Abstract: A switchable cam follower, comprising two relatively movable, e.g., telescopable, units which can be connected via a coupling which engages over a dividing face between the units such that there is a large valve stroke. It is possible to generate no valve stroke or a small valve stroke if the coupling does not engage. At least one spring, which can be loaded compressively or torsionally, acts as a lost motion spring between the units. A compression limiting device impedes movement of the lost motion spring to the blocked position. In an incorrect switching operation in which the coupled units move undesirably toward each other and in a sudden manner under the influence of a valve spring force, movement of the spring into the “blocked” position to become seated is prevented by the limiting device.

Abstract: A reverse spring hydraulic valve-lash-adjusting element for the valve train of an internal combustion engine having a plunger (1), in the plunger head (2) of which a control valve (5) is arranged, this control valve (5) controlling a central axial bore (6) which connects a low-pressure space (4), arranged above the plunger head (2), to a high-pressure space (3) arranged below the plunger head (2), the control valve (5) having a valve-closing body (7) which is loaded in the opening direction by a valve-body spring (17) and as a result passes from a cylinder-ring-shaped sealing surface (8) arranged on the plunger head (2) to a travel-limit surface (9) of a center piece (24), whereas the closing of the control valve (5) is effected by displacement of oil from the high-pressure space (3) into the low-pressure space (4) wherein the valve-closing body (7) reaches the sealing surface (8) on a linear path without lateral movement or rotation of said valve-closing body (7) by virtue of the fact that a circular-cylindr

Abstract: A tensioner for a traction drive to maintain a belt under tension includes a base part and a pivot arm connected to the base part for swinging about a rotation axis and having a free end for rotatable arrangement of a roller which is supported on the power transmitting member. A torsion spring acts on the pivot arm for urging the roller against the belt and applies an axial force on a damping unit for damping an adjusting movement of the pivot arm. The damping unit includes a slitted friction bushing constructed to have a wedge ring with conical inner and outer surfaces for formfitting engagement in a circular ring shaped recess of the base part or the pivot arm. The recess has contact surfaces to complement the inner and outer surfaces of the friction bushing for formation of two conical contact zones.

Abstract: The invention proposes a cup tappet (1) of a valve train of an internal combustion engine, said cup tappet (1) comprising a hollow cylindrical skirt (3) closed at one end by a bottom (2), said bottom (2) comprising an outer end surface (4) and an inner end surface (6), said outer end surface (4) comprising a contact surface (5) for a cam and said inner end surface (6) comprising a central support (7) for a gas exchange valve, wherein the inner end surface (6) of the bottom (2) comprises a radially extending flat web (8), the support (7) is arranged symmetrically between edges (9, 19) of the web (8), a leg (11, 12) sloping away from the bottom (2) after the manner of a roof extends from each edge (9, 10) up to an inner surface (13) of the skirt (3), and the legs (11, 12) are situated axisymmetrically opposite each other. This cup tappet (1) thus possesses a particularly good rigidity.

Abstract: A displacement joint includes an outer joint part having circumferentially spaced recesses to form tracks. A tripod is mounted in fixed rotative engagement to a driveshaft and includes a tripod spider which has spherical arms spaced circumferentially in symmetric disposition for engaging the recesses. Roller bearing assemblies are fitted in the outer joint part to support the tripod arms, with each tripod arm guided by two roller bearing assemblies. Each roller bearing assembly has a bearing shell, which receives the tripod arm, rolling members fitted with clearance in a cage and disposed between the track of the outer joint part and a contact surface of the bearing shell. The cage is guided by shoulders of the outer joint part, which laterally bound the track, wherein the cage has opposite collars in parallel relationship to the shoulders for providing an axial stop for the rolling members and the bearing shell.

Abstract: A parking lock (1) of a transmission comprises a parking lock wheel (2) that is rotationally fixed relative to a shaft (25) and a locking ring (3) that is rotationally fixed relative to a housing (24), the locking ring (3) can be displaced axially into a positive locked connection with the parking lock wheel (2) by an engaging element (4) and can be released from the locked connection by a hydraulically actuated release element (6).

