Abstract: A method for adjusting the tension of a drive belt wherein a tensioning device is pretensioned, e.g., after manufacturing at the plant, with a force corresponding to the force desired for subsequent operation. At this position, calibration markings are formed which can be checked during subsequent adjustments. After being mounted, the drive belt is tensioned until the markings line up.

Abstract: A tensioning device for drive belts includes a pin pivotable about an axis and having an eccentric surface on which a cam is pivotally mounted. A roller adapted to engage a belt is rotatably mounted on the cam. The cam pivots in reaction to forces on a spring acting between the cam and pin. The spring may be preloaded to a specific operating point by rotation of the pin. Markings or projections acting as stops facilitate adjustment of the preloading of the spring.

Abstract: Means for securing a hardened roller bearing ring by means of a press fit on the softer bearing seating surface of a machine part in a predetermined axial position, comprising means defining at least one peripheral groove (6, 7, 8, 9), which has a sharp-edged transition to the surface of the roller bearing ring (2, 4) in the surface of the rolling bearing ring (2, 4) co-existing with the seating surface of the machine part.

Abstract: Pulley for driving the shaft of a water pump, especially a pump for the cooling system of an internal combustion engine, the shaft being designed to be integral with a pulley body carrying the rim of the pulley, characterized in that the rim (15, 25, 31, 37) is designed as a sleeve and is attached to the pulley body (13, 22, 29, 39) in a form-locking or friction-locking manner.

Abstract: In a pre-mounted tensioning device the fastening bolt is covered by the idler wheel. The fastening bolt is serviced through a recess provided in the wheel surface. A pre-mounted unit is created through the insertion of a fastening bolt whose head is pushed by spring elements against the wheel surface, thus preventing the idler wheel from turning and forcing the recess to coincide with the fastening bolt.

Abstract: In a braking device for a drive belt, sector-shaped damping elements are mounted near the swivel bearing of the braking device, in an annular section turned away from the drive belt. This arrangement permits the drive belt to be positioned very close to the swivel axis and saves space, particularly in engine blocks having a number of accessory items and little free space. The spring-loaded mounting of the braking device can be achieved by an axially adjoining flat coil springs in the area of the swivel bearing or by a helical spring in an offset position with respect to the swivel axis.

Abstract: In a drive device for pumps consisting of a pump impeller mounted in a pump chamber, a pump cover covers the pump chamber and has an extension and a bore passing from the pump chamber to the outside. A shaft is connected at its inner end to the pump impeller and at its outer end in a torsion-proof manner by way of a coupling element to a drive wheel. A bearing supports the shaft and drive wheel in the housing bore and extension respectively. The coupling element is formed by an external edge rigidly connected to the drive wheel and covers the outer bearing and the extension laterally on the outside. A cover plate with a center section connects in a torsion-proof manner to the shaft, and is adjusted to elastically adjust the cover plate relative to the pump cover either inward toward the pump chamber or outward away from the pump chamber, thereby providing for automatic adjustment of the radial and axial load-supporting bearings means to remove their play.

Abstract: Two springs inserted in series, which press a tension roller against a drive belt, are provided in a tension device for a drive belt. The tension spring essentially effects adjustment of the tension roller during assembly and after that effectively is inoperative. The working spring is active during operation and within a limited range of adjustment of the tension roller. The tensions of the two springs are designed so that during assembly equilibrium of forces exists at a middle working point within the path of adjustment. These features result in a simple and precise adjustment during assembly.

Abstract: A method for assembling bearing rings in an elongated sleeve member consisting of the steps of forming a roller shell with three sections of varying wall thicknesses separated by angular circumferentially extending shoulders, deforming the shoulder between the middle section and one end section to form a ring-shaped radially, inwardly directed projection by axial displacement of the shoulder. A bearing ring is inserted in the interior of the shell member so that one axial end face engages the first radially oriented projection formed and deforming the shoulder between the middle section and the other end section to form a second radially inwardly directed projection by axial displacement of the shoulder which confronts the opposite axial end face of the bearing ring.

Abstract: In a spring biased tension arrangement for transmission belts, a friction element is installed coaxial with respect to the pivot bearing. The friction element provides a turning direction dependent damping of the pivot arm. It may be disc or sleeve shaped and is inserted in an annular space to contact a limit surface with rubbing contact. Tongues or spoke elements, inclined to the turning direction, have inclinations dependent more or less elastically upon the turning direction and act for example to change the overall height or thickness of the friction element and therewith an increase of the friction force. The tongues or spoke elements can be connected with a separate spring or formed as a unit with the friction element.

