WO2016169670A1 - Insert et bielle pour la compression variable d'un moteur à combustion interne - Google Patents

Insert et bielle pour la compression variable d'un moteur à combustion interne Download PDF

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Publication number
WO2016169670A1
WO2016169670A1 PCT/EP2016/053497 EP2016053497W WO2016169670A1 WO 2016169670 A1 WO2016169670 A1 WO 2016169670A1 EP 2016053497 W EP2016053497 W EP 2016053497W WO 2016169670 A1 WO2016169670 A1 WO 2016169670A1
Authority
WO
WIPO (PCT)
Prior art keywords
connecting rod
insert
eccentric lever
eccentric
inserts
Prior art date
Application number
PCT/EP2016/053497
Other languages
German (de)
English (en)
Inventor
Stefanie Hutzelmann
Alexander MUDRA
Dietmar Schulze
Original Assignee
Hilite Germany Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hilite Germany Gmbh filed Critical Hilite Germany Gmbh
Publication of WO2016169670A1 publication Critical patent/WO2016169670A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C11/00—Pivots; Pivotal connections
    • F16C11/04—Pivotal connections
    • F16C11/06—Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints
    • F16C11/0685—Manufacture of ball-joints and parts thereof, e.g. assembly of ball-joints
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/04—Engines with variable distances between pistons at top dead-centre positions and cylinder heads
    • F02B75/045—Engines with variable distances between pistons at top dead-centre positions and cylinder heads by means of a variable connecting rod length
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C23/00—Bearings for exclusively rotary movement adjustable for aligning or positioning
    • F16C23/10—Bearings, parts of which are eccentrically adjustable with respect to each other
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C7/00—Connecting-rods or like links pivoted at both ends; Construction of connecting-rod heads
    • F16C7/06—Adjustable connecting-rods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C11/00—Pivots; Pivotal connections
    • F16C11/04—Pivotal connections
    • F16C11/06—Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints
    • F16C11/0619—Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints the female part comprising a blind socket receiving the male part
    • F16C11/0623—Construction or details of the socket member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2226/00—Joining parts; Fastening; Assembling or mounting parts
    • F16C2226/50—Positive connections
    • F16C2226/52—Positive connections with plastic deformation, e.g. caulking or staking
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2360/00—Engines or pumps
    • F16C2360/22—Internal combustion engines

