WO2014063690A1 - Lever-like cam follower - Google Patents

Abstract

The invention relates to a lever-like cam follower for a valve drive of an internal combustion engine, comprising an elongated main part (3), which consists of two lateral walls (4) that are connected by a transverse bracket (5). The transverse bracket (5) has on the lower face thereof, at a first end portion (6), a contact surface (9) for a support element and, at a second end portion (8), a contact surface (11) for a valve stem end of a gas exchange valve, wherein the transverse bracket (5) has in a portion (7) close to the centre thereof a run-on face (14) formed by a cam roller (13), and wherein the main part (3) is extruded, wherein the transverse bracket (5) comprises simply a moulded half shell (12) for mounting the cam roller (13) and wherein the half shell (12) is open in a direction facing away from the gas exchange valve.

Description

 Sez iehnuna the Erfiridur c

Hehela r t ig r squat nf olg er

The invention relates to a lever-like sequential follower for a yentlitl of a ren-nary force.

Description of the Invention Lever type cam followers are arranged in internal combustion engines within a truck as a crossover between squats and the gas whiskers to be actuated. Lifting clutch blocks consist of a lever body supported by one end on an abutment member and with its other end via a contact surface the opening Gaswechseiventii attacks in a near-mid section of the smoke body is provided a Nockenahghffstlache on which during operation of a Breonkraftmasehlne a cam of a camshaft starts and a Schw nkbewegyng the lever-like Ncekenfölgers causes. The ockenab- griffsfläehe can be used as Gfeitfläcbe or cam red ^■ usge ild t be ..

Under lever-like cam follower, for example, towing levers, rocker arms or rocker arms are to be understood.

From DE 10 2008 036 056 a Nockenfoiger is known, which is designed as a drag lever. The main body of the finger lever has a bottom from which angled two side winds extend. Between the side walls, a corner blind is arranged in a mid-section. From DE 10 2008 029 333 AI a Schfepphebei for operating «s s Gaswechselvenflls a Br nnkraflmsscM ^' n known, the Schlepphebei has two angled from a bottom side walls, which store a Nöckenroile in a middle close sections. In cross-section: seen the rocker arm has a U gm profile.

The Sehlep leveret known from DE 10 2008 029 333 A1 is designed as a Tlefeleh- or Presssteii,

Summary of the invention

Object of the present invention is to provide a lever-like ockenfolgef welc it is simple and inexpensive to produce

According to the invention, this object is achieved by a camshaft-like cam figger for a valve lanyard of a Brennkraftrnaschlne, with an elongated base body consisting of two Sefenwänden di Dweh a transverse wing are connected, the QuerbOgel on its underside at a first Endahse oitl; an abutment surface for an absorber element and at a second end absc s itt an ontaktfläehe for Ventilschaftefide a Gasweehsei- ventüs, «at the cross-member in a near-rooted section has a formed by a masculine ramp surface and wherein the de main body is flow-pressed _» wherein the crossbar for storage the neck roll only has a molded half shell and the half shell is open in a direction away from the gas groove Ii

By hebeiartlgen Nockenfotgefn are, for example Schleppheb i rocker arm or rocker to understand, in cross section such Nockenföi- ger U-förrnlges _s reverse U-shaped or H-similar profile Shen sen. The ^■ invention is not limited to these types of rMoekenfoige n. By means of a pressed-pressed Grundkör he eleventh low-cost and easy production is achieved! Compared to a Blechäushildung also partially other geometries can be displayed. In the case of the nocturnal observer, the squat roll is stored in a half-shell and runs there as a plain bearing. The half-shell is formed in the cross-piece of the Noekenfolgers. This has the distribution that the known from the prior art pin bearing, d, h. Bol n, Nadelsafö and Bolhighhöhrung etc, eliminated, Accordingly, in such a Nockeorotlen- storage the total weight: and the cost of rMockenfoiger be reduced.

In a preferred embodiment of the invention, the nookenrollie II of the half-shell is snapped in. In order for the tenter-roll to snap into the half-shell, the circumference of the half-shell is made greater than 180 °. When assembling the camshaft into the shank Is a predefined force: required, oil half shell is designed in such a way: that the cam roller in the mounted state no longer fall out of this bm can move out of this, it may therefore be advantageous, the the end of the half-shell turned towards the squat to be flexurally elastic or, as such, to provide snap tabs or similar elements,

Vorzugswelse have the crosswinds a roof-like elevation: on and where the diagonal winds lead the ockenroile laterally. In the center of the middle section, the side walls are roof-like. The rare winds extend beyond the half-shell in the ahgewandte of the gas exchange valve direction The side walls serve dami _<irn the cam roller to guide assembled. In addition, this prevents a lateral displacement of the hockey ropes,

In one embodiment of the invention, the Halh ohaie at least one circumferential Ölversergungsnut on. There may be one or more oil supplies The oil supply groove may also be limited only to a certain area of the circumference of the half-shell.

