Contact strip

 

(57) Abstract:

The invention relates to electrical engineering, in particular to the contact strips plug-in pads. In the proposed contact strip plug-in pads are connected with the possibility of floating movement in the horizontal and vertical directions, for example, respectively to the middle part of the base mounting holes of the contact strips so that the compensated displacement occurring between the first and second electrically conductive contact elements and prevents povrezhdeniya. The performance of the contact strips are particularly suitable for joint electrical contact electrically actuated fuel valve nozzles. 2 C. and 10 C.p. f-crystals, 6 ill.

The invention relates to a contact plate.

A device with the characteristics of PP. 1 and 2, in which the fuel valve nozzles installed in a separate mounting hole of the fuel distributor and together electrically in contact through the contact strips. A number of plug-in pads, quantity corresponding to the number of the fuel valve nozzles, which are the first electrically conductive contact elements connected to vtotal in the fuel dispenser, the socket connector pads in the contact plate and fixed in the connector pads of the first electrically conductive contact elements and the second conductive contact elements of the fuel valve nozzles have the tolerance for deviation from the form and location, a connection contact of the strap with the fuel valve nozzles is offset between the second electrically conductive contact elements of the fuel valve nozzles and the first electrically conductive contact elements of the connector pads located in the contact strip. If the contact strip, the fuel distributor and plug the pads are made of synthetic material, it is necessary to take into account large due to technological tolerances for deviation from the form and location. Then during installation, there is a danger of deformation and damage of the first electrically conductive contact elements and the second conductive contact elements and/or the contact strips, plug-in pads and/or fuel valve nozzles. Thus in this case does not provide the reliability of the known device in operation after connecting the fuel valve nozzles and contact strips. In addition, see doprovodnymi contact elements of the contact strips lead to large Assembly required effort between the contact elements.

On the contrary, corresponds to the invention of the contact strip to the distinctive features of p. formula 1 of the invention has the advantage that the plug-in pads mounted with the possibility of floating movement of the contact strip in the horizontal and vertical directions, make possible a compensation of tolerances for deviation from the shape and position between cooperating contact electrically-driven units and the contact strip. Thus, connector pads, still moving after installation in the contact strip can be aligned in accordance with the position of the second electrically conductive contact elements electrically excited machines.

As a consequence, it turns out the connection contact of the strap with connector pads with electrically-driven units with less deformation and Assembly effort between the first electrically conductive contact elements of the contact strips and the second conductive contact elements, so that effectively prevents damage during Assembly and also the contact plate or electrically excited machines.

The device characteristics of p. 2 claims Plevna the dispenser, with the advantages already mentioned above with reference paragraph 1 of the claims. Bias resulting from tolerances for deviations from the form and location, through mounting holes fuels its valve between the fuel valve nozzles, first and second electrically conductive contact elements and plug-in pads are compensated through connector blocks mounted with the possibility of floating movement of the contact melting in the horizontal and vertical directions.

Thanks to the measures listed in paragraphs. the claims that are dependent with respect to p. 1, respectively p. 2 claims, possible preferred advanced options and improve the contact strips specified in paras.1 and 2 claims.

For the execution of the plug-in pads installed with the possibility of floating movement of the contact melting in the horizontal and vertical directions, it is preferable to mount the contact strip retaining element, which passes through a through hole connector pads with radial clearance and axial gap and head limits the axial mobility is REGO housing and the contact strips is primary, if the connector block on the middle part of the base, is made to install the plug-in pads mounting holes of the contact strips, is held by a holding element fixed in the housing bore of the middle part of the base.

However, the preferred compound is also obtained if the connector block is inserted into made to install the plug-in pad mounting pin hole of the strap and connected by means of the locking-latch connection with the contact strip.

Particularly preferably, if the plug block is executed at least one positioning protrusion, which establishes the position of the unit, respectively, the fuel valve nozzles, relative to the plug strip that goes from the periphery of the connector pads in the axial direction of the installation hole and communicates with at least one recess located on the unit, respectively, of the fuel valve in the nozzle, so it's easy and precise positioning of the unit, respectively, the fuel valve of the injector relative to the connector block. Because of this effectively prevents the deformation or povidoneiodine fuel valve nozzles.

