US20120097123A1 - Finger lever - Google Patents
Finger lever Download PDFInfo
- Publication number
- US20120097123A1 US20120097123A1 US13/322,797 US201013322797A US2012097123A1 US 20120097123 A1 US20120097123 A1 US 20120097123A1 US 201013322797 A US201013322797 A US 201013322797A US 2012097123 A1 US2012097123 A1 US 2012097123A1
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- United States
- Prior art keywords
- lever
- side walls
- joint socket
- finger lever
- axle
- Prior art date
- Legal status (The legal status 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 status listed.)
- Abandoned
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/18—Rocking arms or levers
- F01L1/185—Overhead end-pivot rocking arms
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/18—Rocking arms or levers
- F01L2001/187—Clips, e.g. for retaining rocker arm on pivot
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L2303/00—Manufacturing of components used in valve arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L2305/00—Valve arrangements comprising rollers
Definitions
- the invention concerns a finger lever for actuating a gas exchange valve of an internal combustion engine, said finger lever comprising a first lever end on which a valve contacting surface for the gas exchange valve extends, and further comprising a lever center in which a roller axle and a roller mounted on said roller axle for contact of a cam extends, and comprising still further a second lever end on which a joint socket for a pivotal mounting of said finger lever on a stationary joint head arranged in the internal combustion engine extends.
- the finger lever comprises two side walls which extend spaced from each other in a longitudinal direction of the finger lever and are made as separate parts while being connected to each other, on the first lever end, through a valve contacting element retained on the side walls, at the lever center, through the roller axle retained in aligned through-openings of the side walls and, on the second lever end, through a joint socket element retained on the side walls.
- a finger lever of the pre-cited type comprising a lever body composed of a plurality of separate parts is disclosed already in the document DE 10 2005 057 298 A1 considered to be generic.
- the modular construction of the multi-part lever body permits a maximized flexibility with regard to matching the finger lever to different valve train kinematics while simultaneously assuring minimized manufacturing costs for sample and large series tools. It is thus possible to equip finger levers of different sizes made after the modular principle with identical valve contacting elements, rollers and joint socket elements and modify only the side walls to suit the specific case of use.
- a drawback of the pre-cited prior art is the proposed joining method for connecting the side walls to the valve contacting element and the joint socket element which are fixed by a sort of key and slot joint on the side walls.
- a constructed finger lever is likewise disclosed in EP 1 500 794 A1 and comprises a valve contacting element made as a separate part.
- This valve contacting element is mounted floatingly and with limited rotational ability in aligned through-openings of the side wall after the manner of a pin and bore connection.
- the side walls are shaped in one piece together with the joint socket element which connects the side walls to each other, so that the above-mentioned flexibility of the finger lever with regard to its matching to different valve train kinematics is not provided, or provided only to an inadequate extent.
- the object of the invention is therefore to improve the constructional design of a finger lever of the aforesaid type so that the cited drawbacks are eliminated.
- the invention achieves the above object by the fact that the side walls on the first lever end and on the second lever end comprise through-openings aligned to each other in pairs, in which through-openings each of the valve contacting element and the joint socket element is retained after the manner of a pin and bore connection by respective axle ends or axle stubs pointing in a transverse direction of the side walls.
- rocker arms assembled together after the modular principle of the invention.
- rocker arms are not mounted for pivoting on one end of the lever but at its center.
- the figures show three-dimensional perspective views of a finger lever in an assembled state as well as the separate parts of the finger lever.
- FIG. 1 show a first embodiment of a finger lever according to the invention
- FIG. 2 show a second embodiment of a finger lever according to the invention
- FIG. 3 show a third embodiment of a finger lever according to the invention
- FIG. 4 show a fourth embodiment of a finger lever according to the invention.
- FIG. 5 show a fifth embodiment of a finger lever according to the invention.
- FIG. 6 show a sixth embodiment of a finger lever according to the invention.
- FIG. 7 show a seventh embodiment of a finger lever according to the invention.
- FIG. 8 show an eighth embodiment of a finger lever according to the invention.
- FIG. 9 show a ninth embodiment of a finger lever according to the invention.
- FIG. 10 show a tenth embodiment of a finger lever according to the invention.
- FIG. 11 show an eleventh embodiment of a finger lever according to the invention.
- FIG. 12 shows a portion of a finger lever valve train, with different valve train kinematics as also finger levers matched to these, following the modular concept.
- FIG. 12 finger levers 1 , 1 ′ und 1 ′′ constructed according to the modular principle of the invention for actuating gas exchange valves in internal combustion engines for different valve train kinematics are represented in a single drawing.