Definitions

  • the invention relates to an insert for supporting an end portion of a support rod, in particular a support rod of a connecting rod for a variable compression of an internal combustion engine and such a connecting rod for a variable compression of an internal combustion engine.
  • a high compression ratio has a positive effect on the efficiency of the internal combustion engine.
  • compression ratio is generally understood the ratio of the entire cylinder space before compression to the remaining cylinder space after compression.
  • the compression ratio may only be selected so high that a so-called "knocking" of the internal combustion engine is avoided during full load operation low cylinder filling, the compression ratio with higher values are selected without a "knocking" would occur.
  • the important part load range of an internal combustion engine can be improved if the compression ratio is variably adjustable. For the adjustment of the compression ratio, for example, systems with variable connecting rod length are known.
  • a generic connecting rod is known for example from DE 10 2013 014 090 A1.
  • the eccentric lever described therein is provided cranked and has on both sides holes for cylindrical rollers, by means of which support rods are attached to the eccentric lever.
  • the production of this compound is expensive and Tolerance deviations can hardly be avoided in consequence.
  • the design of the support rods / eccentric lever connection is very susceptible to tolerance deviations in the eccentric lever due to their existing rotational and translational degrees of freedom.
  • the material of a, for example, work-hardened eccentric lever may be subjected to supercritical loading during operation of the connecting rod by the pressed cylindrical rollers.
  • An object of the invention is to provide an insert for supporting an end portion of a support rod, in particular a support rod of a connecting rod for variable compression of an internal combustion engine, which is highly resilient and allows manufacturing tolerances.
  • Another object is to provide a connecting rod for a variable compression of an internal combustion engine with such insert for supporting an end portion of a support rod.
  • the invention relates to an insert for supporting an end part of a support rod, in particular a support rod of a connecting rod for variable compression of an internal combustion engine, comprising an outer part which has a receiving area in the interior of the outer part.
  • the receiving area has to secure the end portion against slipping out of the receiving area on a radially inwardly projecting securing element, which from a first position for insertion of the end part in the receiving area in the radially inwardly projecting position for securing the end portion in the receiving area is movable.
  • the securing element In the first position for insertion of the end part in the receiving area, the securing element does not protrude into the receiving area or only so far that the end part can be inserted easily.
  • the securing element can be formed by a wall region of the outer part, for example a radially inwardly projecting embossing.
  • the end portion of the support rod in the receiving area in all spatial directions is pivotable and at the same time because of the securing element axially only with high pull-out force from the receiving area pulled out.
  • the outer part can be conveniently made of a material with high hardness, so that the depositor can also absorb high forces without being over-stressed by overstressing and thereby possibly fail.
  • the securing element does not protrude beyond the outer contour of the insert, but into an inner region of the insert, so that a compact design of the insert can be achieved and the insert can also be arranged space, for example, in or on an eccentric lever of a connecting rod.
  • the receiving area may be formed as a ball head receptacle with a cylindrical portion for insertion of a ball head and a subsequent curved portion for supporting the ball head.
  • the insert can be configured as part of a ball joint, so that the receiving area forms a ball head receptacle into which a ball head can be inserted over a cylindrical area, to which a curved area adjoins, which in its contact area with the Ball head is adapted to the outer contour of the ball head and in which the ball head can be stored.
  • the curved area offers a defined end position of the ball head in the axial direction.
  • the arched area is advantageously about as deep as the radius of the ball head.
  • the cylindrical area provides space for the fuse element and is larger in diameter than the ball head.
  • the ball head which can form, for example, the end part of a support rod can be easily inserted into the receiving area and move freely over a large angular range and is still secured by the securing element against slipping out of the receiving area or only with high axial force from the receiving area Extendable.
  • the outer part may have on its outer wall at least one recess with deformable base, wherein the base is deformable to at least partially form the securing element.
  • the ground can be pressed gently inwards, so that the ground gently abuts the outer surface of the ball head.
  • the reason can at least partially form an undercut, which can represent the securing element. The reason may be closed or broken in some areas.
  • the at least one recess may be arranged at the transition between arched region and cylindrical region or in the cylindrical region.
