DE19533920A1 - Connection hose fastening device - Google Patents

Abstract

The device has a cylindrical sleeve (11) at one end (8) of the connection hose (2). The sleeve has elements (15) for its releasable fastening to a connection socket (3). The socket has similar elements (16) for fastening to the hose. The elements are located or formed in a sleeve (22) of rigid plastics. The plastics sleeve has a ring (17) of slightly less rigid plastics on its outside (21). The ring is welded to the component (4) surrounding the connection socket. Sleeve and ring are a modular injection-moulded part. The sleeve contains sealing elements.

Description

The invention relates to a device for releasably connecting a connector dungsschlauches each with a component made of plastic, in particular a front Direction for the connection between a fuel tank and a filler pipe of a motor vehicle, according to the preamble of claim 1.

From DE-OS 36 35 469 there is already a flexible connecting hose between a fuel tank and a filler neck known. This connection The hose consists of two corrugated tubes which are inserted into each other and which are cylindrical have formed end regions. The connecting hose is on connection neck of the fuel tank and on an end portion of the filler zens plugged in and by means of fastening elements such as a hose clamps or the like, attached. The parts mentioned preferably exist made of a diffusion resistant plastic.

An adequately long socket is required to attach the end areas of the corrugated pipes or free section required. As a result, the assembly space in the motor vehicle constricted. In addition, there is a high assembly effort when pushing the loading fastening elements over the end areas of the connecting hose and at Fasten the end areas using appropriate handling devices. The Befe Means of cleaning require exact adherence to the assembly instructions and a regular inspection so that there are no leaks at the connection point len can come.

The object of the invention is a device for releasably connecting the ends to create a connecting hose, each with a plastic component, in which the disadvantages of the prior art are avoided.

This object is achieved in a device according to the invention at the outset named type by the features of the characterizing part of claim 1 ge solves.

With the device according to the invention, the connection between a Connection hose and a component, such as the housing of one Fuel tank and / or a filler pipe without the use of factory witness. The device according to the invention can also be used in air conditioning systems for air routing and in cooling circuits for conveying liquids such as Water, oil or the like can be used.

This is made possible by the interlock between the connection hose and the components essentially positive and additionally given if necessary, frictionally via spring elements. The springy elements can be used as a locking ring or a bushing in the axial direction stretching resilient wall sections separated by slots are or be formed by a securing clip.

It is particularly advantageous that the sleeve of the connecting piece made of polyamide or the like, which provides excellent rigidity and optima les creep behavior is given. On the sleeve is a ring cohesive and against if necessary also molded. This results in a large strength speed between the sleeve and the ring. The ring is made of polyethylene or the like, thereby welding with a component made of polyethylene or the like with the required quality possible.

It is also possible to use materials of the same type which have a similar structure are (e.g. polyolefins with each other) and / or one or more similar chemi have cal and / or physical properties and / or ver are inert and / or part of which a plastic as a component  a mixture or alloy with one or more other plastics in the same plastic is included.

Through the permanent connection of the sleeve to connect to the ring the component achieves a high level of tightness and improper handling exercise avoided. Improper handling can, for example, at The use of fasteners such as hose clamps results in that the hose clamps are either not tightened enough or the fe connection is not checked regularly. This results in the invent device according to the invention the desired tightness without an additional Maintenance effort. As. Welding process between the polyethylene parts preferably mirror welding or vibration welding applied.

Due to the integrated design of the connecting piece, there is only a small amount easily over the housing or the component protruding edge or nozzle. in the By comparison, protruding Ab when using hose clamps cuts with a length of up to 3 cm and more are required.

The connection hose is manufactured by attaching to a corrugated tube made of polyethylene or the like a cylindrical section made of polyamide or the like is injected, the injection also carried out vice versa can be. In addition, at an external joint between the Corrugated pipe and the bush subsequently a locking ring made of polyamide or same can be sprayed on.

