US3584612A - Rocker mounting, especially for valve controlled reciprocal piston internal combustion engines - Google Patents

Abstract

A rocker mounting for a valve controlled reciprocable piston internal combustion engine in which the rockers are mounted on the inner ends of pivots located in the sidewalls of the cylinder head and firmly connected thereto by socket head capscrews extending through said pivots.

Description

United States Patent Inventor Appl, No Filed Patented Assignee Priority Jurgen Uflacker Stumpen, Germany 875,058

Nov. 10, 1969 June 15, 1971 Klockner-Humboldt-Deutz Aktiengesellschaft Cologne-Deutz, Germany Nov. 19, 1968 Germany ROCKER MOUNTING, ESPECIALLY FOR VALVE CONTROLLED RECIPROCAL PISTON INTERNAL COMBUSTION ENGINES 6 Claims, 1 Drawing Fig.

U.S. C1 123/90.41, 123/193,123/195 1nt.C1 F011l/18, F02f 1/32 Field of Search 123/90,

Primary ExaminerAl Lawrence Smith Altorneywalter Becker ABSTRACT: A rocker mounting for a valve controlled reciprocable piston internal combustion engine in which the rockers are mounted on the inner ends of pivots located in the sidewalls of the cylinder head and firmly connected thereto by socket head capscrews extending through said pivots.

ATENTEDJUMSISTI 3,584,612

IN VE N TOR Jay )1 9 Ver- The present invention concerns a journaling arrangement for the rockers for a valve controlled piston operated internal combustion engine in which the valves suspended in the cylinder head are actuated by rockers which are pivotably journaled on a shaft connected to the sidewalls of the cast-on rocker chamber.

Such journaling arrangement for rockers is known in connection with air-cooled piston operated internal combustion engines according to which the cylinder head comprises an upper portion with cast-on rocker chamber and a lower portion. This known journaling arrangement for rockers has the drawback that special provisions have to be made in order to prevent the rocker shaft from being displaced in axial direction. Such special means to this end have to be pressed into the cast-on part if a relatively high rigidity of the joumaling arrangement is to be secured.

It is an object of the present invention to provide a journaling arrangement for rockers which can easily be assembled and can rigidly be connected to the cylinder head.

This object and other objects and advantages of the invention will appear more clearly from the following specification in connection with the accompanying drawing which illustrates a partial section through a cylinder head as far as necessary for the understanding of the invention.

The problem underlying the present invention has been solved according to the invention by bracing the rocker shaft to the sidewalls of the rocker chamber by means of socket head capscrews which extend in transverse direction through said rocker shaft.

In view of the tension of the tightened socker head capscrews the sidewalls of the cast-on rocker chamber are deformed to such an extent that the rocker shaft is clamped in. The rocker shaft is thus properly fixed without the employment of additional structural elements and can easily be disassembled and reassembled after the corresponding socket head capscrews have been loosened.

According to a particularly advantageous design in conform ity with the invention, it is possible to journal each rocker on a unilaterally clamped-in rocker shaft. Such an arrangement has the advantage that the angle of inclination of the injection valve with regard to the cylinder axis is not limited by the rocker shaft.

According to a further development of the invention, the planes perpendicular to the rocker shafts confine with the cylinder axis an acute angle. This has the advantage that the rockers and valves can without any particular additional elements be arranged in an inclined position independently of each other. For purposes of simplifying the assembly and properly fixing the element, it may be advantageous to design the socket head capscrews which extend through the rocker shaft within the area of the rocker shaft as fitting screws or bolts.

In addition to the above outlined advantages, with the arrangement according to the present invention it is also possible for heretofore known designs of the type involved to realize larger cross sections for the cooling passages while simultaneously obtaining a higher rigidity. This is due primarily to the fact that aside from the required socket head capscrews for the rocker journaling no further connecting screws with additional accumulation of casting material are required within the area of the cooling passages.

