin. Furthermore, it is within the scope of the invention that at least one element of a given fracture is located on the end-facing end of the outer sleeve which lies on the side of the connection section. This at least one element of the given fracture is intentionally located directly on the end of the outer sleeve lying on the side of the connection section, or the element of the given fracture is a component of this end end. According to an embodiment of the invention, the at least one element of the determined breakthrough extends around the inner circumference of the outer sleeve or around the outer circumference of the locking pin. It is also within the scope of the invention that many elements of a given fracture are provided around the inner circumference of the outer sleeve.

[0010] According to a particularly preferred embodiment of the invention, the outer sleeve has a press-on flange on the side of the connection section, against which the front end of the piping presses when sliding onto the securing bolt or during further sliding, so that the outer sleeve can be slid with the piping onto the securing bolt relatively slid on. When sliding over the safety pin, the pipe deliberately moves the outer sleeve in front of you. Preferably, the interference collar of the outer sleeve extends around the inner circumference of the outer sleeve. It is also possible, however, that individual flange sections separated by gaps are arranged on the inner circumference of the outer sleeve. It is recommended that at least one element of the given fracture from the side of the securing bolt is connected to the pressed flange, or that the rest of the set fracture element remains after the fracture of the set fracture element is connected from the securing bolt to the pressed flange.

[0011] A very advantageous embodiment of the invention is characterized in that the outer sleeve, after sliding onto the securing bolt or after completely sliding over the securing bolt, contacts its limiting flange with its end end. Thus, it is within the scope of the invention that the outer sleeve adheres to the limiting flange when it is completely slid onto the securing bolt with its end end facing away from the connection section. Deliberately, the limiting collar runs around the outer perimeter of the connector. Preferably, the limiting surface of this limiting flange is directed perpendicularly or substantially perpendicular to the longitudinal axis L of the joint. According to the recommendation, the surface of the end face lying on the side of the connection section of the front end of the outer sleeve is located perpendicularly or substantially perpendicular to the longitudinal axis L of the joint. It is within the scope of the invention that the limiting flange of the joint is located on the end of the securing bolt lying on the side of the connection section.

[0012] According to a preferred embodiment of the invention, the securing bolt has a conical section, the cone of the conical section narrowing towards the end pipe end lying on the securing mandrel. The outer sleeve may be purposefully slid with a force connection or friction connection onto the conical section. It is recommended that the outer sleeve be evenly sealed on the tapered section of the safety pin, especially at the end of the sliding process. It is within the scope of the invention that the conical section of the safety pin is in the direction of sliding of the outer sleeve or pipe before the connection limiting flange. Intentionally, the outer sleeve with its press-in collar can be pushed with a force connection or friction connection onto the conical section of the safety pin. According to the recommendation, the push-on flange adheres to the cone of the conical section after sliding or completely sliding under pressure or pretension.

Preferably, after sliding or completely sliding the outer sleeve, the end end of the tubing adheres to the withdrawal flange of the outer sleeve. Due to this sealing adhesion, the end of the pipeline is effectively protected against external influences, e.g. against water splashes.

[0013]

A particularly preferred embodiment of the invention is characterized in that at least one securing profile of the securing mandrel has a conical section or that many securing profiles each have a conical section. The corresponding cone of the conical section is intentionally tapered towards the protective pipeline on the side. This preferred end of the mandrel advantageous embodiment of the conical section facilitates sliding the tubing over the securing rod or sliding into the outer sleeve. According to a preferred embodiment of the invention, the at least one security profiling or security profiling is shaped like saw teeth.

[0014] It is within the scope of the invention that the outer sleeve is connected in one piece through at least one fracture element to the securing bolt before sliding the pipeline on. Intentionally, the outer sleeve and locking pin are formed as a one-piece injection-molded element. It is recommended that the outer sleeve should be cast together with a securing bolt or a joint through at least one breakthrough set point. When the pipeline is slid over the safety pin, at least one element of the given fracture is intentionally broken.