However, for easy and accurate positioning of the unit, respectively, the fuel valve of the injector relative to the connector block also preferably, if the plug block is executed at least one recess, which communicates with at least one positioning protrusion preferowanym to Assembly, respectively, of the fuel valve in the nozzle.

Asymmetric relative to the longitudinal axis of the contact strips execution of the at least two positioning protrusions and at least two notches in the aggregate, respectively, of the fuel valve in the nozzle, has the advantage that when connecting the first electrically conductive contact elements of the plug-in pads with the second electrically conductive contact elements of the Assembly, respectively, of the fuel valve nozzles, they allow only one positioning unit, respectively, the fuel valve of the injector relative to the connector block, and thereby serves as protection against rotation poles for electrical contacting.

Reasons, economical of manufacture and preferably electrically insulated contact bar starts on the deviation from the shape and layout occur when using synthetic materials, can be compensated by using a plug-in pads that are installed with the possibility of horizontal and vertical movement. When the fixed location of the plug-in pads, as described in the posted application Germany N 3730571, it is impossible to compensate for the resulting large tolerances, so that the use of the contact strips made of synthetic material, is problematic.

Particularly preferably, if the first conductive contact elements mounted in the plug holes, plug-in pads by fixing through the clasping projections made on the first electrically conductive contact elements, so it's easy to carry and reliable connection between the first electrically conductive contact elements and the connector.

In order to fix the position of the electric wire is held in contact strip made of synthetic material, and electrically connected to the first electrically conductive contact elements, preferably, if the electrical wire is connected to the contact strip.

Especially predpochtitelen contact strips connected by ultrasonic welding with contact strip, so it's just ongoing and reliable connection between the electrical wire and the contact strip.

To perform a compact and causing small production costs corresponding to the invention of the system of injection of fuel is preferred if the fuel dispenser to a certain extent integrated in the intake manifold or the cylinder head of an internal combustion engine, so there you have the required fuel lines and holes for valve mounting.

In Fig.1 and 2 is shown made in accordance with the invention, the contact strip; 3 - mount plug-in contact pads on the interposer according to the section III-III in Fig.2; Fig.4 and 5 the upper part of the housing of the fuel valve nozzle connected to the connector; Fig.6 - fuel dispenser located in it the fuel valve nozzles, which together electrically probing using the contact strips.

Contact strip 1 for the joint electrical contact several electrically induced aggregates of an internal combustion engine is made e.g. of synthetic material. In the contact strip 1, are located the electrical contact. For this purpose the contact strip 1 for each plug-in pads 2 provided for mounting the housing bore 3, open to the contact strip 4. In the plug block 2 made of electrically insulating material, are first electrically conductive contact elements 5, which are electrically connected to electric wires 6, located in the contact strip 1. Electric wire 6 can, for example, be made ribbon. Each electric wire 6 is connected to the contact strip 1, for example, by means located between each mounting hole 3 reference 7 contact strips 1, and each of the supporting seat 7 is formed by saccarine material of the contact strips by means of ultrasonic welding.

For example, at one end in the longitudinal direction of the contact strip 1, in addition, is plug-in connector 10, which are connected to separate electric wires 6 and through which can be entered from the electronic control device of known construction (not shown) of the electric control signals for electrically excited machines. Thus, all the electric wires 6 are from preceeding first electrically conductive contact elements 5. Of the end surface 4 of the strap are at some axial distance from one another two rails console 11, which preferably preformative in the manufacture of contact of the strap 1. For connecting the contact strips 1, for example, with the fuel distributor, intake pipeline or cylinder head of the internal combustion engine in contact placket presented as an example of the execution, during the manufacture of the molded mounting bushings 13 and 14, which are open at least on the side facing the end surface of the strap 4. The mounting sleeve 13 and 14 made for example of metal. The mounting sleeve 13 has a blind hole 17 with internal thread 18, while in both sides of the open mounting sleeve 14 in combination with concentric with respect to the standoffs 14 holes 15 of the contact strips 1 form mounting holes 16 in the contact strip 1.