Referring now to the drawing in detail, the arrangement shown therein comprises a cylinder head of an air-cooled piston operated internal combustion engine the central portion of which is passed through by cooling passages 2. Above said cooling passages 2 there is cast on a rocker chamber 3 in which valves (not illustrated) are provided in suspended arrangement. Two rocker shafts 4 and 5 are unilaterally clamped into the sidewalls of the rocker chamber 3. Pivotally mounted on said rocker shafts 4 and. 5 are rockers 6 and 7 respectively. The rocker shafts 4 and 5 are provided with transverse bores 9 and 10. The socket head capscrews l1 and 12 are passed through said transverse bores 9 and 10 respectively which screws, within the area of said rocker shafts 4 and 5, are designed as fitting bolts.

Below the screw heads 13 and 14 of the screws 11 and 12 there are provided discs 15 and 16.. When tightening the screws 11 and 12, the sidewalls of the rocker chamber 3 are deformed elastically to such an extent that the rocker shafts 4 and 5 are firmly clamped in. The rockers 6 and 7 are secured against axial displacement on the rocker shafts 4 and 5 by spring rings 17 and 18.

The dot-dash indicated cylinder axis is designated with the reference numeral 19. While the plane 21 perpendicular to the rocker shaft 5 extends parallel to the cylinder axis 19, the plane 20 perpendicular to the rocker axis 4 confines with the cylinder axis 19 and acute angle a. The angle a depends on the respective construction of the cylinder head. The rocker chamber 3 is closed by a cover 22.

It is, of course, to be understood that the present invention is, by no means, limited to the particular construction shown in the drawing but also comprises any modifications within the scope of the appended claims.

What I claim is:

l. A rocker mounting for a valve controlled reciprocable piston internal combustion engine, which comprises: a cylinder head having sidewalls arranged opposite and in spaced relationship to each other and together with each other and with another cylinder head portion therebetween defining a rocker chamber, each of said sidewalls being provided with a bore having the extension of its axis extend into said rocker chamber, shaft means arranged in said bores, and screwbolt means extending through said shaft means and tightly threaded into said cylinder head so as to firmly connect said shaft means to said cylinder head, said shaft means being adapted pivotally to receive and support rocker means for actuating pertaining valves of the engine.

2. A rocker mounting according to claim 1, in which said shaft means comprises two pivots respectively mounted in said bores having their inner ends extend into said rocker chamber for pivotally supporting rocker means.

3. A rocker mounting according to claim 1, in which said screwbolt means within the range of said shaft means have a fitting section.

4. A rocker mounting according to claim 2, which includes abutment means respectively provided at the inner ends of said pivots for preventing rocker means mounted thereon from accidentally leaving the pertaining pivot.

5. A rocker mounting according to claim 4, in which said abutment means are respectively formed by spring rings.

6. A rocker mounting according to claim 2, in which the planes respectively perpendicular to the axes of said pivots define different angles with the plane of symmetry of said cylinder head between the inner ends of said pivots.

Claims (6)

1. A rocker mounting for a valve controlled reciprocable piston internal combustion engine, which comprises: a cylinder head having sidewalls arranged opposite and in spaced relationship to each other and together with each other and with another cylinder head portion therebetween defining a rocker chamber, each of said sidewalls being provided with a bore having the extension of its axis extend into said rocker chamber, shaft means arranged in said bores, and screwbolt means extending through said shaft means and tightly threaded into said cylinder head so as to firmly connect said shaft means to said cylinder head, said shaft means being adapted pivotally to receive and support rocker means for actuating pertaining valves of the engine.

2. A rocker mounting according to claim 1, in which said shaft means comprises two pivots respectively mounted in said bores having their inner ends extend into said rocker chamber for pivotally supporting rocker means.

3. A rocker mounting according to claim 1, in which said screwbolt means within the range of said shaft means have a fitting section.

4. A rocker mounting according to claim 2, which includes abutment means respectively provided at the inner ends of said pivots for preventing rocker means mounted thereon from accidentally leaving the pertaining pivot.

5. A rocker mounting according to claim 4, in which said abutment means are respectively formed by spring rings.

6. A rocker mounting according to claim 2, in which the planes respectively perpendicular to the axes of said pivots define different angles with the plane of symmetry of said cylinder head between the inner ends of said pivots.

Images