- a valve contacting surface 3 for actuating the gas exchange valve 4 extends on a first lever end 2 of the finger lever, and a joint socket for a pivotal mounting of the finger lever on a joint head of a support element 6 mounted immovably in the internal combustion engine extends on a second lever end 5 of the finger lever.
- the joint socket and the joint head are concealed in the illustration but are made in the form of a semi-spherical recess and as a ball head as known per se.
- a roller axle 8 At the lever center 7 extends a roller axle 8 and, mounted thereon through a rolling bearing or a slide bearing, a roller 9 for a low friction take-up of the lift of a cam 10 .
- matching of the finger levers 1 , 1 ′ und 1 ′′ to the different valve train kinematics is achieved by the fact that the finger levers comprise only a pair of side walls 11 , 11 ′ 11 ′′ that are differently designed whereas the remaining components are identical parts.
- the finger levers 1 , 1 ′ und 1 ′′ correspond to the embodiment of the invention illustrated in FIG. 8 to be described below.
- FIG. 1 shows a finger lever 1 a in the assembled state.
- the finger lever 1 a is composed of two spaced side walls 11 a extending parallel to each other in the longitudinal direction of the finger lever 1 a , a valve contacting element 12 a on which a valve contacting surface 3 extends, a joint socket element 13 a on which a joint socket 14 extends and a roller axle 8 on which a roller 9 is mounted.
- the side walls 11 a made as separate punched parts out of a sheet metal material are disclosed in FIG. 1 a .
- the side walls 11 a comprise on lever ends 2 , 5 and at the lever center 7 through-openings 15 a , 16 a and 17 which are aligned to each other in pairs and in which the valve contacting element 12 a , the joint socket element 13 a and the roller axle 8 are respectively retained after the manner of a pin and bore joint and connect the side walls 11 a to each other.
- valve contacting element 12 a and the joint socket element 13 a are made as sintered parts and are disclosed in enlarged illustrations in FIGS. 1 b and 1 c respectively.
- Both the elements 12 a and 13 a comprise, integrally configured thereon, axle studs 18 a and 19 a respectively which have a cylindrical shape and point in a transverse direction of the side walls 11 a .
- These studs 18 a and 19 a are inserted into the circular through-openings 15 a , 16 a .
- the elements 12 a and 13 a are retained secure against rotation through force locking on the side walls 11 a.
- the finger lever 1 b illustrated in FIG. 2 comprises side walls 11 b whose through-openings 15 b , 16 b on the two lever ends 2 , 5 are not circular but oval in shape.
- the valve contacting element 12 b (see FIG. 2 b ) in this case is an axle with a complementary shape to the through-openings 15 b , i.e. a generally oval cross-sectional shape whose center section is recessed to form the convex valve contacting surface 3 .
- the joint socket element 13 b shown in FIG. 2 c comprises integrally formed axle studs 19 b which have an oval cross-section likewise complementary to the through-openings 16 b .
- the finger lever 1 c disclosed in FIG. 3 likewise comprises a good strength, positive engagement anti-rotation feature of the valve contacting element 12 c and the joint socket element 13 c relative to the side walls 11 c .
- the through-openings 15 c , 16 c similar to the finger lever 1 a , are circular in shape for receiving cylindrical axle ends 18 c and 19 c
- the positive engagement is achieved through the fact that the elements 12 c and 13 c comprise on both sides, projections 20 c and 21 c that extend in transverse direction of the side walls 11 c and engage into complementary recesses 22 and 23 on the lower edges of the side walls 11 c (i.e. on the side turned towards the gas exchange valve).
- valve contacting element 12 c and the joint socket element 13 c are made together with the projections 20 c and 21 c as one-piece sintered parts and are disclosed in enlarged illustrations in FIGS. 3 a and 3 b respectively.
- Each of the elements 12 c , 13 c comprises in this case a cross-bore 24 and 25 respectively through which, during assembly of the finger lever 1 c a cylindrical axle 26 , 27 is inserted.
- the axle ends 18 c and 19 c serve to retain the elements 12 c and 13 c in the through-openings 15 c and 16 c.
- the advantageous feature of the finger levers 1 a to 1 c is the small number of separate parts.
- valve contacting element 12 and the joint socket element 13 are retained for rotation in a transverse direction of the finger lever 1 on the side walls 11 .
- An advantage resulting from this arrangement is the comparatively low friction between the valve contacting surface 3 and the gas exchange valve 4 .
- the arrangement in which the elements 12 and 13 are secured against rotation has the advantage that the ratio between the cam lift curve and the valve lift curve does not vary.
- the finger lever 1 d illustrated in FIG. 4 comprises side walls 11 d according to FIG. 4 a that comprise circular through-openings 15 d and 16 d arranged on the lever ends 2 , 5 .