In Fig.3 in greatly enlarged scale shows an example corresponding to the invention of the plug connection pads 2, made for example of synthetic material, and the contact strips 1 made of synthetic material. Stepped retaining element 19, which is the highest diameter, than the diameter of the head 20 and a top 22 having a smaller diameter than the diameter of the middle part 21, is directed upward, is made concentric with respect to the longitudinal axis 25 of the plug connector pads, the through hole 26 of the connector pads 2 and its top 22 is inserted in the transmitted concentric to the longitudinal axis 27 of the socket mounting holes 3 of the contact strips 1, blind hole 28 of the middle part 29 of the base mounting holes 3 in the above example, the execution by means of ultrasonic welding so connected with a blind hole 28, that the retaining element 19 of the first flange 31 of the element middle region 21 adjacent in the axial direction to the end surface 32 of the middle part 29 of the base. The middle part 29 of the base supports in the axial direction relative to the base 35 of the mounting holes 3 of the contact strips 1 and has, for example, the annular surface of the cross-section.

To connect the plug with the contact pads 2 of the strap 1 is also possible that the top 22 of the retaining element 19 on its periphery was threaded and driving themselves also in threaded blind hole 28 of the middle part 29 of the base.

In the axial direction of the surface 37 of the secondary constriction 38 of the cross-section of the stepped through hole 26 is provided an axial gap 39, so plug the pad 2 can be moved with a clearance in the axial direction, respectively, a vertical direction relative to the holding element 19, which is connected with the contact plate 1, and thereby with respect to the contact strip 1. The axial gap 34 existing between the flange 33 formed on the transition from narrowing 38 cross-sectional area 41 of the through hole 26, and the middle part 29 of the base is greater than the axial gap 39. This axial gap 39 is limited by the fit turned from the head 20 of the retaining element 19 plug end surface 40 of the connector pads 2 to the base 35.

In the radial direction between the stepped through hole 26, it turned from the Foundation of the 35 region 41 and the periphery of the annular middle part 29 of the base includes a gap 42. In addition, there is a radial gap 43 between the constriction 38 cross-section and the average area 21, and the radial gap 44 between the head 20 and surrounding the cylinder 20 by region 45 through holes 26. Consequently, the connector block 2 can freely move in the radial, respectively, the horizontal direction relative to the holding element 19 and thus also the ratio is between the connector 2 and the contact plate 1, to ensure that corresponds to the invention of horizontal and vertical mobility connector pads 2 with respect to the contact strip 1.

In the example of execution shown in Fig.2 and 3, to the end, turned from the plug end surface 40 of the connector pads 2, preferovany four positioning protrusions 47, having a polygonal cross-sectional shape, which are located at some distance from one another so that the two positioning protrusions 47 are on the same side of the longitudinal axis 46 of the strap, namely symmetrical with respect to the line III-III, which passes through the first electrically conductive contact elements 5. Positioning protrusions 47 are, for example, rectangular in shape and have a in the longitudinal direction of the contact strips 1 parallel to the surface 75 and located perpendicular thereto parallel to the surface 76. However, the positioning projections 47 can be made rounded.

At the plug block 2 connecting crosspiece 48, which connects the two positioning protrusions 47 located on the side of the longitudinal axis 46 of the strap, on their end, turned from the longitudinal axis 46 of the strap, so that they both surfaces 76 are blockrate at the end of the connector pads. Thus with respect to the longitudinal axis 46 of the contact strips 1 surface 76 and thereby positioning protrusions 47 are made asymmetrically to each other on different sides of the longitudinal axis 46 of the strap. Similarly, the surface 46 of the positioning protrusions 47 could be located so that they would be on one side of the longitudinal axis 46 of the strap shorter period in relation to each other, than on the other side.