  • the ball head can be freely movable, for example, in the curved area and rotatable over a large angular range, while the recess forms the securing element at the transition between arched area and cylindrical area or in the cylindrical area and prevents the ball head from slipping out of the arched area.
  • the recess may be a blind hole. Such a blind hole is cheap to install in the manufacture of the deposit and have an at least partially preserved hole bottom. Of the Bore ground may thus form a thin ridge that can be easily pushed inward and deformed to form the securing element.
  • two or more blind holes may be arranged on the circumference of the outer part.
  • two or more blind holes may be formed to prevent reliable protection against slipping out of the ball head as an end portion of a support rod from the receiving area.
  • Several formed as a fuse element blind holes can also absorb forces through the ball head cheaper than a single hole because it can be attacked from different sides and a possible tilting of the end portion can be avoided in the receiving area. As a result, a homogenization of the force exerted by the securing elements on the ball head force is possible.
  • the recess may be formed as an annular groove in the outer wall of the outer part.
  • a large number of blind holes on the circumference of an insert can also be represented as an annular groove, the base of which can then be pressed slightly inwards via a forceps-like tool so as to form the securing element. The tool thereby moves the bottom of the blind holes or the groove from the first position into the securing position projecting inwards into the receiving area.
  • the reason of the blind holes or the groove can be deformed after insertion of the ball head and rest all around the ball head. It is also conceivable to press the groove bottom only at individual points inwards.
  • the securing element may be formed by forming a closed base of the recess as a radially inwardly directed curvature.
  • a curvature represents a favorable undercut, which can reliably prevent slipping out of the end portion of the receiving area and at the same time differs from the rounded shape of the Buckle can invest low on a ball head shape, so that the ball head remains free to move over a large angular range.
  • one or more projections may be arranged on sides of the outer part, which are provided in particular for receiving recesses of an eccentric lever of the connecting rod.
  • An insert according to the invention can advantageously be attached, for example, to an eccentric lever via one or more projections and thus securely fastened.
  • About the projections a stable mounting to the eccentric lever is possible, so that even higher forces which are to be transmitted by the eccentric lever on an end portion of a support rod, can be applied inexpensively.
  • About the protrusions an advantageous introduction of force from the eccentric lever in the insert and thus on the end part is possible.
  • the projections can be conveniently connected with a suitable choice of material with the eccentric, for example welded.
  • a connecting rod for a variable compression of an internal combustion engine with an eccentric adjusting device for adjusting an effective connecting rod length is proposed, wherein the eccentric adjusting device has an eccentric lever cooperating with at least one eccentric and acting on the eccentric lever support rods.
  • the support rods are mounted in inserts fixed to the eccentric lever.
  • the inserts each have an outer part with a receiving area in the interior of the outer part, wherein the receiving area for securing the end portion against slipping out of the receiving area has a radially inwardly projecting securing element, from a first position for insertion of the end portion into the receiving area in the radial inwardly projecting position for securing the end part in the receiving area is movable.
  • the securing element In the first position for insertion of the end part in the receiving area, the securing element does not protrude into the Pickup area or only so far that the end part can be easily inserted.
  • connection of the support rods by means of inserts on the eccentric lever a defined interface is created, which is adapted to the end parts of the support rods and can be easily connected to different trained eccentric levers.
  • the adaptation of such a connection joint to the end parts of the support rods is more complicated because of the necessary degrees of freedom of the support rods than the connection of the connecting joint to the eccentric, so that it is convenient to adapt the joint connection of the shape forth to the end portions of the support rods and ensure that the connecting joint is as simple and reliable to arrange and mount the eccentric lever.
  • a favorable mobility of the end portions of the support rods over a larger angular range to achieve since the interface is designed for while on the other hand, the connection to the eccentric lever is as simple and durable as possible.
  • the invention thus allows a simplified eccentric lever construction, so that the production of the eccentric lever can be substantially improved.
  • the proposed design of the support rods allows a reduction in the manufacturing costs and a reduction in the Exzenterhebelbelastung.
  • the insert is inexpensive to manufacture, easy to assemble and offers a high level of security against accidental removal of the end portion of the support rod from the receiving area of the insert and thus from the eccentric lever connected thereto.
  • the inserts can be provided welded to the eccentric lever.
  • the depositors are easy and reliable to arrange the eccentric levers.