The sealants used, e.g. B. O-rings are made of NBR or Viton. Of the Circlip, the spacer or spacers and the one at the bottom Stop ring arranged at the end of the sleeve preferably consist of polyamide or similar. The securing clip is preferably made of spring steel poses.

Another advantage of the device according to the invention is that the connecting piece additional components can be arranged or integrated. Such additional components can, for example, valves, for. B. check valves or Pressure relief valves, throttles, check valves or filters.  

The device according to the invention reduces the assembly costs. The high mechanical strength and the good tightness reduce the Permeation and / or diffusion of gases in the connection area. Due to the ver Using thermoplastic corrugated pipes results in good recycling availability. The compact design means that less space is required. The The device according to the invention accordingly also has a lower weight on. Due to the structure of the invention, the application is easier and be established sealing principles z. B. in the form of rubber sealing rings possible.

Embodiments of the invention are described below with reference to the drawings described as an example. Show:

Figure 1a is a longitudinal section through an end portion of a first embodiment form of a connecting hose with a corrugated tube arranged thereon, which is only partially shown.

Fig. 1b is a longitudinal section through a first embodiment of a connec tion connector, which can be connected to the connecting hose shown in Fig. 1a, wherein the connecting piece is arranged in an opening formed in a housing;

FIG. 2a shows a longitudinal section through an end portion of a second embodiment form of a connecting tube;

Fig. 2b shows a longitudinal section through a second embodiment of a connec tion spigot which can be connected to the connecting hose shown in Fig. 2a;

Fig. 2c is a plan view of a locking clip;

Figure 3 is a longitudinal section through a third embodiment of a connec tion, in which the connection to the housing is made in the axial direction.

Figure 4 is a partial view of a longitudinal section of an end portion of a third embodiment of a connecting hose, in which the outer surface of the end portion of the corrugated tube is additionally held by a sprayed-on, outer locking ring.

Figure 5 is a longitudinal section through a fourth embodiment of a connec tion, in which a non-return valve is arranged at its inner end.

Figure 6 is a longitudinal section through a fifth embodiment of a connec tion, in which a pressure valve is provided at its inner end.

Fig. 7 is a longitudinal section through a sixth embodiment of a connec tion, in which a filter disk is fastened at its inner end.

FIGS. 1a and 1b show a device 1 for releasably connecting a connection hose 2, each with one component, for example, a Ge housing 4 of a fuel tank 5 and a filler pipe not shown, which is attached to a body of a motor vehicle. For simpler presen- tation, only one connection point between the connecting hose 2 and the housing 4 is shown in FIGS . 1a and 1b. The connection of the connec tion hose 2 with the housing 4 takes place via a connecting piece 3 , which is fixed in an opening 6 of the housing 4 .

The connecting hose 2 in the embodiment shown consists of at least one flexible corrugated tube 7 , at one end 8 of which a cylindrical section 9 is formed. This cylindrical section 9 is used for connection to one end 10 of a cylindrical bushing 11 . The connection can, as shown in Fig. 1a, take place in that the end 8 of the corrugated tube 7 is inserted into the end 10 of the socket 11 , so that the inner surface 12 at the end 10 of the socket 11 with the outer surface 13 of the End 8 of the corrugated tube 7 is tightly connected ver. In another embodiment, the connection takes place in reverse, as is shown for example in FIG. 4.

On the outer surface 14 of the socket 11 is a protruding, around the circumferential surface of the socket 11 in a transverse plane of the socket 11 bulge 15 ausgebil det, which is used for locking with a formed in the connecting piece 3 ring-shaped recess 16 .