- the valve contacting element 12 d according to FIG. 4 b and the joint socket element 13 d according to FIG. 4 c comprise cross-bores 24 , 25 for receiving cylindrical axles 26 , 27 whose axle ends 18 d , 19 d in this case, however, extend with a production-conducive clearance fit in the through-openings 15 d and 16 d so that the elements 12 d , 13 d are retained free to rotate on the side walls 11 d , i.e. through any desired angle, in transverse direction of the finger lever 1 d .
- the advantageous feature of this embodiment is the simplicity of manufacture of the finger lever 1 d.
- the valve contacting element 12 and the joint socket element 13 comprise projections 28 and 29 extending in a transverse direction of the side walls 11 , which projections 28 and 29 , for limiting the rotation of the valve contacting element 12 and the joint socket element 13 , abut against stop surfaces 30 and 31 of the side walls 11 .
- the valve contacting elements 12 and the joint socket elements 13 comprise cross-bores 24 , 25 for receiving cylindrical axles 26 , 27 whose axle ends 18 , 19 extend with a production-conducive clearance fit in the through-openings 15 and 16 .
- valve contacting element 12 e (see FIG. 5 b ) and the joint socket element 13 e (see FIG. 5 c ) of the finger lever 1 e disclosed in FIG. 5 comprise on their cross-surfaces cylindrical projections 28 e , 29 e which, according to the longitudinal sectional illustration of the finger lever 1 e (see FIG. 5 a ) extend in circular arc-shaped grooves 32 , 33 of the opposing inner sides of the side walls 11 e to abut against the ends of the grooves 32 , 33 serving as stop surfaces 30 e , 31 e.
- the finger lever 1 f illustrated in FIG. 6 comprises a valve contacting element 12 f according to FIG. 6 b and a joint socket element 13 f according to FIG. 6 c each of these elements has a T-shaped cross-section and, correspondingly, projections 28 f , 29 f in shape of a right parallelepiped, which extend with a clearance, in this case of approximately 0.2 mm, opposite the upper edges of the side walls 11 f according to FIG. 6 a (i.e. on the side turned away from the gas exchange valve) serving as stop surfaces 30 f , 31 f.
- the finger lever 1 g illustrated in FIG. 7 comprises a valve contacting element 12 g according to FIG. 7 a and a joint socket element 13 g according to FIG. 7 b each of which likewise has a T-shaped cross-section and, correspondingly, projections 28 g , 29 g in shape of a right parallelepiped, which extend in this case with a clearance of approximately 0.2 mm, opposite the lower edges of the side walls 11 g serving as stop surfaces 30 g , 31 g.
- the finger lever 1 h illustrated in FIG. 8 differs from the finger lever 1 g only by the fact that the abutting surfaces 34 , 35 of the projections 28 h and 29 h which are configured on the valve contacting element 12 h and on the joint socket element 13 h respectively and situated opposite the lower edges of the side walls 11 h , are not flat but slightly convex in shape, as will become clear through a comparison of FIG. 7 a with FIG. 8 a and of FIG. 7 b with FIG. 8 b.
- the finger lever 1 i according to FIG. 9 corresponds substantially to the finger lever 1 h which is supplemented here with a connecting element 36 for anti-loss retention of the joint socket 14 on the joint head of the support element 6 (see FIG. 12 ).
- the connecting element 36 illustrated in FIG. 9 a and known per se, is made out of a punched and bent thin sheet metal with upwards pointing legs 37 and 38 that are snapped into longitudinal recesses 39 and 40 of a matched joint socket element 13 i as shown in FIG. 9 a.
- the finger lever 1 k disclosed in FIG. 10 comprises, as shown in FIG. 10 a , a joint socket element 13 k which, as compared to the joint socket element 13 i , is made with a greater economy of material.
- the finger lever 1 l disclosed in FIG. 11 comprises a valve contacting element 12 l according to FIG. 11 a and a joint socket element 13 l according to FIG. 11 b , both of these elements being suitable for manufacturing by sintering.
Abstract
The invention proposes a finger lever (1) for actuating a gas exchange valve (4) of an internal combustion engine, said finger lever (1) being composed of side walls (11), a valve contacting element (12), a roller axle (8)/roller (9) and a joint socket element (13). According to the invention, the side walls comprise through-openings (15, 16) that are aligned to each other in pairs and in which each of the valve contacting element and the joint socket element are retained after the manner of a pin and bore connection by respective axle ends or axle stubs (18, 19) pointing in a transverse direction of the side walls.