Abstract: The invention concerns a hydraulic valve (1) that comprises an electromagnet (2) having an armature (3), and a valve part (4) having at least two valve seats (5, 6). The electromagnet (2) is formed by a hollow cylindrical plastic coil spool (8), a coil winding (10) received in the coil spool (8) and a magnet housing (11) surrounding the coil winding (10), the hollow cylinder of the coil spool (8) being configured as an armature space (14) for the armature (3), into which armature space (14) an upper pole (15) and a lower pole (16) of the electromagnet (2) extend. The valve part (4) is formed by a hollow cylindrical valve housing (18) that comprises a pressure delivery connection (P) on one front end, as well as a load connection (A) and a tank connection (T) arranged on its peripheral surface and, pressed into its hollow cylinder, two cup-shaped deep-drawn parts (23, 24) comprising the valve seats (5, 6).

Abstract: A freewheel having inner and outer machine parts which are rotatable with respect to one another about an axis. One machine part has a smooth cylindrical clamping track, and the other machine part is provided on its circumferential face facing the smooth cylindrical clamping track with clamping ramps arrayed in the circumferential direction. A metallic cage has a series of profiled transverse webs positively locked for preventing rotation with respect to the other machine part. The cage has a central web section that extends parallel to the axis of the freewheel and is connected to two obliquely extending connecting web sections at the ends of the central section. Each oblique web section is connected to an outer web section which also extends parallel to the axis.

Abstract: A multi-part synchronizing ring (1) of a synchronization device with an annular base body (2) and with at least one friction surface (19) on the base body (2), as well as with teeth (3) pointing outwards, has at least one driver element (4, 5), wherein the driver element (4, 5) is formed on an annular disk (6) separate from the base body (2).

Abstract: A bearing arrangement (1) for pivotable mounting of a shift lever (2) by a casing (10) in a housing (3) that provides a tilt axis (9a) and a pivot axis (8a) for the shift lever (2). The tilt axis (9a) and the pivot axis (8a) are mutually spaced apart.

Abstract: A switch element (1) is proposed for valve shut-off, fabricated as cam follower for a plunger rod valve drive of an internal combustion engine, having an outer part (2) and an inner element (4) axially movable in its bore (3) and with rotational security (15) relative to the guided inner element (4). The outer part (2), inside the bore (3), has an annular groove (6), and the inner element (4) has a radial bore (7) with two diametrically opposed pistons (8), which to couple the elements (2, 4) in their axially remote relative position achieved by a lost-motion spring (5) are displaceable towards the annular groove (6). On their cam-side under side, emanating from their radially outward, bulbous face, the pistons (8) segmentwise comprise a plane transverse surface as contact area for a facing under side (27) of the annular groove (6). The latter is intersected by two diametrically opposed oil ports (11) running offset 90° from the pistons (8) in circumferential direction.

Abstract: In a linear rolling bearing comprising a guide carriage (1) that can be mounted through rolling bearing rollers (7) on a guide rail (2), said guide carriage (1) comprising at least one endless roller channel (8) for the rollers (7), said roller channel (8) comprising a load-bearing channel (9) for load-bearing rollers (7), a return channel (10) for returning rollers (7) and two deflecting channels (11) that connect the load-bearing channel (9) and the return channel (10) to each other, said guide carriage (1) further comprising a carrier body (3) in which said return channel (10) and said load-bearing channel (9) are arranged, and, on two front ends of the carrier body (3), end members (4) in which said deflecting channels (11) are arranged, said return channel (10) comprising a return tube (27) whose tube ends are connected to said end members (4), and said roller channel comprising raceways for the rollers and side surfaces for laterally delimiting the roller channel, the return tube (27) comprises tongues

Abstract: A tensioner for a chain, includes a tensioner piston bearing upon a chain and guided by a cylinder for movement in the direction of the chain. The cylinder and the piston define a pressure chamber for receiving hydraulic fluid, wherein hydraulic fluid is able to escape from the pressure chamber via a leakage gap. A control member is provided to at least reduce the leakage gap in size, when a pressure in the pressure chamber increases.