  • a high reliability of the connecting rod is ensured in this way, since the support rods are protected with great certainty against accidental disconnection from the eccentric and a malfunction of the connecting rod with variable connecting rod length can be avoided.
  • the support rods may have a ball head at least at one end and each form a ball joint with the inserts.
  • a ball head is a very convenient geometric shape of an end portion of the support rods, as the ball head allows high mobility over a wide range of angles.
  • an abutment for receiving the ball head with a similar spherical geometry can be made very low, so that thereby a very effective ball joint can be realized.
  • Such a ball bearing is inexpensive to manufacture and provides reliable low-friction operation of the function of a connecting rod with variable length of rod.
  • the support rods may have a ball head at both ends.
  • the counter bearing to the receiving area of the insert in the eccentric lever can be designed as a ball head low.
  • an advantageous freedom of movement of the support rod in the eccentric lever and in a driving piston, which can be connected to the other end with the support rod and also with a spherical head receptacle is to make appropriate, guaranteed.
  • a symmetrical design of the support rod could even be dispensed with a directional mounting of the support rod, since they would then be mounted in both orientations.
  • the eccentric lever may be formed in several parts. Conveniently presents a parallel arrangement of two eccentric lever parts to a connected eccentric lever, which comprise an eccentric and are fixedly connected by two inserts at two ends. In this way, an advantageous introduction of force in the eccentric lever is possible. Also, so is the installation of the deposit in the eccentric to make cheap and ensures high reliability of the adjustable connecting rod.
  • the support rods may be provided captively stored in the inserts by a securing element.
  • the securing element prevents by an undercut-like function slipping out of the end portion of the support rod from the receiving area of the insert and thus the eccentric lever associated with the insert, since a free opening of the insert by the securing element in diameter is smaller than a mean diameter of the end portion of the support rod.
  • the end part of the support rod is stored captive in the receiving area of the insert and still grants a high mobility of the support rod over a large angular range.
  • the ground can be pressed gently inwards, so that the bottom bears against the outer surface of the end part.
  • the reason can at least partially form an undercut, which can represent the securing element. The reason may be closed or broken in some areas.
  • a recess at least one blind hole whose bottom is at least partially deformable as an undercut.
  • a blind hole is cheap to install in the manufacture of the insert and may have an at least partially preserved hole bottom.
  • the bottom of the hole may thus form a thin web which can be easily pushed inward and deformed to form the securing element.
  • the fuse element is to represent production technology favorable.
  • the reshaping of the inserts can be carried out after their installation in the eccentric lever, wherein the eccentric lever has through holes, which are aligned with the blind holes of the insert for the introduction of a tool.
  • a part of a tool such as a jaw of a pliers-like tool can engage in the blind holes of the insert from both sides.
  • the forming of the depositors according to another advantageous embodiment can also be carried out prior to their installation in the eccentric lever.
  • the securing element can thus also be produced prior to mounting the insert in the eccentric lever.
  • the end part of the support rod is inserted into the insert and then deformed the bottom of the blind hole as described. Thereafter, the insert can be mounted with the support rod arranged thereon in the eccentric lever and firmly connected.
  • the eccentric lever may be provided cranked. A cranked design of the eccentric lever may be useful for the assembly of the insert, as in this way a stop for the application of depositors prior to attachment, for example by welding with the eccentric lever is present.
  • the eccentric lever may also be provided without cranking.
  • the insert can be freely positioned when mounting on the eccentric lever and are connected in a favorable manner with the eccentric lever via an alignment in the mounting positionally accurate.
  • the eccentric lever may have recesses into which projections of the insert engage.
  • An insert may advantageously be attached to an eccentric lever via one or more protrusions and thus be securely fastened when the eccentric lever has, for example, recesses in which the protrusions can engage.
  • About the projections a stable mounting to the eccentric lever is possible, so that even higher forces which are to be transmitted by the eccentric lever on an end portion of a support rod, can be applied inexpensively.
  • About the associated with the recesses projections is an advantageous introduction of force from the eccentric lever in the insert and thus on the end part possible.
  • the projections can be conveniently connected with a suitable choice of material with the eccentric, for example, weld.
  • the projections of the insert may be complementary to the recesses formed so that an outer contour of the insert is aligned with an outer contour of the eccentric lever in the direction of an eccentric axis.
  • the projections of the inserts can engage in the recesses of the eccentric lever such that the inserts are thus included in the outer contour of the eccentric lever.
  • the outer contour of the eccentric lever appropriately as if they represent a part of the outer contour of the eccentric lever and thus the outer contour of the eccentric lever is closed.