Description
- The invention concerns a finger lever for actuating a gas exchange valve of an internal combustion engine, said finger lever comprising a first lever end on which a valve contacting surface for the gas exchange valve extends, and further comprising a lever center in which a roller axle and a roller mounted on said roller axle for contact of a cam extends, and comprising still further a second lever end on which a joint socket for a pivotal mounting of said finger lever on a stationary joint head arranged in the internal combustion engine extends. The finger lever comprises two side walls which extend spaced from each other in a longitudinal direction of the finger lever and are made as separate parts while being connected to each other, on the first lever end, through a valve contacting element retained on the side walls, at the lever center, through the roller axle retained in aligned through-openings of the side walls and, on the second lever end, through a joint socket element retained on the side walls.
- A finger lever of the pre-cited type comprising a lever body composed of a plurality of separate parts is disclosed already in the
document DE 10 2005 057 298 A1 considered to be generic. In contrast to finger levers with lever bodies that are shaped out of a single sheet metal blank into a finished component by a multi-step punching and bending method and that, by reason of their dimensioning can be used only in a specific valve train kinematics, the modular construction of the multi-part lever body permits a maximized flexibility with regard to matching the finger lever to different valve train kinematics while simultaneously assuring minimized manufacturing costs for sample and large series tools. It is thus possible to equip finger levers of different sizes made after the modular principle with identical valve contacting elements, rollers and joint socket elements and modify only the side walls to suit the specific case of use. - A drawback of the pre-cited prior art is the proposed joining method for connecting the side walls to the valve contacting element and the joint socket element which are fixed by a sort of key and slot joint on the side walls. With a view to obtaining the precision required for the dynamic fatigue strength of valve train components, a connection of this type can only be realized with correspondingly high complexity and costs involved in the manufacturing.
- A constructed finger lever is likewise disclosed in
EP 1 500 794 A1 and comprises a valve contacting element made as a separate part. This valve contacting element is mounted floatingly and with limited rotational ability in aligned through-openings of the side wall after the manner of a pin and bore connection. The side walls, however, are shaped in one piece together with the joint socket element which connects the side walls to each other, so that the above-mentioned flexibility of the finger lever with regard to its matching to different valve train kinematics is not provided, or provided only to an inadequate extent. - The object of the invention is therefore to improve the constructional design of a finger lever of the aforesaid type so that the cited drawbacks are eliminated.
- The invention achieves the above object by the fact that the side walls on the first lever end and on the second lever end comprise through-openings aligned to each other in pairs, in which through-openings each of the valve contacting element and the joint socket element is retained after the manner of a pin and bore connection by respective axle ends or axle stubs pointing in a transverse direction of the side walls.
- The measures disclosed in the dependent claims constitute appropriate, partially alternative developments of the invention which are described and explained more clearly in the following in connection with further features and advantages of the invention with reference to the appended drawings. In so far as possible and appropriate, these features can also be combined as desired with each other to obtain embodiments other than those represented herein.
- Further, not represented embodiments concern rocker arms assembled together after the modular principle of the invention. In contrast to finger levers, rocker arms are not mounted for pivoting on one end of the lever but at its center.
- The figures show three-dimensional perspective views of a finger lever in an assembled state as well as the separate parts of the finger lever.
-
FIG. 1 show a first embodiment of a finger lever according to the invention; -
FIG. 2 show a second embodiment of a finger lever according to the invention; -
FIG. 3 show a third embodiment of a finger lever according to the invention; -
FIG. 4 show a fourth embodiment of a finger lever according to the invention; -
FIG. 5 show a fifth embodiment of a finger lever according to the invention; -
FIG. 6 show a sixth embodiment of a finger lever according to the invention; -
FIG. 7 show a seventh embodiment of a finger lever according to the invention; -
FIG. 8 show an eighth embodiment of a finger lever according to the invention; -
FIG. 9 show a ninth embodiment of a finger lever according to the invention; -
FIG. 10 show a tenth embodiment of a finger lever according to the invention; -
FIG. 11 show an eleventh embodiment of a finger lever according to the invention; -
FIG. 12 shows a portion of a finger lever valve train, with different valve train kinematics as also finger levers matched to these, following the modular concept. - If not otherwise stated, identical or functionally identical components or features bear the same reference numbers.