The connecting piece 3 shown in FIG. 1b has an outer ring 17 , the outer circumferential surface 18 of which is tightly connected to the opposite surface 19 of the opening 6 . The inner lateral surface 20 of the ring 17 is tightly connected to an upper, outer lateral section 21 of a rotationally symmetrical sleeve 22 . A locking ring 23 is mounted in the sleeve 22 . The hedging ring 23 has a radially outwardly projecting annular collar 24 . The collar 24 springs when inserting the locking ring 23 from the lower end 25 in the direction of the upper end 26 of the sleeve 22 when a conically narrowing section 27 of the locking ring 23 is applied to a conically narrowing section 28 of the sleeve 22 from a compressed position outwards over the upper end 26 of the sleeve 22 . In the extended state, the collar 24 rests with an annular surface 29 pointing downward on an end surface 30 of the upper end 26 of the sleeve 22 .

So that the collar 24 of the locking ring 23 is radially compressible and can spring outwards, the locking ring 23 is provided with at least one axially extending slot 31 . In the embodiment shown in FIG. 1b, the locking ring 23 has four slots 31 a, b, c and d offset by 90 ° to one another.

Above the conically narrowing section 27 and below the collar 24, and below the conically narrowing section 27 and above a lower collar 32, there is play or clearance 33 required for assembly between an outer surface 34 of the securing ring 23 and the corresponding inner surface 35 of the sleeve 22 trained.

At least one sealing ring 37 is provided on a lower annular end face 36 of the securing ring 23 . In the embodiment shown in Fig. 1b embodiment, two configured as O-rings seal rings 37 a and b are mounted 37. A spacer 38 can be arranged between the two sealing rings.

Below the sealing ring 37 there is a releasable stop 39 , which in the embodiment of FIG. 1b is designed as a press-in ring 40 . In the present embodiment, the press-in ring 40 has an outer bead 41 , which engages in an indentation 42 formed in the inner surface 35 of the sleeve 22 during assembly. In another embodiment, the locking of the stop 39 , 40 takes place in the reverse configuration.

As a plastic for the corrugated tube 7 , a thermoplastic or the like Chen is preferably used. The associated socket 11 is preferably made of polyamide (PA) or the like. The housing 4 and the ring 17 are preferably made of polyethylene (PE) or the like, while polyamide (PA) or the like is preferably used for the sleeve 22 . The locking ring 23 is preferably made of polyethylene (PE) or the like. The sealing rings 37 a and 37 b consist of NBR or Viton. The stop 39 or press ring 40 is preferably made of polyamide (PA) or the like.

FIGS. 2a, 2b and 2c a further apparatus 1 'in which the positive connection between the connecting tube 2' and the Verbin dung clip show 3 'via a in FIG. Retaining clip 43 shown 2c. The locking of the connector tube 2 'with the connecting piece 3' is carried out in the engaged state of the connector tube 2 'in Verbin dung clip 3', that is, when the connecting hose 2 is inserted 'up to a at the socket 11' formed stop 44 in the connecting piece 3 ' .

Furthermore, a marking or a guide on the connecting hose 2 'and on the connecting piece 3 ' can be provided to facilitate assembly. The in the wall 46 of the socket 11 'and in the wall 47 of the sleeve 22 ' trained th grooves or recesses 48 a and 48 b and 49 a and 49 b are aligned with each other in the engaged state. Longitudinal arms 52 , 53 of securing clip 43 are pushed through locking channels 50 and 51 thereby forming. When a stop or cross arm 54 is reached, the front ends 55 and 56 of the longitudinal arms 52 , 53 spring together. The front ends each have a narrowing section 57 , 58 , so that the safety clip 43 is prevented from falling out.

In Fig. 3, a further connecting piece 3 '' is shown, in which on the jacket surface 59 '' of the rotationally symmetrical sleeve 22 '' is a radially outwardly extending, in a transverse plane of the sleeve 22 '' arranged ring 60 is formed . The ring 60 has an axially downward, ie in the direction of the housing 4 '' pointing end face 61 , on which the ring 17 '' is fixed with its end face 62 . The opposite end face 63 of the ring 17 '' is connected to the Ge housing 4 '' cohesively.