Abstract: Method for the production of a spindle nut (3) of a spherical thread drive mechanism, whereby the spindle nut (3) has at least one screw-shaped track (4) formed as a single piece on its inner circumference, whose threads (38) are limited by shoulders (6). The shoulder (6) is interrupted by a deflecting recess (23) at at least one deflecting position, in order to deflect balls (13) out of one thread into an adjacent thread (38). The method includes locating a tool arbor (56) in a hollow blank (57), whereby the tool arbor (56) has on its outer circumference a counter profile of the screw-shaped track (4) and a projecting part (59) for each deflecting recess.

Abstract: The invention relates to a camshaft adjuster (1) for adjusting and fixing the relative position of the angle of rotation of a camshaft (8) in relation to a crankshaft of a reciprocating piston internal combustion engine. The adjusting device comprises a high transmission and friction-reduced adjusting gear mechanism (2), comprising a drive shaft which is rotationally fixed to the crankshaft, a driven shaft which is rotationally fixed to the camshaft (8) and an adjusting shaft (9) which is connected to an adjusting motor shaft (10) of an adjusting motor. A camshaft adjuster (1), which is economical to run, can be produced such that the adjusting gear mechanism (2) and the adjusting motor (3) are embodied as separate units and are connected together by a rotational backlash-free, disengaging coupling (4).

Abstract: A thrust washer (9) for planet gears (6) of a planetary gearbox is provided that is made form a tempered, cold rolled strip having a flatness less than or equal to 0.03 mm, and a hardness ranging from 370 to 580 HV. The thrust washer (9) can be produced in a particularly cost effective manner by making it from an appropriate initial stock having the desired final properties.

Abstract: A planet carrier (2) for a gearbox is provided, especially for an automatic transmission or a power-shift gearbox. The planet carrier (2) includes at least one planet gear (4) that is in constant contact with a sun gear and an internal geared wheel. The planet carrier (2) is formed from two parts and includes a single piece flange part (11) and a single piece cup body (12) formed in a step-type manner. The two components are rotationally symmetrical or approximately rotationally symmetrical, and are arranged with one at least partially inside the other. The internal diameter of the external part is adapted to the internal diameter of the internal part in an overlapping area. The two components are connected together at contact points. The components are positioned in a precise manner in relation to each other in the axial, radial and peripheral directions based on the construction. The individual components can be produced in a simple and economical manner through deep drawing.

Abstract: Clamping device, especially for a steering column, with a first ramp plate, which can rotate relative to a second ramp plate between a released position and a clamped position by changing a distance between the ramp plates is provided. The first ramp plate (2) and the second ramp plate (3) each have at least two lifting ramps (5, 6) arranged in the circumferential direction for roller bodies and at least one guiding recess, and more preferably two diagonal guiding recesses (9, 10), in the plane of the ramp plates (2, 3) for control elements. The lifting ramps (5, 6) and the guiding recesses (9, 10) of the first and the second ramp plate (2, 3) are arranged so that they operate in opposite directions relative to each other. The roller bodies and the control elements are held in recesses (8) of a holding element (4) arranged between the ramp plates (2, 3).

Abstract: Roll stabilizer for the chassis of a motor vehicle having an actuator (3) arranged between stabilizer halves (1, 2) and rotating them relative to one another around a rotational axis, when necessary. The actuator (3) is provided with a failsafe device (34), which connects the two stabilizer halves (1, 2) in a torque proof manner, when necessary.

Abstract: The invention proposes a valve train of an internal combustion engine comprising a cam (1) and a directly driven cam follower (2), such as a roller tappet. This valve train is additionally designed for effecting an internal exhaust gas recirculation at an exhaust valve. A housing (4) of the cam follower (2) comprises two relatively displaceable elements (8, 9). The cam (1) is configured as a high lift cam (1a) for the inner element (8), and at least one low lift cam (1b) configured out-of-phase to the high lift cam (1a) is provided for the outer element (9). When it is desired to carry out an internal exhaust gas recirculation, the two elements (8, 9) are coupled to each other by a coupling element (10), so that, at the end of the base circle of the high lift cam (1a), the low lift cam (1b) protruding thereinto enables a slight post-opening of the gas exchange valve concerned and, thus also, an exhaust gas recirculation.