JP5707537B2 - Plug-in connection device - Google Patents

Description

  The present invention relates to a plug-in connection device for a conduit guiding a medium. In particular, the invention relates to the field of plug-in connections for hydraulic lines for fuel injectors.

  According to Patent Document 1, a plug-in connection device for a conduit for guiding a medium is known. This known plug-and-connect device is suitable for fixing in an opening of an injector body of a fuel injector. This plug-in connection device has a plug, which is formed on at least one locking member and has at least one connecting tube piece. The locking member is fixed in the opening at the locking position of the fixing clip slidably accommodated in the insertion body.

  In the plug-in connection device known from Patent Document 1, the fixing clip is moved behind the locking member after assembling the plug-in body to the counter member for fixing. As a result, the locking member is prevented from returning by spring force, and thus the plug-in connection device is prevented from being released from the counter member during operation. Therefore, assembly and fixing are performed in two stages. In the first stage, the insert is placed over the opposing member. In the second stage, locking of the insert is obtained by locking the fixing clip. At this time, since the fixing clip is operated during the execution of the first stage, there is a problem that the early operation of the second stage is performed even though the first stage has not yet been completed. This has the disadvantage that reliable assembly is not guaranteed in some cases or the assembly costs are correspondingly high.

German Republic Patent Publication No. 102006061952

  On the other hand, the plug-and-connect apparatus having the characteristics described in claim 1 has an advantage that an improvement in the function form is realized. In particular, reliable assembly can be realized at a relatively low cost.

  By means of the dependent claims, preferred embodiments of the plug-in connection device according to claim 1 are possible.

  The plug-in connection device is used for the conduit for guiding the medium, in particular for the hydraulic conduit of the fuel injection device. This insertion connecting device has an insertion body provided with a locking member, and a fixing clip that can move to a locking position relative to the insertion body, and the fixing clip locks the locking member into the locking position. Secure to. In addition, a holding blade for a fixing clip is provided. These holding blades hold the fixed clip in the fixed position so that the fixed clip does not move to the locked position.

  Preferably, a securing clip is movable along the longitudinal axis of the insert, and the retaining blades expand at least generally perpendicular to the longitudinal line to release the securing clip from the secured position. It can be opened. Preferably, further, a releasable locking connection is formed between the fixing clip and the holding blade. This locking connection can be released, for example, by widening the retaining blade, thereby moving the fixing clip to the locked position.

  In order to form a locking connection, the retaining blade has a locking projection, which engages with a locking projection provided on the fixing clip from behind (hindergreifen). Preferably, further, the retaining blade has an end section facing the locking member of the plug. Depending on the length of the end section, the holding blades can be automatically expanded during assembly or the holding blades can be expanded by the assembly device.

  Preferably, the holding clip may have an operation member on the end side. From this operating member, an assembly force can first be applied to the insert via the fixing clip, whereby the insert is fitted into the counter member. Then, the released fixing clip can be operated via the operating member. This simplifies the assembly of the plug connection device.

  More preferably, the locking member is configured as a locking hook. The locking hook is configured to be spring-elastic, and locks into an appropriate notch of the opposing member, for example, when the insertion body is fitted.

  Preferably, further, the holding blade is connected to the insert or the holding blade is formed on the insert. This provides a compact configuration. In particular, a configuration divided into two is realized.

  Preferably, further holding blades are provided which are arranged facing the holding blades relative to the longitudinal axis of the plug, the holding blades and the other holding blades holding the fixing clip to the locked position. Fix in place against movement. As a result, the force can be uniformly transmitted from the fixed clip first fixed to the insertion body. Moreover, in order to operate the holding blade, a suitable force transmission is possible, for example by spreading it out on both sides, so that, for example, radial loads on the plug or the fixing clip are avoided. Thus, preferably, each retaining blade is also bendable radially outward to release the securing clip.

  Advantageous embodiments of the invention are explained in more detail below with the aid of the accompanying drawings, in which corresponding parts have the same reference numerals.

FIG. 3 is a schematic cross-sectional view during assembly of the plug-in connection device having a counter member according to the first embodiment. FIG. 2 is a view during assembly of the plug-in connection device having the counter member shown in FIG. 1. It is a figure in the state in which the plug-in connection apparatus which has an opposing member shown in FIG. 1 was assembled. FIG. 6 is a diagram during assembly of the plug-in connection device having the counter member shown in FIG. 2 according to the second embodiment.