In contrast to this, in the embodiments of FIGS. 1b and 2b, the connection between the sleeve 22 , 22 'via the ring 17 , 17 ' with the housing 4 , 4 'takes place essentially in the radial direction with respect to the longitudinal axis 64 .

To increase the integral connection between the sleeve 22 , 22 'and the ring 17 , 17 ' are on the outer surface 59 , 21 ; 59 'of the sleeve 22 , 22 ' formed radially outwardly, circumferential annular webs 65 , 66 . In the resulting space 67 , 67 'a correspondingly trained section 68 , 68 ' of the ring 17 , 17 'is fitted.

The connection between the ring 17 , 17 'and the housing 4 , 4 ' takes place in addition to the integral connection additionally by a positive connection, as is accordingly on the opposite side on the webs 65 , 65 ', 66 , 66 ' is the case. For this purpose, the ring 17 , 17 'has, for example, a rectangular recess 69 , into which a corresponding shoulder 70 , 70 ' of the housing 4 is fitted.

Fig. 4 shows an embodiment of a connecting hose 2 '', in which the attachment of the end 8 '' of the corrugated tube 7 '' with the end 10 '' of the cylindrical sleeve 11 '''via an additionally sprayed on circlip 71 . Deviating from the connection shown in Fig. 1a, the upper end 10 '' of the socket 11 '' instead of an inner paragraph 72 an outer paragraph 73 . As a result, the outer surface 74 of the paragraph 73 comes into contact with the inner surface 75 of the cylindrical portion 9 '' of the corrugated tube 7 ''. In the assembled state of the socket 11 '' with the cylindrical portion 9 '' of the corrugated tube 7 '', the locking ring 71 is sprayed on. Polyamide (PA) or the like is preferably used as the material for the locking ring 71 . This method is used in particular when there is an incompatibility between the materials. Instead of a plug-in process between the cylindrical section 9 , 9 '' and the cylindrical bushing 11 , 11 '', the connection between these two parts can also be made via a spraying process. For this purpose, a mandrel can be inserted into the cylindrical section 9 in the embodiment of FIG. 1a, onto which the cylindrical bushing 11 is sprayed with the bead 15 .

In Figs. 5, 6, 7 are schematic representations are shown of connecting pieces 3, where the additional members 76, 77, 79 are integrated.

In the embodiment of FIG. 5, a non-return valve 76 is pivotably arranged at the lower end 25 of the sleeve 22 . This check valve 76 prevents fluid from flowing out or flowing out of the housing 4 .

On the connecting piece 3 of FIG. 6, a valve 77 , for example a pressure relief valve 78 , is integrated.

In the embodiment of FIG. 7, a filter 79 is arranged at the lower end 25 of the sleeve 22 .

Claims (15)

