Abstract: The inventions provides a method of making a lever-type cam follower (2) out of thin-walled light-weight sheet metal for loading at least one gas exchange valve of an internal combustion engine, said cam follower comprising two side walls (12a, 12b) which, together with a crossbeam (11) that connects these side walls to each other, form a U-shaped cross-sectional profile pointing away from the gas exchange valve, the cam follower further comprising two finger-like tabs (5a, 5b) for receiving a stem end of the gas exchange valve, which tabs are configured on one end (3) of the cam follower (2) as extensions of the side walls (12a, 12b) and are bent through 180° onto an undersurface (9) of the crossbeam (11), said method comprising the following steps which may be supplemented with further intermediate steps: a) punching out a blank (1) out of sheet metal with the tabs (5a, 5b) being bulged outward in arc-shaped curves that are configured as mirror images of each other in respect of a central longitudinal

Abstract: The invention concerns a rotary piston adjuster for adjusting the angular position of the camshaft of an internal combustion engine, said adjuster comprising an outer rotor having at least one hydraulic chamber and an inner rotor having at least one pivoting vane that can pivot hydraulically between a retard stop position and an advance stop position, said adjuster further comprising a locking device suitable for detachably connecting the outer and inner rotors. Operational reliability and wear resistance as well as less constructional work are achieved according to the invention by the fact that the locking device (8) and the stops (27, 28) are arranged in an attachment (4) that is connected to the rotary piston adjuster and whose components are wear-resistant.

Abstract: In a cage for cylindrical rolling bearings (5), which cage is rolled out of a sheet metal strip (12), the pockets (4), as seen in a top view, have, in a profiled, punched and unbent state of the sheet metal strip (12), a curved shape in a region of the inclined sections (8, 9), so that an axially inner, first convex curve B1 merges into an outer, second concave curve B2. This pocket contour of the invention makes it possible to obtain a separation between the retention of the rolling elements and the contact region of the rolling elements in the cage solely by the punching of the pockets in combination with a subsequent bending of the cage strip into a finished cage.

Abstract: A linear guide comprises a traveling carriage (1) having track rollers (11) for support and for rolling along a guide rail (5), said track rollers (11), each of which rolls on the guide rail (5), being mounted in pairs for rotation on a first support (7) that is arranged on a first carriage plate (2) of the traveling carriage (1). The traveling carriage (1) comprises a further carriage plate (3) with a second support (14) arranged thereon, and track rollers (17) rotatably mounted on said second support (14) for rolling on a further guide rail (6), the two guide rails (5, 6) being parallel to each other and fixed on two longitudinal sides of a central rail support (4).

Abstract: Tensioning device for traction means, such as belts or chains, with a housing-like part in which a tensioning mechanism and a spring elements tensioning the traction means are mounted, whereby the tensioning device can be placed in an assemblage of the traction means drive having a drive shaft so that the tensioning mechanism encompasses the drive shaft, with the housing-like part being disposed so as to prevent rotation, wherein the tensioning mechanism comprises two tensioning arms (7, 8, 26, 27, 47, 49) that are mounted in the housing-like part so as to be able to rotate about axes and with respect to one another, with the tensioning arms being spring-biased by a common spring element (14) that is retained with one end in one tensioning arm and with the other end in the other tensioning arm.

Abstract: An idler gear (7) is mounted in a variable speed gear transmission (1) on a rolling bearing crown ring (10) whose first and second rolling elements (12, 20) are guided in a cage (11) and have different diameters. The first and second rolling elements (12, 20) are of a same type, size ratios between the first and second rolling elements are defined so that, in an unloaded state, the larger diameter of the second rolling elements (20) is such as to become equal to a diameter of the first rolling elements (12) in an engaged state under radial loading, whereby a limit of elasticity of the second rolling elements (20) having the larger diameter in the unloaded state is not exceeded.

Abstract: In a linear rolling bearing comprising a shaft (1) acting as a guide rail and having a profiled or round, particularly circular cross-section, an outer peripheral surface of the shaft forming raceways (6) extending in longitudinal direction for rolling elements, for example, balls, cylindrical rollers or convex rollers, the linear rolling bearing further comprising a cup (2) surrounding the shaft (1) and the rolling elements (3), said cup comprising on an inner surface opposing raceways (7) for the rolling elements (3) while being arranged in a reception or a bore (10) of a connecting structure (11), the cup (2) has a divided configuration in longitudinal direction and is composed of a plurality of segments that comprise the opposing raceways (7) and further comprise support surfaces extending parallel to the opposing raceways (7), through which support surfaces, the segments are supported on one another in peripheral direction of the cup (2).

Abstract: In a sliding sleeve (1) of a synchronizing unit having inward directed teeth (2, 11) configured on the inner periphery of the sliding sleeve, the teeth (11) comprise recesses (11a) formed by plastic displacement of material out of the teeth (11).

Abstract: The invention relates to an electrically driven device (1) for the angular adjustment of a shaft relative to its drive (2), said device comprising an eccentric gearing that comprises at least one internally geared wheel and one spur gear that meshes with the internally geared wheel and can be driven by an electrically rotatable eccentric shaft. The considerable structural complexity and space requirement as also the noise level of prior art devices is reduced by the fact that the internally geared wheel is configured as a first and a second internally geared wheel (6, 9), and the spur gear is configured as a first and a second spur gear (16, 17) that have the same number of teeth and are rotatable in opposite directions, the internally geared wheels (6, 9) are connected to the drive (2) and the spur gears (16, 17) are connected to the camshaft and can be driven through a double eccentric shaft (20) comprising identical eccentrics (18, 19) arranged offset at 180° to each other.