It is also possible for the end, turned from the plug end surface 40 of the plug block 2, to perform the excavation, which interact with the positioning protrusions made on the housing of the electromagnetic-induced aggregation. For asymmetric runtime plug-in pads 2 with respect to the longitudinal axis 46 of the contact strips 1 these notches serve different by giving them different geometric dimensions. Positioning the tabs on the chassis is electrically excited by a unit connected to the connector, in this case made so that they can be entered in these notches.

The connector block 2 has, for example, two open in both sides of the stepped plug holes 49 in which, by fixing the fixed one is the R on the first electrically conductive contact element 5.

In Fig. 4 and 5 as an example for electrically excited by a unit of the internal combustion engine presents the upper part 52 of the housing of the fuel valve nozzle 53. The upper part 52 of the housing has, for example, two second electrically conductive contact element 54, which may be electrically connected with the first electrically conductive contact elements 5 plug-in pads 2. For positioning protrusions 47 plug-in pads 2 on the upper part 52 of the housing of the fuel valve nozzle 53 is made of the recess 55, which can interact positioning protrusions 47. In accordance with asymmetrically performed with respect to the longitudinal axis 46 of the contact strips 1 positioning protrusions 47 in combination with a connecting crosspiece 48 requires that the notches 55 on the upper part 52 of the body were also made asymmetric with respect to a line perpendicular to the connecting line 57 both electrically conductive contact elements 54. As a consequence, the notches 55 should have the space for installation of the positioning projections 47 and connecting jumpers 48. Thus, we obtain, for example, two tabs 80 and 81, which surround the contact elements 54 and are located on the connection is lapanday nozzle and located at such distance from each other, the tabs 80 and 81 of the fuel valve nozzle 53 can be inserted between the positioning projections 47 plug-in pads 2. With this purpose, also parallel to the surface 82 of the protrusion 80 is made in the direction of the connecting line 57 is shorter than parallel to the surface 82 of the protrusion 81 in this direction, so that the tabs 80 and 81 are made asymmetrically relative to the axis 56 of the fuel valve nozzles.

The execution of the plug-in pads 2, due to the connecting strap 48 and asymmetric relative to the longitudinal axis 46 of the strap, as well as the performance of the upper part 52 of the casing ensures effective protection against reversal of the poles for the fuel valve nozzles 53, so that the fuel valve nozzle 53 may not be connected to the connector 2 being rotated 180about.

Describes and presents a variant of the upper part 52 of the housing of the fuel valve nozzles 53 may be, for example, achieved by at least partial facing nozzle synthetic material by extrusion.

Instead of the flat contact elements shown in the drawings, it is also possible to provide circular or otherwise made pin is Opredelitel, described in the posted application Germany N 3730571, stepped holes 61 which are used to install injectors and performed at some distance from each other, is located on one of the fuel valve in the nozzle 53, which is surrounded by a hole 61 for mounting the nozzle, which is open at both ends. Fuel valve nozzle 53 is connected at least with one fuel line going into the fuel distributor 60. Supply and discharge of fuel in the fuel dispenser 60 and respectively from the fuel dispenser 60 is, for example, by means of two connecting fittings 63 and 64 of the fuel dispenser 60. The system pressure of the fuel in the fuel dispenser 60 in a known manner handle with knob 65 pressure, located in the fuel dispenser 60. Contact strip 1 so connected with the fuel valve 60 that it overlap the holes 61 to install the injectors and fuel valve nozzles 53 in her hold. Rails console 11 of the contact strips 1 are used to facilitate mounting of the contact strips 1 and the fuel dispenser 60 and communicate with the mounting holes 66 of the fuel dispenser 60. Concentric to the mounting barely 60 is made open at both sides of the mounting holes 67, for example, by means of the fastening bushing 68, located in the fuel dispenser 60. Using these holes, passing through the fuel dispenser 60, and through the contact bar 1, item consisting of a fuel dispenser 60 and the contact strips 1 may be jointly secured to the intake manifold and the cylinder head of the internal combustion engine. For pre-Assembly of the fuel dispenser 60 and the contact strips 1, as shown in the example of execution, concentric to having a female thread 18 deaf hole 17 of the mounting sleeve 13 in the fuel dispenser 60 is a through hole 71, for example, by means of the fastening sleeve 72. On the one who turns away from the contact strips 1 end side of the fixing sleeve 72 is the head of the bolt 73 which is screwed into the internal thread 18 of the blind hole 17 of the contact strips 1 and thus connects together the contact bar 1 and the fuel dispenser 60.