Beforehand, the Ölversorgyngsnut u extends the contact surface, S whereby a Dryeköischmierung can be made possible. Further, oil can flow through the calotte, the oil supply tube, into the half-shell, and supply it with oil. Lubrication of the cam followers is ensured and wear can not be reduced, 0. An embodiment of the invention is the cam ropes as ing usgeb lde. The ring-shaped design allows weight to be reduced. It is also possible to form the cam ropes made of Vollmatehal. Furthermore, it may be advantageous to reduce the diameter of the camroils, S Courses Description of the drawing n

Hereinafter, an Ausführyngsbeispiel the invention is illustrated by four figures. 1 shows a lever-like oekenfölger according to the invention in a perspective view with a masculine roll,

2 shows a longitudinal section through the lever-type o-corner former according to the invention, a first embodiment of the invention;

6

 3 shows a longitudinal section through the invention according to the invention, according to a second Aysfuhrungstorm, and

Flg. 4 is a longitudinal section through the invention-like nozzle follower according to a third embodiment; Detailed description of the drawings

FIG. 1 shows an aerodynamic lever-type follower 1, which is designed as a sole plate elevator 2. The drag lever 2 has a longitudinal body 3. The main body 3 has side winds 4, which are connected by a cross bar 5. Further, the main body 3 is in a first Eababsehniri 8, a mid-section 7 and a second end portion. 8 divided. The end sections 6 _S 8 have rounded ends 6 a, Sa of the cross bar 5.

For nourishing description, FIG. 2 is used, which shows a first embodiment.

 De first end portion 6 has on the underside of the cross bar 5 a Ängaflaofie 9 for a not shown Äbsfützeiement on. The abutment surface 9 is formed by a calotte 10 which is embedded in the transverse yoke 5 and softens between the crosswinds 4. The cap 10 serves to support on a: not shown Abstützelen eni

On the second end portion 8 of the main body 3 extending part of the cross bar 5 an ontakiflaehe 11 is provided for an unillustrated Veniiischaf- tende a Gaswechselventii. The Kontakifläche 11 is provided as a rectangular recess in the cross bar S.

In the area of the middle! Section 7 is in the Qeerhöge! 5 a Haibscha- le 12 formed in the half-shell 1, a cam roller 13 is mounted, which surface 14 forms the Anlauffl for a cam, not shown. The squat roll 13 is snapped into the half shell 12. The teasing roll 13 can be formed as ing bm from Vollmatedal. In the adjacent section 7, the side walls 4 are raised roof-like, causing them to move to the squat space 13

As can be seen especially in FIG. 2, at least one oil supply groove 15 is provided in the half-shank, in this case two are parallel to one another arranged Olversorgyngsnuten 15 is provided. Dm Ölversörgyngsnu! 15 extends over the entire length of the half-shank 12. The ends 16 of the Öiver- ororgyngsnyl 15 are formed open in this Äusführungs example. Figures 3 and 4 describe further embodiments of the inventive wobble-type cam follower 1. For ease of description, corresponding parts will be identified with the same reference numerals as in the preceding Figures. FIG. 3 shows a second exemplary embodiment of the cam follower 1 according to the invention. The difference between the cam follower 1 shown in this embodiment is the design of the oil supply groove 17, the oil supply groove 1? extends over the entire length of the half-chill 12, the ends IS are formed here but closed.

Figure 4 shows a third usführungsbelsplel of erflndongsgeniä & Mocten- en folgers _t in which the difference in the formation of the Öjversorgyngsnut inspects 1.0. The Ölversorgungsnut 19 extends over the entire length of the half-shell 12 _s with the ends 20 are formed closed, loaded * extends in the region of the first end portion, starting from the Öungsorgyngsnut 19 another Ölversorgungsnyt 21. The Ölversorgungsnut 21 connects between the half-shell 12 and the calot 10, whereby a Druckölschmlerung is made possible.

Hefoeianiger Nockenfeiger drag lever

 mist body

 Side wall

 Cross uge!

 first end section

a a reported end

 nteteonaher section second Endabschnitta rounded end

 Anlagefiäehe

0 aiotte

1 contact area

2 Haibschaie

3 cam roller

4 start laugh

6 Oil supply s? Ut

8 ends of oil supply groove

? Ölversorgyngsnut

8 ends of the oil supply groove

 Ölvemorgungsnut

0 ends of the oil supply pass

1 oil supply groove

Claims

 claims A helical Nookenfoiger for a VentH called an internal combustion engine, with an elongated basic body (3), consisting of lateral winches (4) _t which are connected to a Q-bracket <S, whereby the Öuerfcögel (5 at its underside at a first Endabschnift (6) a Anlageflaehe (9) for ebebstetenetement and at a second end portion iß) a Kontakfiäche (11) for a yverdlschaftende a Gas «Wechselvenliis has the Quererbüfß! (5) in a middle section (7) has a contact surface (14) defined by a bolster (13), and wherein the main body (3) is flow-molded and pressed, that the crossbeam (FIG. 5) for the storage of masculine (13) only a molded half-shell (12). a "fweisi and wherein the Haibschaie (12) is open in a direction away from the gas exchange vane direction. Hehefartlger Nockenfblger according to claim 1, wherein the cckenroile (3) in the half-shell. (1-2) is snap inserted Is. Lever-type Nookenfoiger according to one of the preceding claims:, wherein the side walls (4) have a roof-like elevation u d wherein the side walls (4) the NookenroSie (3) drive laterally, Heheiartiger Mockenfolge according to one of the preceding Ansprüc e, wherein the half-shell (12) has at least one circumferential Ölversorgungs- groove (16, 1? .. 19). A lever-type cam follower according to claim 4, wherein the oil supply $ n.ut (15, 17, 19) extends to the annealing surface (9). Lever-like Noekenfoigef according to one of the preceding claims, wherein the Hockenrole (13) is formed as a ring.