Abstract: The invention relates to a clamping device (6) for a traction means (2) of a drive system (1) which produces different pretensioning forces in a first strand (2a) and in a second strand (2b) by means of a turning lever (8, 11), the length ratio between the corresponding inner lever arm (8a, 11a) and the corresponding outer lever arm (8b, 11b) being different.

Abstract: The present invention concerns a clamping roller switch gear (1) whose drive element (10) can be displaced in opposite directions out of an idling, initial position by actuation of a pivoting lever (3). A driven element (coupling ring 15) of the clamping roller switch gear (1) and the drive element (10) define, together with opposing clamping surfaces, wedge-shaped clamping gaps (37, 38) that taper in opposite directions. In these clamping gaps (37, 38) are arranged clamping rollers (39) that, in the initial position of the drive element (10), are kept out of clamping engagement with the clamping surfaces by a first housing-fixed stop (42).

Abstract: The invention relates to a radial-axial roller bearing, having an inner ring (5), coaxially with which an outer ring (4) is disposed, between which rolling bodies (15) roll in order to absorb radial forces, and having cylindrical rolling bodies (17, 18) disposed in cages (19, 20, 24, 25) on both sides to absorb lateral forces, the tracks of which are formed on one side by the end faces of the outer ring (4) and on the other side by a runner plate (8, 9) in each case.

Abstract: In the inventive arrangement of a cover strip (27) on a linear guide, the cover strip (27) is supported through its flat inner surface (32) on a flat support surface (28) of a guide rail (26), which flat support surface delimits a longitudinal groove (25) of the guide rail (26) in inward direction. Two recesses (31) made in the inner surface (32) of the cover strip (27) in the regions of the long sides of the cover strip (27), extend in longitudinal direction and lead to the formation of resilient retaining ledges (33) which serve to fix the cover strip (27) on the guide rail (26).

Abstract: A switchable clamp-type locking mechanism with an output shaft (3) that rotates in relation to a housing (1) is provided. Furthermore, clamping elements, in particular clamping balls or clamping rollers (4) are provided that are pushed by a spring force into a clamping gap (16) in their clamped position and are confined by a smooth track (15) on the housing (1) and by locking ramps (13, 14) on the output shaft (3). A drive shaft (2) to rotate the output shaft (3) is provided. The clamping elements are moved into a release position using a device by means of which the clamping elements are freed to rotate the output shaft (3). A slide (7) that is fixed to the output shaft (3) is form-locked to the housing (1) in the clamped position of the clamping elements and is disengaged from the housing (1) in the release position of the clamping elements.

Abstract: The invention concerns a method of actuating a device for varying the valve timing of an internal combustion engine, said device comprising an element fixed to the camshaft and an element fixed to the crankshaft, which elements are in power-transmitting relationship with each other through at least one hydraulic working chamber formed within the device. When the internal combustion engine has been switched off, the element fixed to the camshaft can be mechanically coupled by a locking element to the element fixed to the crankshaft in a preferred basic position for starting the internal combustion engine. According to the invention, to avoid a jamming of the locking element during starting of the internal combustion engine, the solenoid of the hydraulic valve is at first subjected to a sudden energization with a current of an intensity lower that that required for the central position of the valve piston of the hydraulic valve.

Abstract: A device for the angular adjustment of a camshaft relative to a crankshaft of an internal combustion piston engine, particularly a vane-type adjuster comprising a stator and a rotor arranged coaxially to the stator, vanes of the rotor being pivotable by oil pressure in pressure chambers defined by radial walls of the stator. Fabrication work is reduced compared to stators and rotors made by sinter pressing by the fact that the stator and the rotor are comprised respectively of a stack of stator blanks (2, 2′) and a stack of rotor blanks (3, 3′), said blanks are made preferably by punching and are firmly connected to one another.

Abstract: A linear rolling bearing comprises a guide carriage (46) that is slidably supported through balls (3) on a guide rail (41). The balls (45) are retained in two guide members (47) that are detachably secured to a base body of the guide carriage (46) covering the upper side of the guide rail (41) and are arranged on longitudinal sides of the guide rail (41) that comprise raceways (50). For each endless circuit of balls, the guide members (47) comprise one raceway (51) for load-bearing balls (45), one return channel (48) for returning balls (45) and two deflecting channels that connect the regions of the load-bearing and returning balls (45) to each other. The guide members (47) are made of an elastic material, and the return channel (48) of each guide member (47) comprises an opening (49) that extends over its entire length and has a width that is smaller than the diameter of the inserted balls (45).

Abstract: A tensioning device for a chain (1) comprising a housing (3), said housing (3) carries a first sliding shoe (6) for contact with a first side (7) of the chain (1) with the tensioning device further comprising a tensioning piston (5,23) that is guided on the housing (3) and comprises a second sliding shoe (8,24) for contact with a second side (9) of the chain (1) whereby in an economic and simple-to-manufacture tensioning device, the housing (3) and the first sliding shoe (6) are made in one piece with each other.

Abstract: A device for independent hydraulic actuation of phase and axial positions of a camshaft of an internal combustion engine with a phase adjuster and an actuating piston arranged on a common axis for axial displacement of the camshaft. In order to reduce the space needed and construction expenditure of the device, the phase adjuster also acts as the actuating piston for the camshaft.