Abstract: In a swivel bearing for a braking device the fixed machine part is provided with a flange which has friction surfaces for damping the swivel motion. A flange sleeve made of sheet metal axially and radially surrounds a flange which adjoins the front side of a sleeve section belonging to the swivel arm. The resulting annular space contains, besides the flange, an axially acting spring washer. The flange sleeve itself may optionally have an axial spring action. The flange sleeve is secured axially and against torsion at the sleeve section by means of a turned edge or similar means. The result is a compact arrangement which does not easily disassemble, even in an unmounted condition.

Abstract: A bearing on a shaft is separated from the bore of a housing by an intermediate sleeve. The sleeve has an annular recess in its end surface, the end surface being spaced from the shaft. A sealing element extends radially in the annular recess and axially between the shaft and the intermediate sleeve. The axially extending arm of the sealing element has a flange extending behind a radially extending surface of the intermediate sleeve to axially hold the sealing element, with play, to the intermediate sleeve. The sealing element is mounted with prestress on the shaft, to rotate therewith during operation.

Abstract: A ring-shaped machine part of relatively hard material with an essentially cylindrical seating surface which has at least one ring-shaped milled section on which a machine part of relatively soft material with a corresponding seating surface can be seated coaxially in a form-locking manner. The milled section is provided on at least one axial end of the hard machine part and extends, starting from the cylindrical seating surface, to the end surface.

Abstract: Vibration-damped spring for dynamic tension rollers, consisting of a tubular vibration damper with freedom of linear movement and a helical spring closely surrounding the damper wherein the helical spring has a middle section with turns of a larger diameter and in that, starting from that section, a continuous transition is provided toward the two ends with turns of a smaller diameter.

Abstract: The non-rotating bearing ring of a pivot mounted roller is mounted to be radially movable on an undulated spring and axially held between two machine parts. Friction is produced by relative radial movement between the end surface of the bearing ring and the radially extending surfaces of the machine parts, to result in damping by dissipation of energy. The rubbing surfaces can be coated with friction layer or a solid sliding washer can be employed instead of a coated surface.

Abstract: In a worm gear comprised of a nut and a threaded spindle, the groove bottoms of the threads are provided with a central support projection, and a radially deeper region is provided adjacent the projection on both sides thereof. When radial forces act in the same direction at both ends of the worm gear, the projection serves as a radial support projection with sufficient axial play. By providing convexly curved thread flank surfaces, for example on the nut, the threads run under the same conditions also when the axes of the nut and spindle are inclinded to one another as a result of the application thereto of inclined forces. As a consequence, axial play is reduced. Clamping of the threads is avoided in this case, however, since the support projection hinders a wedging action between the threads of the worm gear.

Abstract: For adjustment of the relative positions of two machine parts, at least one of the machine parts is provided with projections outwardly formed by stamping, the projections having contact surfaces which lie against the other machine part. The adjustment is performed by setting the projections back under the influence of a pressing force according to requirements. By this operation a relatively large contact surface can be provided. The deformation process takes place exclusively in the transition region between the projection and the rest of the machine part. The restoring forces are relatively small and relatively constant over the entire restoring range.

Abstract: A tensioning mechanism for drive belts which consists of a support arm, a rotating tensioning roll mounted on the arm, and a pivot bearing on the support arm a certain distance away from the tensioning roll. The tensioning mechanism is attached together with a mounting plate by a fastener to a machine block. A spring urges the tensioning roll away from the mounting plate and toward the drive belt. In the area of the pivot bearing, the mounting plate has, in the axial direction of the bearing, a fork-shaped cross section with shank sections which support the pivot bearing on both sides, radially and axially, by way of the fastener.

Abstract: An automatic adjustment arrangement for disk brakes has a flanged threaded nut and a threaded spindle threadedly coupled thereto arranged between the brake piston and the hand brake piston. The flange of the threaded nut is axially form-locked and radially displaceable relative to the brake piston. The threaded spindle is rotatably supported in a rolling bearing which is radially displaceable. The hand brake piston and threaded spindle are frictionally coupled. The extension of the adjustment member is produced by rotation of the threaded spindle. To avoid malfunctions, an automatic centering of the entire adjustment element relative to the brake piston as well as relative to the housing is provided. Manufacturing and assembly errors are thereby compensated for. The positions of the threaded spindle and threaded nut can be interchanged.

Abstract: A tensioning arrangement for a drive belt includes a support, a tension roller rotatably mounted on one end of the support, a swivel bearing arranged on the support at a distance from the tension roller, a swivel-damping element in the form of a linear-acting frictional damper having a master piston and a slave piston arranged in and separately frictionally engaging a cylinder, a spring arranged concentrically around the cylinder and coupled to the master piston, and a spring arranged inside the cylinder and coupled to the slave piston. The displacement of the master piston in one direction is opposed by the frictional forces separately acting on both pistons, whereas the displacement of the master piston in the other direction is opposed by the frictional forces acting on only the master piston.