  • Fig. 1 in isometric view a connecting rod for a variable compression of a
  • FIG. 2 shows a longitudinal section of the connecting rod from FIG. 1;
  • FIG. 3 is a side view of an eccentric lever of the connecting rod with two inserts, on which support rods are fixed, according to an embodiment of the invention.
  • FIG. 4a in longitudinal section one in a two-part
  • FIG. 5a in side view an eccentric lever for a connecting rod after a
  • FIG. 5b in side view an eccentric lever for a connecting rod after another
  • Fig. 6 in isometric view of an insert with projections after a
  • Figure 1 shows an isometric view of a connecting rod 1 for a variable compression of an internal combustion engine with two support rods 3, 4 according to an embodiment of the invention.
  • the connecting rod 1 is shown cut longitudinally.
  • the connecting rod 1 has an eccentric adjusting device 18 for adjusting an effective connecting rod length, wherein the eccentric adjusting device 18 with a has at least one eccentric lever 8 cooperating eccentric 7 and acting on the eccentric 8 support rods 3, 4.
  • the support rods 3, 4 are mounted in the eccentric 8 fixed inserts 5, 6.
  • the connecting rod 1 has an upper piston pin bearing eye 17, in which a non-illustrated piston pin is inserted. This piston pin is firmly inserted in a conventional manner in a combustion chamber piston of the internal combustion engine.
  • the piston pin bearing eye 17 is pivotable by means of an eccentric adjusting device 18 about a pivot axis which is parallel offset to the longitudinal axis L of the piston pin bearing eye 17.
  • an eccentric adjusting device 18 it is possible to change the piston pin bearing eye 17 in its distance from a connecting rod bearing axis of a connecting rod bearing.
  • a variable compression of the combustion chamber can be realized.
  • the eccentric adjusting device 18 comprises a pivotally arranged in a bore of the connecting rod 1 eccentric 7.
  • the eccentric 7 is connected to a two-part eccentric lever 8, from which two arms extend diametrically to each other. At the ends of these two arms engage support rods 3, 4. These are hingedly connected to two pistons 2.
  • the eccentric 7 is pivoted within the bore of the connecting rod 1.
  • the one piston 2 moves out of a cylindrical bore within the connecting rod 1, while the other piston 2 moves into a cylindrical bore of the connecting rod 1.
  • the eccentric 7 is pivoted counterclockwise in the direction of rotation.
  • the eccentric 7 is pivoted in the direction of rotation in a clockwise direction.
  • the rotation in the clockwise direction causes a displacement of the piston pin bearing eye further up or further away from the connecting rod bearing axis hinfort. This increases the distance and increases the compression in the combustion chamber.
  • a change-over valve is disposed in a valve receiving bore.
  • the support rods 3, 4 are mounted captive in inserts 5, 6 fastened to the eccentric lever 8 by means of a securing element 54.
  • the inserts 5, 6 are fixedly connected to the eccentric lever 8 and preferably provided welded to the eccentric lever 8.
  • Figures 4a, 4b show a longitudinally sectioned view of a mounted in a two-part eccentric 8 insert 5 with inserted support rod 3, or after the deformation of blind holes 12, 13 as securing element 54.
  • the support rods 3, 4 are in the inserts 5, 6 stored captive by the fuse element 54.
  • This securing element 54 is advantageously formed by forming (flanging, embossing) of the inserts 5, 6.
  • the depositors 5, 6 as a recess 50 blind holes 12, 13 for the introduction of a tool, by means of which the forming takes place before the attachment in the eccentric lever 8.
  • As a securing element 54 to a deformable base 52 of the recess 50 of the insert 5, 6 is provided.
  • the base 52 is at least partially deformable for this purpose as an undercut.
  • the inserts 5, 6 serve to support an end part 21 of the support rod 3, 4 of the connecting rod 1 and comprise an outer part 40, which has a receiving region 31.
  • the insert 5, 6 be designed as part of a ball joint, so that the receiving portion 31 forms a ball head receptacle 30, in which a ball head 20 can be inserted as an end portion 21 of the support rod 3, 4 via a cylindrical portion 34, to which a curved portion 32 connects, which is adapted in its contact area with the ball head 20 to the outer contour of the ball head 20 and in which the ball head 20 can be stored.
  • the curved area 34 offers a defined End position of the ball head 20 in the axial direction.
  • the curved portion 34 is advantageously about as deep as the radius of the ball head 20.
  • the cylindrical portion 34 provides space for the securing element 54 and is larger in diameter than the ball head 20.
  • the ball head 20, for example, the end portion 21 of a support rod 3, 4th can easily be introduced into the receiving area 31 and move freely over a large angular range and is still secured by the securing element 54 against slipping out of the receiving area 31 or only with high axial force from the receiving area 31 extendable.
  • the receiving portion 31 has to secure the end portion 21 against sliding out of the receiving portion 31 in the interior of the receiving portion 31, the radially inwardly projecting securing element 54, which from a first position for inserting the end portion 21 into the receiving area 31 in the radially inwardly projecting position to secure the end portion 21 in the receiving area 31 is movable.
