Cam follower for a valve train of an internal combustion engine

摘要

A cam follower for a valve train of an internal combustion engine, the cam follower being formed as a lever, which is U-shaped in cross-section, and produced from steel sheet without machining, and which has a floor wall (3) and lateral walls (4 and 5) extending therefrom, wherein a valve stem support (10) is disposed as a groove (11) at one end of the lever in a surface of the floor wall (3) facing away from the lateral walls (4 and 5). Lateral guide walls (12 and 13) of the valve stem support (10) are formed by chipless shaping so as to extend from and counter to the lateral walls (4 and 5) and are connected to a support wall (14) that forms a valve stem support surface (10a). The valve stem support surface (10a) extends in a first plane (10b), which is spaced from a second plane (16a), which extends through an internal transition (15, 16) between the lateral walls (4 and 5) and the adjacent guide walls (12 and 13), in the direction of ends (19, 20) of the lateral walls (4 and 5). In order to reduce stress and resulting cracks, an inner radius R is provided at the transition (15 and 16), by which radius a free space (17, 18) is created between the lateral wall (4, 5) and the guide wall (12, 13), which free space narrows towards the end (19, 20) of the respective lateral wall (4, 5).

主权项

1. A cam follower for a valve train of an internal combustion engine, comprising viewed in cross section, a U-shaped lever made from sheet steel in a non-cutting process including a base wall and side walls extending from said base wall, wherein a valve stem support formed as a groove is provided on one end of the lever in a surface of the base wall facing away from the side walls, the valve stem support includes side guide walls formed by a non-cutting shaping process extending from and counter to the side walls and are connected to a support wall forming a valve stem support surface, the valve stem support surface extends in a first plane that is spaced apart from a second plane extending through an inner transition between the side walls and the adjacent guide walls in a direction of free ends of the side walls, at the transition, an inner radius R is provided by which a free space is created between each of the side walls, and the guide walls and said free space narrows in the direction of the free end of the respective side wall, wherein the inner radius R and the free space are formed as a common indentation in the inner transition, in the side wall, and in the guide wall.