Abstract: A chain tensioner, includes a housing intended for attachment to a stationary machine element of an internal combustion engine, and a piston received in the housing for axial displacement against a strand of a chain to thereby implement a tensioning of the chain. An adjusting mechanism is provided for moving the housing relative to the machine element in a direction to and away from the strand of the chain, whereby a spacer establishes a distance between the housing and the strand to thereby define an installation position of the housing.

Abstract: An axial bearing unit made up of a cage (2) and races (3, 4) is in which the collar (5) located at the outer peripheral edge of the race (3) is extended by a first flange (7) and a protruding rib (8) is formed in an area made up of the collar (5) and the flange (7). The protruding rib faces inwardly to radially contain the cage (2).

Abstract: An axial bearing comprising two runner plates held together by a resilient retaining ring having two angled settings. The retaining ring has holding lugs whose circumcircle can be changed in diameter D1 or D2 by a resilient reversible changeover to selectively hold the runner plates together or release the holding.

Abstract: In a valve drive for an internal combustion engine, an elongated securing device or anti-rotation bridge referred to as a mounting aid has receptacle spaces, arranged at intervals one behind the other, for receiving respective valve tappets. Each valve tappet can be displaced longitudinally in its receptacle space. The tappet is secured against rotation by two parallel planar keying faces formed on its outer surface which bear against corresponding inner surfaces in a receptacle space of the mounting aid. The mounting aid has receptacle spaces with a relatively small interval dimension between the two inner surfaces for bearing against the keying faces of standard roller tappets and has receptacle spaces with a relatively large interval dimension between the two inner surfaces for bearing against the keying faces of switchable roller tappets.

Abstract: The cup tappet (1) of the invention for a valve train of an internal combustion engine comprises a hollow cylindrical skirt (2) whose one end (3) is connected to a bottom (5) for making contact with a cam. The skirt (2) has a clearly smaller height than the overall height of the cup tappet (1), and the bottom (5) rises in a roof-like taper from said end (3). By virtue of this configuration, the bottom (5) has a very high rigidity, so that it is possible to minimize its thickness ‘d’ significantly compared to thicknesses of prior art cup tappet bottoms.

Abstract: A traction device for an internal combustion engine includes a tensioning device having two lever arms of different lengths which are rigidly connected together and which are pivotally mounted for rotation about a rotation axis. Each of the lever arms supports on one end a tension pulley. The tensioning device is provided for positioning the tension pulleys on a pulling strand and a return strand by imposing an elastic force thereon.

Abstract: A linear drive comprising a housing and a rail, which is mounted on the housing such that they can move relatively. Drive elements on the housing and on the rail to produce relative movement between the housing and the rail. The housing has a braking device to interact with a brake track provided on the rail. The brake track is in a groove in the rail. Anti-friction elements between the housing and the rail ride in the groove.

Abstract: A device (1) for hydraulic rotational angle adjustment of a camshaft relative to a crankshaft of an internal combustion engine including a drive unit (4) connected with the crankshaft and an output unit (5) non-rotatably connected with the camshaft. The drive unit (4) stands in power transmitting connection with the output unit (5) through at least two pressure chambers (6, 7) formed inside the device (1) which bring about, under action by pressure under continuous compensation for external pressure leakages, a relative rotation or a hydraulic clamping of the output unit (5) in relation to the drive unit (4). In addition, the device (1) has a coil spring (8) arranged outside the device which is provided for adaptation of its adjustment speeds in both adjustment directions.

Abstract: What is proposed is a switchable tappet (1) for the direct transmission of a cam lift to a tappet push rod. The tappet (1) comprises a hydraulic clearance compensation element (31) and has an excellent hydraulic rigidity compared to the prior art. This is achieved by a leak gap positioned radially very far outwards. This leak gap is situated directly between a housing (2) and a pressure piston (4) which, in its turn, encloses an inner element (11) that acts on a tappet push rod.

Abstract: In a linear rolling bearing, a plurality of ball circuits are arranged behind one another in peripheral direction around a guide rail. At least one ball circuit comprising a load-bearing section, a returning section and two deflecting sections which connect these load-bearing and returning sections to each other are retained in a segmental cage housing. This is formed by an inner cage part (11) and an outer cage part (12) and comprises a load-bearing raceway element (9) that is fitted into a through-aperture of the outer cage part (12). The balls (8) of the load-bearing section are supported on one side on a raceway of the load-bearing raceway element (9) and project through a slot (14) of the inner cage part (11) to be supported on another side on the guide rail for rolling in the longitudinal direction thereof. According to the invention, each segmental cage housing can be separately inserted and removed in radial direction from a recess of a cage bushing (1) surrounding the guide rail.

Abstract: In a valve train of an internal combustion engine, which valve train comprises an elongate anti-rotation bridge (6) comprising receptions spaced behind one another for receiving valve tappets configured as roller tappets (4), one of which tappets is arranged in each reception and is directed with a tappet roller (3) toward a cam (2) of a camshaft (1), the roller tappet (4) of the invention comprises on an outer peripheral surface, raised tappet contours (10, 11) that engage into retention grooves of the bridge (6) within the reception.