- Starting point of the following elucidations is
FIG. 12 in which finger levers 1, 1′ und 1″ constructed according to the modular principle of the invention for actuating gas exchange valves in internal combustion engines for different valve train kinematics are represented in a single drawing. Avalve contacting surface 3 for actuating the gas exchange valve 4 extends on afirst lever end 2 of the finger lever, and a joint socket for a pivotal mounting of the finger lever on a joint head of a support element 6 mounted immovably in the internal combustion engine extends on asecond lever end 5 of the finger lever. The joint socket and the joint head are concealed in the illustration but are made in the form of a semi-spherical recess and as a ball head as known per se. At thelever center 7 extends aroller axle 8 and, mounted thereon through a rolling bearing or a slide bearing, aroller 9 for a low friction take-up of the lift of acam 10. According to the invention, matching of the finger levers 1, 1′ und 1″ to the different valve train kinematics is achieved by the fact that the finger levers comprise only a pair ofside walls FIG. 8 to be described below. -
FIG. 1 shows afinger lever 1 a in the assembled state. Thefinger lever 1 a is composed of two spacedside walls 11 a extending parallel to each other in the longitudinal direction of thefinger lever 1 a, avalve contacting element 12 a on which avalve contacting surface 3 extends, ajoint socket element 13 a on which ajoint socket 14 extends and aroller axle 8 on which aroller 9 is mounted. Theside walls 11 a made as separate punched parts out of a sheet metal material are disclosed inFIG. 1 a. Theside walls 11 a comprise onlever ends lever center 7 through-openings valve contacting element 12 a, thejoint socket element 13 a and theroller axle 8 are respectively retained after the manner of a pin and bore joint and connect theside walls 11 a to each other. - The
valve contacting element 12 a and thejoint socket element 13 a are made as sintered parts and are disclosed in enlarged illustrations inFIGS. 1 b and 1 c respectively. As also valid for the embodiments of the invention according toFIGS. 2 to 11 described below, alternatively, it is also conceivable to use creative forming manufacturing methods such as metal injection molding, casting, extrusion molding, forging etc. Both theelements axle studs side walls 11 a. Thesestuds openings axle studs elements side walls 11 a. - According to
FIG. 2 a, thefinger lever 1 b illustrated inFIG. 2 , comprisesside walls 11 b whose through-openings lever ends valve contacting element 12 b (seeFIG. 2 b) in this case is an axle with a complementary shape to the through-openings 15 b, i.e. a generally oval cross-sectional shape whose center section is recessed to form the convexvalve contacting surface 3. Thejoint socket element 13 b shown inFIG. 2 c comprises integrally formedaxle studs 19 b which have an oval cross-section likewise complementary to the through-openings 16 b. Through the oval axle ends 18 b and theoval axle studs 19 b, thevalve contacting element 12 b and thejoint socket element 13 b are retained secure against rotation by positive engagement in the through-openings axle ends 18 b andaxle studs 19 b have a good mechanical strength. - The
finger lever 1 c disclosed inFIG. 3 likewise comprises a good strength, positive engagement anti-rotation feature of thevalve contacting element 12 c and thejoint socket element 13 c relative to theside walls 11 c. While the through-openings finger lever 1 a, are circular in shape for receiving cylindrical axle ends 18 c and 19 c, the positive engagement is achieved through the fact that theelements projections side walls 11 c and engage intocomplementary recesses side walls 11 c (i.e. on the side turned towards the gas exchange valve). Thevalve contacting element 12 c and thejoint socket element 13 c are made together with theprojections FIGS. 3 a and 3 b respectively. Each of theelements cross-bore finger lever 1 c acylindrical axle 26, 27 is inserted. The axle ends 18 c and 19 c serve to retain theelements openings - The advantageous feature of the finger levers 1 a to 1 c is the small number of separate parts.