[0015] Furthermore, it is within the scope of the invention that at least one internal base part of the joint, in particular with a connection section, with a safety pin and formed only as an artificial, and especially the outer sleeve is one plastic part as only one injection molded part. Basically, the base part can be an entire connector. However, it is also possible that the base part of the connector is sprayed with plastic and / or surrounded by a housing. According to the recommendation, the base part of the connector has a central section or a central section located between the connection section and the securing pin.

[0016] The invention also relates to a method for manufacturing a motor vehicle assembly unit consisting of a connector - in particular a quick coupling - and a pipe for a motor vehicle, wherein the base part of the connector is manufactured with a securing pin at the inserted end and surrounding a securing pin and an external sleeve connected via at least one element of the given fracture with a safety pin, wherein the end of the pipe is inserted into the annular insertion space formed between the outer sleeve and the securing pin, so that at least one element of the given fracture breaks and whereby then the assembly unit consisting of the pipe or end of the pipe and the outer sleeve is pushed or further slipped onto the securing pin. It is within the framework of the invention that the base portion of the connector is manufactured by molding

The unit of the invention is an external sleeve and thus not injection.

[0017] The invention is based on the observation that in the case of a motor vehicle assembly unit according to the invention it is possible to functionally and effectively securely fasten the motor vehicle cable to the connector. This connection is also resistant to higher pressures and / or higher temperatures. assembly of a motor vehicle according to can be carried out in a simple, low-complicated and especially also inexpensive way. The invention also has the advantage that the particles that form during the production of the connection between the joint and the pipe end are retained in the intermediate space between the securing mandrel, contaminating the system or assembly unit. In addition, the end of the pipe connected to the coupling is not exposed to the environment or environmental influences and rather fits tightly in the intermediate space between the outer sleeve and the securing pin. Accordingly, protection against splashes of salt water or the like is also provided for the end of the pipeline. The inventive configuration of the motor vehicle assembly unit also provides an effective control function for checking that the tubing is completely slid onto the securing bolt. In the case of a total or form-fit connection of the end-lying outer end of the sleeve sleeve to the coupling flange, it can be assumed that the pipeline is completely extended and thus the connection has been created as being functionally reliable and effective.

[0018] The invention is explained in more detail below with reference to a drawing showing only one embodiment. The individual figures show schematically:

Fig. 1 the motor vehicle assembly unit in a first operating position,

<td>FIG.</td><td> 2</td><td>object according to fig.</td><td>1 in the second</td><td>positions</td>

<td></td><td></td><td>actions,</td><td></td><td></td>

<td>FIG.</td><td> 3</td><td>object of fig. 1</td><td>in the third</td><td>positions</td>

<td></td><td></td><td>actions, a</td><td></td><td></td>

<td>FIG.</td><td> 4</td><td>object according to fig.</td><td>1 in the fourth</td><td>positions</td>

actions.

[0019]

The figures show a motor vehicle assembly unit according to the invention consisting of a quick coupler 1 and a pipe 2 for a motor vehicle. The quick coupler 1 has a slide end 3 for inserting a pipeline 2. On the opposite side of this slide end 3, preferably in the embodiment, the section 8 of the quick coupler 1 is arranged, which has connections with an opening 9 for housing the plug element to accommodate the plug element preferably

10. The opening 9 housing the plug element and in the embodiment has latch projections 11, wherein the latch projections 11 can be picked up by an annular bead protruding element 12 on the outer surface of the plug element 10. At the slide end 3 of the quick coupler 1 there is a securing pin 4 which is surrounded by the outer sleeve 5. An annular insertion space 6 for insertion of the pipe 2 or the end of the pipe 2 is arranged between the securing pin 4 and the outer sleeve 5.

[0020] Fig. 1 shows the quick coupler 1 with the pipe 2 not yet inserted. The outer sleeve 5 intentionally and in the embodiment is shaped as cylindrical and preferably and in the embodiment runs along the outer circumference around the quick coupler 1 or securing pin 4. In accordance with the recommendation and embodiment, the outer sleeve 5 is connected to the securing bolt 4 through the element 7 of the set fracture 4, preferably in the assembled state of the conduit 2. Preferably, in the embodiment, the element 7 of the set breakthrough is an annular element 7 of the set fracture that deliberately runs around along the entire circumference of the locking pin 4. The part 7 of the given fracture as recommended and in the embodiment consists, like the outer sleeve 5 and the securing pin 4, of plastic. The part 7 of the given fracture is made in such a way that it breaks or breaks when the pipe 2 is inserted into the annular insertion space 6, so that the outer sleeve 5 can be pushed through the inserted pipe 2 or together with it onto the securing pin 4. This is in particular due to the comparative consideration of Figures 2 to 4.