  • the receiving region 31 of the embodiment shown in Figures 4a, 4b is formed as a ball head receptacle 30 with the cylindrical portion 34 for insertion of the ball head 20 formed as end portion 21 and the adjoining arched portion 32 for supporting the ball head 20.
  • the outer part 40 has on its outer wall in each case a recess 50 with deformable base 52, wherein the base 52 is deformable to at least partially form the securing element 54.
  • the recess 50 is arranged at the transition between arched region 32 and cylindrical region 34 or alternatively in the cylindrical region 34 and is designed as a blind hole 12, 13. At the periphery of the outer part 40 and two or more blind holes 12, 13 may be arranged. In the figures 4a, 4b each 2 blind holes 12, 13 are shown cut.
  • the securing element 54 is formed by forming the closed base 52 of the recess 50 as a radially inwardly directed curvature, as shown in Figure 4b. FIGS.
  • the connecting rod 1 before and after the forming of the inserts 5, 6 in order to illustrate the design of the securing element 54.
  • the recess 50 could also be formed as an annular groove in the outer wall of the outer part 40.
  • 8 through-holes 14, 15 are provided in the eccentric lever, which are aligned with the blind bores 12, 13 of the inserts 5, 6 for insertion of a tool. Through the through holes 14, 15, a part of a tool such as a jaw of a pincer-like tool in the blind holes 12, 13 of the insert 5, 6 from both sides 42, 44 engage.
  • the securing element 54 which in the first position for inserting the end part 21 into the receiving area 31 does not protrude into the interior of the receiving area 31, projects into the interior of the receiving area 31 after the base 52 of the blind bores 12, 13 has been formed.
  • the fuse element 54 can be produced inexpensively.
  • the support rods 3, 4 have at least at one end a ball head 20 and thus form with the inserts 5, 6 via the ball head receptacle 30 each have a ball joint.
  • the support rods 3, 4 preferably have a ball head at both ends, as shown in FIG. 2, for example. This makes it possible to compensate for manufacturing deviations and reduce the burden of the eccentric lever 8, which may be formed in one or more parts. In the case of a two-part design of the eccentric lever 8 of the ball head is a more uniform load on the two levers.
  • FIG. 5a shows a side view of an eccentric lever 8 for a connecting rod 1 according to an embodiment of the invention without recess, while in Figure 5b such Eccentric lever 8 is shown according to a further embodiment of the invention with recesses 9.
  • the eccentric lever 8 may be provided cranked according to the embodiments shown.
  • a cranked design of the eccentric lever 8 may be useful for the assembly of the insert 5, 6, as in this way a stop for the application of the insert 5, 6 before attachment, for example by welding, with the eccentric 8 is present.
  • the eccentric lever 8 has recesses 9, in which projections 10, 1 1 of the insert 5, 6, as shown in the embodiment of the insert 5 in Figure 6 are, engage, so that after attachment of the inserts 5, 6 a bottom of the insert 5, 6 terminates with the underside of the eccentric lever 8.
  • FIG. 6 shows an isometric view of an insert 5 with projections 10, 1 1 according to an embodiment of the invention.
  • the insert 5 is formed with a spherical head receptacle 30 as a receiving region 31, which is produced in the outer part 40 in the form of a curved region 32 which adjoins a cylindrical region 34.
  • the trained as a ball head 20 end portion 21 of a support rod 3, 4 is inserted over the cylindrical portion 34 in the curved portion 32 and thus forms with the insert 5 a ball joint.
  • the openings of blind holes 12, 13 can be seen as recesses 50
  • the deformable base 52 (not visible in Figure 6) can be formed as a fuse element 54.
  • the projections 10, 1 1 are formed parallel to each other, which can engage in recesses 9 of an eccentric lever 8 so as to connect the insert 8 fixed to the eccentric lever 8 while maintaining the overall contour of the eccentric lever 8.
  • the insert 5, 6 can be advantageously mounted on an eccentric lever 8 via the two projections 10, 11 and thus securely fastened when the eccentric lever 8 has recesses 9, for example, into which the projections 10, 11 can engage.
  • About the projections a stable mounting to the eccentric lever 8 is possible, so that even higher forces which are to be transmitted through the eccentric 8 on an end portion 21 of a support rod 3, 4, can be applied low.
  • About the associated with the recesses 9 projections 10, 1 1 is an advantageous introduction of force from the eccentric lever 8 in the insert 5, 6 and thus on the end portion 21 is possible.
  • the projections 10, 1 1 can be conveniently connect with a suitable choice of material with the eccentric lever 8, for example, weld.
  • One or more projections 10, 1 1 can be arranged on both sides 42, 44 of the outer part 40, which are provided in particular for receiving recesses 9 of an eccentric lever 8 of the connecting rod 1.
  • the projections 10, 1 1 of the inserts 5, 6 may be suitably designed to be complementary to the recesses 9 so for space reasons that an outer contour of the inserts 5, 6 is aligned with an outer contour of the eccentric lever 8 in the direction of an eccentric axis L. In terms of installation space, it is particularly favorable if the projections 10, 11 of the inserts 5, 6 can engage in the recesses 9 of the eccentric lever 8 such that the inserts 5, 6 are thus included in the outer contour of the eccentric lever.
  • the outer contour of the eccentric lever 8 expediently as if they represent a part of the outer contour of the eccentric lever 8 and thus the outer contour of the eccentric lever 8 is closed.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)