- In the examples of embodiment according to
FIGS. 4 to 11 described below, the valve contacting element 12 and the joint socket element 13 are retained for rotation in a transverse direction of thefinger lever 1 on theside walls 11. An advantage resulting from this arrangement is the comparatively low friction between thevalve contacting surface 3 and the gas exchange valve 4. In contrast, the arrangement in which the elements 12 and 13 are secured against rotation has the advantage that the ratio between the cam lift curve and the valve lift curve does not vary. - The
finger lever 1 d illustrated inFIG. 4 comprisesside walls 11 d according toFIG. 4 a that comprise circular through-openings finger lever 1 c, thevalve contacting element 12 d according toFIG. 4 b and thejoint socket element 13 d according toFIG. 4 c comprise cross-bores 24, 25 for receivingcylindrical axles 26, 27 whose axle ends 18 d, 19 d in this case, however, extend with a production-conducive clearance fit in the through-openings elements side walls 11 d, i.e. through any desired angle, in transverse direction of thefinger lever 1 d. The advantageous feature of this embodiment is the simplicity of manufacture of thefinger lever 1 d. - In contrast, in the finger levers 1 represented in
FIGS. 5 to 11 , the valve contacting element 12 and the joint socket element 13 comprise projections 28 and 29 extending in a transverse direction of theside walls 11, which projections 28 and 29, for limiting the rotation of the valve contacting element 12 and the joint socket element 13, abut against stop surfaces 30 and 31 of theside walls 11. Similar to thefinger lever cylindrical axles 26, 27 whose axle ends 18, 19 extend with a production-conducive clearance fit in the through-openings 15 and 16. - The
valve contacting element 12 e (seeFIG. 5 b) and thejoint socket element 13 e (seeFIG. 5 c) of thefinger lever 1 e disclosed inFIG. 5 comprise on their cross-surfacescylindrical projections 28 e, 29 e which, according to the longitudinal sectional illustration of thefinger lever 1 e (seeFIG. 5 a) extend in circular arc-shapedgrooves 32, 33 of the opposing inner sides of theside walls 11 e to abut against the ends of thegrooves 32, 33 serving as stop surfaces 30 e, 31 e. - The
finger lever 1 f illustrated inFIG. 6 comprises avalve contacting element 12 f according toFIG. 6 b and ajoint socket element 13 f according toFIG. 6 c each of these elements has a T-shaped cross-section and, correspondingly,projections side walls 11 f according toFIG. 6 a (i.e. on the side turned away from the gas exchange valve) serving as stop surfaces 30 f,31 f. - The
finger lever 1 g illustrated inFIG. 7 comprises avalve contacting element 12 g according toFIG. 7 a and a joint socket element 13 g according toFIG. 7 b each of which likewise has a T-shaped cross-section and, correspondingly,projections side walls 11 g serving as stop surfaces 30 g, 31 g. - The
finger lever 1 h illustrated inFIG. 8 differs from thefinger lever 1 g only by the fact that the abuttingsurfaces projections valve contacting element 12 h and on thejoint socket element 13 h respectively and situated opposite the lower edges of theside walls 11 h, are not flat but slightly convex in shape, as will become clear through a comparison ofFIG. 7 a withFIG. 8 a and ofFIG. 7 b withFIG. 8 b. - The finger lever 1 i according to
FIG. 9 corresponds substantially to thefinger lever 1 h which is supplemented here with a connectingelement 36 for anti-loss retention of thejoint socket 14 on the joint head of the support element 6 (seeFIG. 12 ). The connectingelement 36 illustrated inFIG. 9 a and known per se, is made out of a punched and bent thin sheet metal withupwards pointing legs longitudinal recesses FIG. 9 a. - The
finger lever 1 k disclosed inFIG. 10 comprises, as shown inFIG. 10 a, ajoint socket element 13 k which, as compared to the joint socket element 13 i, is made with a greater economy of material. - The finger lever 1 l disclosed in
FIG. 11 comprises a valve contacting element 12 l according toFIG. 11 a and a joint socket element 13 l according toFIG. 11 b, both of these elements being suitable for manufacturing by sintering. -
- 1 Finger lever
- 2 First lever end
- 3 Valve contacting surface
- 4 Gas exchange valve
- 5 Second lever end
- 6 Support element
- 7 Lever center
- 8 Roller axle
- 9 Roller
- 10 Cam
- 11 Side wall
- 12 Valve contacting element
- 13 Joint socket element
- 14 Joint socket
- 15 Through-opening on first lever end
- 16 Through-opening on second lever end
- 17 Through-opening at lever center
- 18 Axle end/axle stud
- 19 Axle end/axle stud
- 20 Projection on valve contacting element
- 21 Projection on joint socket element
- 22 Recess on side wall
- 23 Recess on side wall
- 24 Cross-bore in the valve contacting element
- 25 Cross-bore in the joint socket element
- 26 Axle for valve contacting element
- 27 Axle for joint socket element
- 28 Projection for rotation limitation of the valve contacting element
- 29 Projection for rotation limitation of the joint socket element
- 30 Stop surface of the side wall
- 31 Stop surface of the side wall
- 32 Groove in inner side wall on the first lever end
- 33 Groove in inner side wall on the second lever end
- 34 Abutting surface on the valve contacting element
- 35 Abutting surface on the joint socket element
- 36 Connecting element
- 37 Leg of the connecting element
- 38 Leg of the connecting element
- 39 Longitudinal recess on the joint socket element
- 40 Longitudinal recess on the joint socket element
Claims (15)
1. A finger lever (1) for actuating a gas exchange valve (4) of an internal combustion engine, said finger lever (1) comprising a first lever end (2) on which a valve contacting surface (3) for the gas exchange valve (4) extends, and further comprising a lever center (7) in which a roller axle (8) and a roller (9) mounted on said roller axle (8) for contact of a cam (10) extends, and comprising still further a second lever end (5) on which a joint socket (14) for a pivotal mounting of said finger lever (1) on a stationary joint head arranged in the internal combustion engine extends, said finger lever (1) comprising two side walls (11) which extend spaced from each other in a longitudinal direction of the finger lever (1) and are made as separate parts while being connected to each other, on the first lever end (2), through a valve contacting element (12) retained on the side walls (11), at the lever center (7), through the roller axle (8) retained in aligned through-openings (17) of the side walls (11) and, on the second lever end (5), through a joint socket element (13) retained on the side walls (11), characterized in that the side walls (11) on the first lever end (2) and on the second lever end (5) comprise through-openings (15, 16) aligned to each other in pairs, in which through-openings (15, 16) each of the valve contacting element (12) and the joint socket element (13) is retained after the manner of a pin and bore connection by respective axle ends or axle stubs (18, 19) pointing in a transverse direction of the side walls (11).