The fuel pin nozzle 53, located in the fuel dispenser 60 may inject the fuel, for example, directly into the cylinder of the internal combustion engine or the intake pipe of the internal combustion engine.

Offer contact strip 1 makes possible the mobility plug-in pads 2 with respect to the contact strip 1 in both the horizontal and vertical directions. Thus, you can compensate for tolerances on the deviation of the shape and location between the first electrically conductive contact elements 5 plug-in pads 2 and the second electrically conductive contact elements 54, for example, the fuel valve nozzles 53. However, the proposed contact strip 1 is also suitable for contact with other electrically induced aggregates, such as spark ignition internal combustion engine with forced ignition or glow plug snowspeeders internal combustion engine.

1. CONTACT strip for joint electrical contact several electrically induced aggregates of internal combustion engines, in particular fuel valve nozzles, with reserye can be connected by inserting with the second electrically conductive contact elements of each unit, characterized in that each connector block is in contact with the melt so that it can float to move in horizontal and vertical directions with respect to the contact strip.

2. Contact strip for joint electrical contact several electromagnetic conducted in the action of the fuel valve nozzles of internal combustion engines located in her plug-in blocks, which are the first electrically conductive contact elements which can be connected by inserting with the second electrically conductive contact elements each fuel valve nozzle, and the fuel valve nozzles are made at some distance from each other, the stepped holes for installing the fuel injectors distributor and each installation hole around one of the fuel valve in the nozzle is open at both ends and connected with at least one fuel line that goes in the fuel dispenser, with which the contact strip is connected so that the mounting holes overlap, and the fuel valve nozzle in her hold, otlichayetsa in horizontal and vertical directions with respect to the contact strip.

3. Strap under item 1 or 2, characterized in that the contact strip fixed retaining element with a head that passes through the through hole in the plug block with radial clearance and axial gap and its head limits the axial mobility of the plug-in pads with respect to the contact strip.

4. Strap on p. 2, characterized in that the connector block is held on the middle part of the base, is made to install the plug-in pads mounting holes contact of the strap through the locking element is fixed in the housing bore of the middle part of the base.

5. Strap according to any one of paragraphs.1-3, characterized in that the connector block is inserted into made to install the plug-in pad mounting pin hole of the strap and connected by means of the locking-latch connection with the contact strip.

6. Strap according to any one of paragraphs.1-5, characterized in that the plug block is executed at least one positioning protrusion, which establishes the position of the unit, in particular the fuel valve nozzle relative to the plug strip that goes from the periphery of the plug housing in the axial direction and mutual is sunke.

7. Strap according to any one of paragraphs.1-5, characterized in that the plug block is executed at least one recess, which communicates with at least one positioning protrusion, which is made with the second electrically conductive contact elements in Assembly, in particular on the fuel valve to the nozzle.

8. Strap on p. 6 or 7, characterized in that the positioning unit, respectively, the fuel valve nozzle and connector pads are provided at least two positioning protrusions and at least two notches which are made asymmetrically relative to the longitudinal axis of the contact strips.

9. Strap according to any one of paragraphs.1-8, characterized in that the first electrically conductive contact elements are fixed by fixing the plug in the plug holes of the pad, with clamping flange, made on the first electrode contact elements.

10. Strap according to any one of paragraphs.1-9, characterized in that the contact strip made of synthetic material.

11. Strap on p. 10 characterized in that the electric wire is held in contact interposer and electrically connected with the first conductive contactlast fact, the electric wire is connected with the contact plate in at least one reference location contact strips by saccarine by means of ultrasonic welding.

 

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