Abstract: A gearwheel for a balance shaft includes a gear ring and a gear core, where the gear ring is fabricated of a first metal and the gear core of a second metal, where the second metal has a lower density than the first metal, where the gear core and the gear ring are compressed to each other at an inner surface of the gear ring, the gearwheel further including formfitting elements to form an additional formfitting between the gear ring and the gear core, where, as seen in a circumferential direction along the inner surface of the gear ring, a distance between two adjacent formfitting elements is larger than an extension of the formfitting element along the circumferential direction.

Abstract: A locking device for a connecting arrangement between a connecting piece and a plug-type connector, which connecting piece has, radially on the outside, at least one first undercut region extending in the circumferential direction, which plug-type connector has, radially on the inside, at least one second undercut region which is suitable for corresponding with the first undercut region in an engagement position and can be elastically deformed in the radial direction such that the first undercut region and the second undercut region can be engaged or disengaged. The locking device is suitable for preventing a radial elastic deformation of the plug-type connector at least to such an extent that, in the connecting position, the first undercut region and the second undercut region are fixed in the corresponding engagement position.

Abstract: A valve tappet system includes a base body, a lateral section, which forms a guide surface for guiding the base body along an oscillation axis. The anti-rotation element to suppress a rotational or swiveling movement about the oscillation axis. The anti-rotation element has a seat face which sits on the lateral section and a guide body which protrudes beyond the lateral section in the radial direction. Spaced first and second engagement protrusions are provided on the element, and the lateral section is provided with a first and second radial bores assigned to the respective first and second engagement protrusions, which are each engaged in the respective radial bore radially to the oscillation axis.

Abstract: A valve tappet system includes a base body, a lateral section, which forms a guide surface for guiding the base body along an oscillation axis. The anti-rotation element to suppress a rotational or swiveling movement about the oscillation axis. The anti-rotation element has a seat face which sits on the lateral section and a guide body which protrudes beyond the lateral section in the radial direction. Spaced first and second engagement protrusions are provided on the element, and the lateral section is provided with a first and second radial bores assigned to the respective first and second engagement protrusions, which are each engaged in the respective radial bore radially to the oscillation axis.