2. A finger lever (1) according to claim 1 , characterized in that the side walls (11) are made as punched parts out of a sheet metal material and the valve contacting element (12) and the joint socket element (13) are made as sintered or metal injection molded parts.
3. A finger lever (1 a, 1 b) according to claim 1 , characterized in that the axle studs (18, 19) are configured in one piece with the valve contacting element (12 a) and/or with the joint socket element (13 a, 13 b).
4. A finger lever (1 a, 1 b, 1 c) according to claim 1 , characterized in that the valve contacting element (12 a, 12 b, 12 c) and/or the joint socket element (13 a, 13 b, 13 c) is retained secure against rotation on the side walls (11 a, 11 b, 11 c) in transverse direction of the finger lever (1 a, 1 b, 1 c).
5. A finger lever (1 a) according to claim 4 , characterized in that the through-openings (15 a, 16 a) on one or both of the lever ends (2, 5) are circular in shape, and that the axle ends or axle studs (18 a, 19 a) are cylindrical in shape, the valve contacting element (12 a) and/or the joint socket element (13 a) being retained secure against rotation by force locking through riveting of the axle ends or axle studs (18 a, 19 a) in the through-openings (15 a, 16 a).
6. A finger lever (1 b) according to claim 4 , characterized in that the through-openings (15 b, 16 b) on one or on both lever ends (2, 5) are non-circular in shape and that the axle ends (18 b) or axle studs (19 b) have a cross-sectional shape complementary to the through-openings (15 b, 16 b) so that the valve contacting element (12 b) and/or the joint socket element (13 b) are retained secure against rotation by positive engagement in the through-openings (15 b, 16 b).
7. A finger lever (1 b) according to claim 6 , characterized in that the through-openings (15 b, 16 b) and the axle ends (18 b) or axle studs (19 b) are oval in shape.
8. A finger lever (1 c) according to claim 4 , characterized in that the through-openings (15 c, 16 c) on one or on both lever ends (2, 5) are circular in shape and that the axle ends (18 c, 19 c) or axle studs are cylindrical in shape, the valve contacting element (12 c) and/or the joint socket element (13 c) comprise projections (20 c, 21 c) that extend in transverse direction of the side walls (11 c) and engage into complementary recesses (22, 23) of the side walls (11 c) so that the valve contacting element (12 c) and/or the joint socket element (13 c) are retained secure against rotation by positive engagement in the through-openings (15 c, 16 c).
9. A finger lever (1 c to 1 l) according to claim 1 , characterized in that the valve contacting element (12 c to 12 l) and/or the joint socket element (13 c to 13 l) comprises a cross-bore (24, 25) through which an axle (26, 27) is inserted through whose axle ends (18 c, 9 c) the valve contacting element (12 c to 12 l) and/or the joint socket element (13 c to 13 l) is retained in the through-openings (15, 16).
10. A finger lever (1 d to 1 l) according to claim 9 , characterized in that the valve contacting element (12 d to 12 l) and/or the joint socket element (13 d to 13 l) is retained on the side walls (11 d to 11 l) for rotation in transverse direction of the finger lever (1 d to 1 l).
11. A finger lever (1 e to 1 l) according to claim 10 , characterized in that the valve contacting element (12 e to 12 l) and/or the joint socket element (13 e to 13 l) comprises projections (28, 29) that extend in transverse direction of the side walls (11 e to 11 l) and, to limit a rotation of the valve contacting element (12 e to 12 l) and/or of the joint socket element (13 e to 13 l), abut against stop surfaces (30, 31) of the side walls (11 e to 11 l).
12. A finger lever (1 e) according to claim 11 , characterized in that the projections (28 e, 29 e) are cylindrical in shape and extend in circular arc-shaped grooves (32, 33) of inner sides of the side walls (11 e) facing each other, said grooves (32, 33) serving as stop surfaces (30 e, 31 e).