[0021] It is furthermore clear from Fig. 1 that, prior to insertion of the piping 2, the element 7 of the given fracture is preferably and in the embodiment located at the end-facing end 14 of the outer sleeve 5, namely directly at the end-facing end 14 the outer sleeve 5. Furthermore, preferably and in the embodiment, the securing bolt 4 has tooth-shaped securing saws 13 on its outer surface. According to the recommendation, the pipe 2 can be pushed onto the securing profiling 13 with the formation of a force connection (see in particular Fig. 4). The pipe 2 is therefore somehow stuck between the outer sleeve 5 and the security profiling 13. Preferably, and in the embodiment, the tooth-shaped securing saws 13 each have a conical section 19, where the cone of the conical sections 19 tapers towards the end pipe end lying on the pipe end of the securing bolt 4. This design facilitates sliding the pipe 2 onto the securing bolt 4.

[0023] Intentionally and in the embodiment, the outer sleeve 5 after sliding over the securing bolt 4 or after completely sliding over onto the securing bolt 4 with its front end is adjacent to the limiting flange 16 of the quick coupler 1. The outer sleeve 5, after completely sliding, rests against this limiting flange 16 of the quick coupler 1.

Preferably, the embodiment limiting collar 16 extends around the outer periphery of the quick coupler limiting the surface

1. It is recommended that the limiting collar 16 was positioned perpendicular to the longitudinal axis L of the quick coupler 1. Preferably also the surface of the front end of the outer sleeve 5 is perpendicular to the longitudinal axis L of the quick coupler 1. The limiting flange 16 is also located on the lying side side of the connection end of the securing pin 4. It has proved to be advantageous that the securing pin 4 has a conical section 17, the cone of this conical section 17 tapering towards the end pipe 18 lying on the pipe side. According to a preferred embodiment and in the embodiment, the outer sleeve 5 can be slid to form a force connection or friction connection to a conical section 17. This is in particular due to the comparative consideration of Figures 3 and 4. Thus, the outer sleeve 5 can be clamped on the conical section 17 and, as recommended, the interference flange 15 with pre-tension adheres to the conical section 17. It can be seen in the figures that the conical section 17 of the securing pin 4 is preferably arranged in the direction of the outer slide in the embodiment. sleeve 5 or pipe 2 upstream of the stop collar 16 of the quick coupler 1. Deliberately and in the embodiment in the completely extended condition of the outer sleeve 5 (Fig. 4), the front end 22 of the piping 2 adheres tightly to the press-on flange 15 of the outer sleeve 5. In this way, effective protection of the end of the pipeline against adverse external influences, such as e.g. water splashes.

In the figures, the quick coupler 1 is shown in the form of a base part 20, which base part 20 comprises a connection section 8, a middle section 21, a securing pin 4 and an outer sleeve 5. Preferably and in the embodiment this base part is formed as a one-piece molded element. injection molded and was therefore produced as part of the injection molding process.

[0025] Preferably, especially the outer sleeve 5 before sliding the pipe 2 (Fig. 1) is connected in one piece through the fracture element 7

As already stated with the security bolt 4. this has been explained above, the fracture element 7 breaks when the piping 2 is inserted or when the load of the fracture element 7 is loaded by the piping 2.

[0026] The base part 20 shown in the figures may in principle also be surrounded by a plastic cover not shown. Then, the base part 20 together with this plastic cover forms a quick coupling 1. Thus, the base part 20 can for example be covered with plastic or the base part 20 can also be placed in a housing not shown.

TI Automotive (Fuldabr ^ ck) GmbH Full representative:

42P36943PL00

EP 2 738 435 B1