  FIG. 1 is a schematic cross-sectional view during assembly of a bayonet connection device 1 having a counter member 2 according to a first embodiment of the present invention. The plug-in connection device 1 has a vertical axis 3, which is aligned with the vertical axis 3 of the hole 4 of the counter member 2 when the plug-in device 1 is inserted into the counter member 2. It has become. At this time, the plug-in connection device 1 is fitted into the hole 4 in the joining direction 5 along the longitudinal axis 3. The fitting is performed in a plurality of steps described in FIGS.

  The plug connection device 1 shown in FIG. 1 has a plug 6. An axial hole 7 is formed in the insert 6 so that the medium can be guided, for example, from the end 8 of the hole 7 into the hole 4 of the counter member 2 through this hole 7. It has become. However, the medium may be guided from the hole 4 of the counter member 2 to the end 8 of the hole 7. In this case, the end 8 is provided with a connection passage for a connection pipe piece (not shown) perpendicular to the longitudinal axis 3, for example. A seal ring 9 is provided for sealing, and this seal ring 9 is mounted in an annular groove in the region of the end 10 of the insert 6.

  When viewed from the end 10, locking members 15, 16 are provided behind the seal ring 9, and these locking members 15, 16 are spring-elastic locking hooks 15, 16 in this embodiment. It is configured. A contour 17 adapted to the locking hooks 15, 16 is formed in the hole 7. Thereby, in the assembled state shown in FIG. 3, a locking connection is obtained between the locking hooks 15, 16 and the contour 17 of the hole 4 of the counter member 2. Of course, such a locking connection can only withstand a load in a direction opposite to the joining direction 5. This is because the locking hooks 15 and 16 can in principle return again with spring force when subjected to a correspondingly large load.

  The plug-in connection device 1 further includes a fixing clip 18 having an operation member 19. Further, holding blades 20, 21 are provided, and these holding blades 20, 21 are connected to the insertion body 6 or are formed on the insertion body 6. The holding blades 20, 21 have locking projections 22, 23, and these locking projections 22, 23 cooperate with locking projections 24, 25 formed on the operation member 19 to establish a locking connection. Form. As a result, the fixing clip 18 is fixed relative to the insertion body 6 at the fixing position shown in the figure by shape coupling using the holding blades 20, 21. Further, by this, the operation member 19 is pressed in the joining direction 5, and the insertion body 6 can be inserted into the hole 4 of the opposing member 2 in the joining direction 5.

  FIG. 2 shows a state in which the plug-in connection device 1 having the counter member 2 shown in FIG. 1 is being assembled. In FIG. 2, the plug 6 is fitted in the hole 4 of the opposing member 2 as long as the locking hooks 15, 16 are locked to the contour 17 in the opposing member 2. In this position, the end sections 26, 27 come into contact with the upper side 28 of the counter member 2, so that the retaining blades 20, 21 are bent radially outward relative to the longitudinal axis 3. As a result, the locking connection between the locking protrusions 22 and 23 of the holding blades 20 and 21 and the locking protrusions 24 and 25 of the fixing clip 18 is released, and the fixing clip 18 is released. Accordingly, the holding blades 20 and 21 are released by the reaction force acting on the holding blades 20 and 21 generated in the axial direction by the counter member 2.

  Joining of the insert 6 into the hole 4 is facilitated by the cylindrical section 29 of the insert 6. The contour 17 on which the locking hooks 15, 16 are locked may be configured in particular as a groove 17.

  In the position of the fixing clip 18 relative to the insert 6 shown in FIG. 2, the fixing clip 18 is still fixed by the engagement of the locking projection 35 into the recess 36 of the insert 6 for the time being. Yes. Since the holding blades 20 and 21 have already released the fixing clip 18, the locking projection 35 is lifted from the recess 36 by applying a predetermined force to the operation member 19 in the joining direction 5.

  FIG. 3 shows an assembled state of the plug-in connection device 1 having the counter member 2 shown in FIG. When the holding force of the locking projection 35 in the recess 36 is overcome starting from the position shown in FIG. 2, the released fixing clip 18 can be moved to the position shown in FIG. The securing clip 18 is then positioned in the locked position. In the locked position, the fixing clip 18 fixes the locking hooks 15 and 16. This reliably prevents the locking hooks 15 and 16 from returning from the contour 17 by spring force. Therefore, the insert 6 is securely fixed in the hole 4. Next, the locking projection 35 of the fixing clip 18 engages in another recess 37 of the insertion body 6. As a result, the fixing clip 18 is moved behind the locking hooks 15 and 16. The fixing clip 18 is fixed by the locking projection 35 being locked in the recess 37.