1. Device for releasably connecting the ends of a connecting hose with a plastic component each, the device consisting of plastic and a fluid being able to be passed through the device and the connecting hose, characterized in that at least at one end ( 8 , 8 ' , 8 '') of the connecting hose ( 2 , 2 ', 2 '') a cylindrical socket ( 11 , 11 ', 11 '') is arranged, which means ( 15 , 48 , 48 a, 48 b) for releasable locking tion with a matching connecting piece ( 3 , 3 ', 3 '') is provided that the connecting piece ( 3 , 3 ', 3 '') means ( 16 , 49 , 49 a, 49 b) for releasable locking with the connecting hose ( 2 , 2 ', 2 '') which are arranged in a sleeve ( 22 , 22 ', 22 '') made of a rigid plastic or ausgebil det that the sleeve ( 22 , 22 ', 22 '') on the outer surface ( 21 , 61 ) with a ring ( 17 , 17 ', 17 '') from one m less rigid plastic is provided, which is weldable with the connecting piece ( 3 , 3 ', 3 '') surrounding component ( 4 , 4 ', 4 ''). 2. Apparatus according to claim 1, characterized in that the sleeve ( 22 , 22 ', 22 '') is an injection molded part to which the ring ( 17 , 17 ', 17 '') is injection molded. 3. Device according to claims 1 or 2, characterized in that in the sleeve ( 22 , 22 ', 22 '') sealing means are arranged. 4. Device according to one or more of the preceding claims, characterized in that the connection between the sleeve ( 22 , 22 ', 22 ''), the ring ( 17 , 17 ', 17 '') and the component ( 4 , 4th ', 4 '') and between the socket ( 11 , 11 ', 11 '') and a corrugated tube ( 7 , 7 ', 7 '') is integrally and may be positively. 5. The device according to one or more of the preceding claims, characterized in that the socket ( 11 , 11 ', 11 '') made of polyamide or the like and the corrugated tube ( 7 , 7 ', 7 '') consists of polyethylene or the like. 6. The device according to one or more of the preceding claims, characterized in that the sleeve ( 22 , 22 ', 22 '') made of polyamide or the like, the associated ring ( 17 , 17 ') and the component thus welded ver ( 4th ) consist of polyethylene or the like. 7. The device according to one or more of the preceding claims, characterized in that the means ( 15 , 16 , 23 ) for locking the parts to be connected, ie the connecting hose ( 2 ) with the connec tion spigot ( 3 ), in the coupled state from one on the one part ( 2 ) formed bead ( 15 ) and a matching recess ( 16 ) on the other part ( 3 ) and a locking ring ( 23 ), whereby by means ( 15 , 16 ) an axial displacement on the inside of the component ( 4 ) and on the locking ring ( 23 ) preventing axial displacement to the outside. 8. The device according to claim 7, characterized in that the locking ring ( 23 ) is a cylindrical bushing with at least one axially extending slot ( 31 ) and a trained at the upper end, in the radial direction he extending collar ( 24 ), wherein the circlip ( 23 ) over the existing number of slots ( 31 ) is resiliently compressible and the collar ( 24 ) springs to the outside when it reaches a stop position ( 27 , 28 ) at the upper end ( 26 ) of the sleeve ( 22 ). 9. The device according to one or more of the preceding claims 1 to 6, characterized in that the means ( 48 , 49 , 43 ) for locking the parts to be connected, ie the connecting hose ( 2 ') with the connec tion spigot ( 3 ') in the coupled state of the two parts ( 2 ', 3 ') aligned grooves ( 48 , 49 ) and from a inserted into the grooves securing clip ( 43 ). 10. The device according to claim 9, characterized in that the securing clip ( 43 ) is U-shaped with substantially parallel to one another extending longitudinal arms ( 52 , 53 ) and one of the longitudinal arms ( 52 , 53 ) connecting cross arm ( 54 ). 11. The device according to one or more of the preceding claims, characterized in that the sealing means is at least one in the sleeve ( 22 , 22 ', 22 '') arranged sealing ring ( 37 ), the location of which by impact means ( 23 , 39 ) in axial direction is set. 12. The device according to one or more of the preceding claims, characterized in that the connection between the sleeve ( 22 , 22 '; 22 '') and the ring ( 17 , 17 '; 17 '') and the component ( 4 , 4th '; 4 '') either in ra dialer direction or in the axial direction. 13. The device according to one or more of the preceding claims, characterized in that in the connection between the corrugated tube ( 7 '') and the socket ( 11 '') an additional locking ring ( 71 ) is applied so that at least at the circumferential joint ( 80 ) Between the section ( 9 '') of the corrugated tube ( 7 '') and the upper end ( 10 '') of the socket ( 11 '') a joint ( 80 ) covering area is created. 14. The device according to one or more of the preceding claims, characterized in that on the connecting piece ( 3 ) additional building parts ( 76 , 77 , 79 ) are attached or integrated. 15. The apparatus according to claim 12, characterized in that these additional components are a pivotable check valve ( 76 ), a valve ( 77 ) and / or a filter ( 79 ).