Abstract

L'invention concerne un insert (5, 6), destiné à supporter une partie d'extrémité (21) d'une tige de support (3, 4), en particulier une tige de support d'une bielle (1), comprenant une partie extérieure (40) qui comporte une zone de réception (31) à l'intérieur de la partie extérieure (40). Pour empêcher la partie d'extrémité (21) de glisser hors de la zone de réception (31), la zone de réception (31) comporte un élément de sécurité qui fait saillie radialement vers l'intérieur (54) et qui peut être déplacé d'une première position, dans laquelle la partie d'extrémité (21) est insérée dans la zone de réception (31), jusque dans la position, faisant saillie radialement vers l'intérieur, dans laquelle la partie d'extrémité (21) est sécurisée dans la zone de réception (31). L'invention concerne en outre une bielle (1) équipée d'un tel insert (5, 6).
PCT/EP2016/053497 2015-04-22 2016-02-19 Insert et bielle pour la compression variable d'un moteur à combustion interne WO2016169670A1 (fr)

Applications Claiming Priority (4)

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DE102015106136 2015-04-22
DE102015106136.8 2015-04-22
DE102015109580.7A DE102015109580A1 (de) 2015-04-22 2015-06-16 Einleger und Pleuel für eine variable Verdichtung einer Brennkraftmaschine
DE102015109580.7 2015-06-16

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WO2016169670A1 true WO2016169670A1 (fr) 2016-10-27

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DE102018210687A1 (de) * 2018-06-29 2020-01-02 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Pleuelstange, Umschaltventil, Rückschlagventil und Verbrennungsmotor

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DE102017121630A1 (de) 2017-02-20 2018-08-23 ECO Holding 1 GmbH Pleuel für eine Brennkraftmaschine mit variabler Verdichtung
EP3418533B1 (fr) * 2017-06-23 2020-04-22 ECO Holding 1 GmbH Bielle pour un moteur à combustion interne à compression variable
DE102018103387A1 (de) 2017-06-23 2018-12-27 ECO Holding 1 GmbH Pleuel für eine Brennkraftmaschine mit variabler Verdichtung

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DE102013224270B3 (de) * 2013-11-27 2015-01-08 Schaeffler Technologies Gmbh & Co. Kg Vorrichtung zur Veränderung des Verdichtungsverhältnisses einer Zylindereinheit einer Hubkolbenbrennkraftmaschine
DE102014100585A1 (de) * 2014-01-20 2015-01-22 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Pleuelstange und Verbrennungsmotor
EP2843209A1 (fr) * 2013-08-27 2015-03-04 Dr. Ing. h.c. F. Porsche AG Moteur à combustion interne et bielle
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DE102011002138A1 (de) * 2011-04-18 2012-10-18 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Verstellbare Pleuelstangenvorrichtung für eine Brennkraftmaschine und Brennkraftmaschine mit einer derartigen verstellbaren Pleuelstangenvorrichtung
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US20070163100A1 (en) * 2006-01-17 2007-07-19 Federal Mogul World Wide, Inc. Method of setting the pre-load for a ball socket joint
EP2843209A1 (fr) * 2013-08-27 2015-03-04 Dr. Ing. h.c. F. Porsche AG Moteur à combustion interne et bielle
US20150089781A1 (en) * 2013-09-27 2015-04-02 Daniel W. Barba Ball and Socket Joint Retention for a Hydraulic Pump/Motor
DE102013224270B3 (de) * 2013-11-27 2015-01-08 Schaeffler Technologies Gmbh & Co. Kg Vorrichtung zur Veränderung des Verdichtungsverhältnisses einer Zylindereinheit einer Hubkolbenbrennkraftmaschine
DE102014100585A1 (de) * 2014-01-20 2015-01-22 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Pleuelstange und Verbrennungsmotor

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018210687A1 (de) * 2018-06-29 2020-01-02 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Pleuelstange, Umschaltventil, Rückschlagventil und Verbrennungsmotor

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