  This ensures that the individual steps in joining the plug-in connection device 1 in the hole 4 of the counter member 2 are realized reliably. In particular, since the fixing clip 18 is prevented from being accidentally released, the fixing clip 18 is moved to the locked position only after the locking hooks 15 and 16 are engaged in the contour 17 of the hole 4 of the counter member 2. be able to.

  In this embodiment, the retaining blades 20, 21 can be expanded at least generally perpendicular to the longitudinal axis 3 in order to release the fixing clip 18 from the fixed position.

  FIG. 4 shows the plug-in connection device 1 with the counter member 2 shown in FIG. 2 according to a second embodiment of the invention. In this case, FIG. 4 shows the position during assembly corresponding to FIG. In this embodiment, the end sections 26 and 27 of the holding blades 20 and 21 are configured shorter than in the first embodiment. Accordingly, the locking hooks 15, 16 are already engaged with the contour 17 of the hole 7, even though the end sections 26, 27 are still spaced from the upper side 28. In this embodiment, the release or release of the securing clip 18 is performed by an additional assembly device 38. The assembling apparatus 38 is configured to move the holding blades 20, 21 in the radial direction in order to release the locking connection between the locking projections 22, 23 of the holding blades 20, 21 and the locking projections 24, 25 of the insertion body 6. Bend to 39,40. Then, the fixing clip 18 is moved to the locked position in the joining direction 5. In this case, the lock position corresponds to the position shown in FIG. Of course, in this case, permanent folding of the holding blades 20, 21 or contact with the upper side 28 is avoided. Thereby, in some cases, a force acting on the fixing clip 18 in the direction opposite to the joining direction 5 can be avoided.

  Depending on the configuration, the holes 4, 7 may be part of the conduit 11 guiding the medium.

  The invention is not limited to the embodiments described above.

DESCRIPTION OF SYMBOLS 1 Plug connection apparatus 2 Counter member 3 Longitudinal line 4 Hole 5 Joining direction 6 Insert body 7 Axial hole 8 End of hole 7 9 Seal ring 11 Pipe line 15, 16 Locking member 17 Contour, groove 18 Fixing clip 19 Operation Member 20, 21 Holding blade 22, 23, 24, 25 Locking protrusion 26, 27 End section 28 Upper 29 Cylindrical section 35 Locking protrusion 36, 37 Recess 38 Assembly device 39, 40 Radial direction

Claims (9)

Plug-in connection device (1) for a conduit (11 ) for guiding the medium, the plug-in body (6) provided with at least one locking member (15), and the plug-in body (6) A fixing clip (18) relatively movable to the locking position, and the fixing clip (18) fixes the locking member (15) to the locking position. At least one retaining blade (20, 21) for the clip (18) is provided, the retaining blade (20, 21) being arranged so that the fixed clip (18) does not move to the locked position. In the type of holding the fixed clip (18) in a fixed position,
The holding blade (20, 21) is connected to the insertion body (6) or the holding blade (20, 21) is formed on the insertion body (6), and the fixing clip (18) Removable locking connection is formed between the holding blades (20, 21).   The fixed clip (18) is movable along the longitudinal axis (3) of the plug-in body (6), and the holding blades (20, 21) release the fixed clip (18) from the fixed position. Therefore, the plug-in connection device according to claim 1, characterized in that it can be expanded at least approximately perpendicularly to the longitudinal axis (3).   The holding blade (20, 21) has a locking projection (22, 23), and the locking projection (22, 23) is a locking projection (24, 25) provided on the fixing clip (18). The plug connection device according to claim 1, wherein the plug connection device is engaged from behind.   The holding blade (20, 21) has an end section (26, 27) facing the locking member (15, 16) of the insert (6). The plug-in connection device according to any one of 1 to 3.   The plug-in connection device according to any one of claims 1 to 4, characterized in that the fixing clip (18) has an operating member (19) on the end side.   Plug-in connection device according to any one of claims 1 to 5, characterized in that the locking member (15, 16) is configured as a locking hook (15, 16).   There is another holding vane (21) arranged facing the holding vane (20) in relation to the longitudinal axis (3) of the insert (6), which is separated from the holding vane (20) and the separate 7. The holding blade (21) of claim 1, wherein the fixed clip (18) is held in the fixed position against movement to the locked position. Plug-in connection device as described.   8. Plug-in connection device according to claim 7, characterized in that the holding vanes (20, 21) are each bendable radially outward in order to release the fixing clip (18). 9. Plug-in connection device according to any one of claims 1 to 8, characterized in that the conduit (11) for guiding the medium is a hydraulic conduit for a fuel injection device.

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