Abstract: The invention relates to a needle bearing with an outer ring (1) terminating on both its ends in a collar (2, 3), and with bearing needles (4) guided in a cage in axis parallel disposition, as well as with a lubricant reservoir (9) arranged in the bearing. This bearing is characterized in that the lubricant reservoir (9) is formed by a groove (8), arranged in the outer ring (1), and by a middle part (5) of the bearing needles (4), with the middle part having a reduced diameter in relation to the remaining diameter of the bearing needles (4).

Abstract: A lever-type cam follower (1) of a thin-walled material like sheet metal is proposed. It has a simply structured valve stem guidance in the region of one of its ends (5). The guidance comprises a separate securing element (6) with a basically U-shaped cross-section. A web (9) of the securing element (6) bears against a crossbeam (3) of the cam follower (1) and possesses an opening (11), for example punched, for receiving a valve stem.

Abstract: A tensioner for a power transmission element of a traction drive, includes a housing, a swivel arm having a free end for connection to a rotatable tension roller which rests on the power transmission element, and a swivel bearing, including an axle for connection to the swivel arm and a bushing forming part of the housing and supporting the axle, for rotatably supporting the swivel arm in the housing. A spring is positioned in a peripheral zone of the swivel bearing between the swivel arm and the housing. Mounted in fixed rotative engagement to the axle and supported by the housing via a friction lining is a friction disk, with a disk-shaped first dampening element positioned between the friction lining and the housing.

Abstract: In a switchable support element (1) for a valve train of an internal combustion engine, the lost motion spring (8) of the valve train is made as a torsion spring. This spring is arranged outside of the support element (1) and only the legs and the arms of the spring engage a housing and a head, respectively. In this way, the support element (1) requires no substantially larger design space than non-switchable prior art elements, particularly in axial direction.

Abstract: A rolling bearing cage comprising a first side ring (1) and a second side ring (2) that are connected to each other by crossbars (3) so that pockets (5) for receiving rolling elements (4) are formed, and lubrication grooves (6) extend in axial direction up to said first and second side rings (1, 2) on at least one of peripheral surfaces and bore sections of the crossbars (3) wherein flow channels (7) are arranged in a fractional region of the lubrication grooves (6) and are set back relative to the lubrication grooves (6) in at least one of a radially inward and a radially outward direction. In this way, lubrication of such a bearing is substantially improved.

Abstract: A hydraulic camshaft adjusting device in a rotary piston design, which comprises a drive wheel (2) that is drive-connected to a crankshaft and an impeller wheel (10) connected in a rotationally fixed manner to a camshaft (9), the drive wheel (2) comprising a cavity formed by a peripheral wall (3) and two lateral walls (4, 5), in which cavity at least one hydraulic working space is formed by at least two delimitation walls (7), the impeller wheel (10) has at least one radial blade (13), and with each blade (13) divides a hydraulic working space into two hydraulic pressure chambers, each blade (13) of the impeller wheel (10) is pressed by a spring element (17), by its upper end surface (8) against the peripheral wall (3) of the drive wheel (2) wherein each blade (13) of the impeller wheel (10) can additionally be pressed radially by the compressive force of the hydraulic pressure medium that can be selectively applied to its lower end surface (16), by its upper end surface (18) against the peripheral wall (3) o

Abstract: The invention concerns a device for varying valve timing of gas exchange valves of an internal combustion engine, particularly a hydraulic camshaft adjusting device of a rotary piston type, said device comprising a drive pinion (2) connected in driving relationship to a crankshaft of the internal combustion engine and a winged wheel (3) connected rotationally fast to a camshaft of the internal combustion engine. The drive pinion (2) comprises a hollow space formed by a circumferential wall (4) and two side walls (5, 6), at least one hydraulic working chamber (10) being formed in the hollow space by at least two limiting walls (8, 9). The winged wheel (3) comprises at least one radial wing (12), and with each wing (12) it divides one hydraulic working chamber (10) into two hydraulic pressure chambers (13, 14) which, when pressurized by a hydraulic pressure medium effect a pivoting or a fixing of the winged wheel (3) relative to the drive pinion (2).

Abstract: In a gearshift device (38) of a manual transmission comprising at least one transmitting means (2) that is arranged for pivoting and axial displacement relative to the transmission, a low-friction transmission of gearshift movements is achieved by the inclusion of a rolling bearing (47) taking up thrust loads.

Abstract: A guide roller with a sealing element (14) formed in one piece in a T-shape having a first axial sealing portion (15) that is placed securely onto a shoulder of the inner race, a second sealing portion (16) that extends radially outwardly and is located inside a second groove of the outer race (13), and a third sealing portion (17) that extends radially inwardly branching off from the first sealing portion (15) at its inner end is provided so that axial contact between the shoulder and the outer race (10) is prevented by the third sealing portion (17).

Abstract: A switchable support element (1) requiring only a small design space. For this purpose, a slide (12) that serves to couple an inner element (6) to an outer housing (3) in the support element (1) is positioned laterally in a housing (2) arranged in the cylinder head (5). At the same time, a bore (8) in the inner element (6) for the slide (12) is made as a pocket bore, the housing (2) being seated through an annular extension (11) directly in a bore (9) of the outer housing (3).