13. A finger lever (1 f to 1 l) according to claim 11 , characterized in that the projections (28, 29) are made substantially in shape of a right parallelepiped and extend with clearance relative to opposing upper edges or lower edges of the side walls (11 f to 11 l) serving as stop surfaces (30, 31).
14. A finger lever (1 f, 1 h to 1 l)) according to claim 13 , characterized in that the abutting surfaces (34, 35) of the projections (28, 29) turned towards the upper edges or lower edges of the side walls (11 f, 1 h to 1 l) have a slightly convex shape.
15. A finger lever (1 i to 1 l) according to claim 1 , characterized in that a connecting element (36) made of flat material is mounted on the joint socket element (13 i to 12 l) for achieving an anti-loss retention of the joint socket (14) on the joint head.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009032582A DE102009032582A1 (en) | 2009-07-10 | 2009-07-10 | cam follower |
DE102009032582.4 | 2009-07-10 | ||
PCT/EP2010/059564 WO2011003867A1 (en) | 2009-07-10 | 2010-07-05 | Cam follower |
Publications (1)
Publication Number | Publication Date |
---|---|
US20120097123A1 true US20120097123A1 (en) | 2012-04-26 |
Family
ID=42590738
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/322,797 Abandoned US20120097123A1 (en) | 2009-07-10 | 2010-07-05 | Finger lever |
Country Status (4)
Country | Link |
---|---|
US (1) | US20120097123A1 (en) |
CN (1) | CN201539284U (en) |
DE (1) | DE102009032582A1 (en) |
WO (1) | WO2011003867A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130186358A1 (en) * | 2012-01-23 | 2013-07-25 | Schaeffler Technologies AG & Co. KG | Roller finger follower with swivelable valve pallet |
US20170211429A1 (en) * | 2014-08-01 | 2017-07-27 | Schaeffler Technologies AG & Co. KG | Lever for the valve actuation of an internal combustion engine |
US10683923B2 (en) | 2017-07-31 | 2020-06-16 | Schaeffler Technologies AG & Co. KG | Rotatable body valve stem contact for switchable roller finger follower |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB201211534D0 (en) * | 2012-06-29 | 2012-08-08 | Eaton Srl | Valve bridge |
CN105179037A (en) * | 2014-06-12 | 2015-12-23 | 舍弗勒技术股份两合公司 | Air valve pressing rod |
US20220228516A1 (en) * | 2019-05-24 | 2022-07-21 | Eaton Intelligent Power Limited | Metal stamped switching roller finger follower |
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US1264083A (en) * | 1917-08-25 | 1918-04-23 | Henri Victor Jules Jouffret | Controlling means. |
DE2146951A1 (en) * | 1971-09-20 | 1973-03-22 | Thurner Bayer Druckguss | ROCKER LEVER AND METHOD OF ITS MANUFACTURING |
JP2802555B2 (en) * | 1991-09-30 | 1998-09-24 | フジオーゼックス株式会社 | Roller rocker arm |
DE19816020A1 (en) * | 1998-04-09 | 1999-10-14 | Volkswagen Ag | Rocker arm |
DE102005057298A1 (en) | 2005-12-01 | 2007-06-06 | Schaeffler Kg | Lever-type cam tracker for valve drive has two transverse sectors in form of individual components with modular assembly to side walls |
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2009
- 2009-07-10 DE DE102009032582A patent/DE102009032582A1/en not_active Withdrawn
- 2009-11-30 CN CN2009202736762U patent/CN201539284U/en not_active Expired - Lifetime
-
2010
- 2010-07-05 US US13/322,797 patent/US20120097123A1/en not_active Abandoned
- 2010-07-05 WO PCT/EP2010/059564 patent/WO2011003867A1/en active Application Filing
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130186358A1 (en) * | 2012-01-23 | 2013-07-25 | Schaeffler Technologies AG & Co. KG | Roller finger follower with swivelable valve pallet |
US20170211429A1 (en) * | 2014-08-01 | 2017-07-27 | Schaeffler Technologies AG & Co. KG | Lever for the valve actuation of an internal combustion engine |
US10683923B2 (en) | 2017-07-31 | 2020-06-16 | Schaeffler Technologies AG & Co. KG | Rotatable body valve stem contact for switchable roller finger follower |
Also Published As
Publication number | Publication date |
---|---|
WO2011003867A1 (en) | 2011-01-13 |
DE102009032582A1 (en) | 2011-01-13 |
CN201539284U (en) | 2010-08-04 |
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Legal Events
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AS | Assignment |
Owner name: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SCHULZE, PETER;WANG, XIULI;REEL/FRAME:027423/0692 Effective date: 20111206 |
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STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |