Abstract: A tensioning device (2) is provided for a starter generator drive belt of an internal combustion engine and a starter generator (1) equipped with such a tensioning device. It includes a tensioning housing (8, 8a, 8b) with two belt pulleys (6, 7) and a bearing support (9) fastened at the machine housing (3) of the starter generator, on which the tensioning housing is pivotally supported via a friction bearing.

Abstract: A tensioner is disclosed that may be part of a power system where the tensioner provides tension to an endless power transmitting element such as a belt, chain, or other continuous loop. The tensioner has an arm that is rotatable about a first axis. The tensioner also includes an outer spring and at least one inner spring. The outer spring has an outer coil that defines an outer diameter. The inner spring has an inner coil that defines an inner diameter. The inner diameter of the inner coil is less than the outer diameter of the outer coil such that at least a portion of the inner spring is received by the outer spring. The outer spring and the inner spring both urge the arm to rotate about the first axis and into tensioning engagement with the power transmitting element.

Abstract: A tensioning system including a base and an arm pivotally coupled to the base, the arm having an engagement surface thereon. The system further includes a biasing mechanism operatively coupled to the arm to bias the arm relative to the base. The biasing mechanism includes a coil spring having a plurality of coils, at least some of the coils or parts thereof being configured to switch between an activated state and deactivated state based upon a position of the arm relative to the base.

Abstract: A tensioner comprising a base, a shaft connected to the base, an eccentric adjuster coaxially engaged with the shaft, an arm pivotally engaged with the shaft, a pulley journalled to the arm, a torsion spring engaged between the arm and the base, the arm comprising a first receiving portion and a second receiving portion disposed axially opposite from the first receiving portion, a first damping member disposed between the arm and the base, the first damping member frictionally engaged with the base and engaged with first receiving portion, a second damping member disposed between the arm and the eccentric adjuster having a member engaged with the second receiving portion, and a biasing member disposed between the first damping member and the arm for applying a normal force to the first damping member and to the second damping member.

Abstract: A tensioner for a power transmitting element in a drive system is disclosed. The tensioner comprises a threaded shaft that includes threading and at least one non-threaded end and defines a pivot axis, an arm rotatable about the pivot axis on the non-threaded end of the threaded shaft, a torsion element biasing the arm to rotate about the pivot axis, a threaded nut threadedly connected to the threaded shaft. The threaded nut has a first surface in frictional engagement with the arm and is rotatable about the threading. The threaded nut acts as a one-way limited slip clutch to provide asymmetric damping to the arm and controlled resisting torque in a variable relative proportion compared to the mean torque and returning torque.

Abstract: According to aspects illustrated herein, there are provided methods and systems for applying continuous tension on a belt/cable system. The automatic tensioning system includes a pivot mechanism and a locking mechanism. The pivot mechanism includes a pivot arm extending between an idler pulley and a pivot point. The idler pulley is mateable with a belt/cable. The belt/cable is routed about the idler pulley. The idler pulley rotates by the movement of the belt/cable, and the pivot arm pivots in an opposing direction from the belt/cable at the pivot point to apply continuous tension to the belt/cable as the pivot arm pivots. The locking mechanism is in communication with the pivot arm to secure the pivot arm in position, and the locking mechanism is adjustable.

Abstract: A spring, especially for use in a belt tensioning device, with a number of at least 1.25 and at a maximum 2.5 coils, which extend around a spring axis A8, wherein a first coil end 42 has an axial offset Va relative to a first coil region 48, arranged at an angle of 360° around the spring axis A8, and wherein a second coil end 49 has an radial offset Vr relative to a second coil region 50 arranged at an angle of 360° around the spring axis A8. A belt tensioning device and an assembly with such a belt tensioning device include such a spring.

Abstract: What is described is an improved asymmetric damping apparatus which utilizes a flatwire spring to provide both bias in the tensioning direction for a belt tensioner and asymmetric damping against sudden rotational movement of the belt tensioner in the winding direction.

Abstract: In an aspect, a tensioner for an endless drive member, comprising a shaft and base that are mountable to be stationary relative to an engine, a tensioner arm that is pivotable relative to the shaft about a tensioner arm axis, a pulley on the tensioner arm rotatable about a pulley axis that is offset from the tensioner arm axis, and that is engageable with an endless drive member, a bushing that is positioned radially between the pulley and the tensioner arm to support the pulley radially during relative rotation between the pulley and the tensioner arm, a tensioner spring that is positioned to urge the tensioner arm towards a free arm position, a damping element that engages the tensioner arm and that is engaged by a plurality of axially spaced segments of the tensioner spring.

Abstract: In an aspect, a tensioner is provided, comprising a base, a tensioner arm, a tensioner spring, a wheel, and a damping structure. The base is mountable to an engine. The tensioner arm is pivotally connected to the base for movement about a tensioner arm axis. The tensioner spring is connected between the base and the tensioner arm and is positioned to urge the tensioner arm towards a free arm position. The wheel is rotatably mounted to the tensioner arm and is engageable with an endless drive member. A friction surface is provided on one of the base and the tensioner arm. The damping structure is provided on the other of the base and the tensioner arm and engages the friction surface to generate friction during rotation of the tensioner arm. The damping structure includes a sleeve that contains at least one aperture and a damping element that contains at least one lug that engages the at least one aperture with no circumferential clearance therebetween.

Abstract: In one aspect, the invention is directed to a belt tensioner for tensioning a belt, comprising a pivot shaft that is fixedly mountable with respect to an engine block of an engine, a tensioner arm rotatably mounted to the pivot shaft for pivoting about a tensioner arm axis in a first direction and in an opposing second direction, a pulley rotatably mounted to the tensioner arm for rotation about a pulley axis, and a tensioner spring positioned to bias the tensioner arm in the first direction, wherein the tensioner spring has a first end and a second end, wherein the first end is engaged with the tensioner arm, and a micro adjustment mechanism that is operatively connected to control the position of the second end of the tensioner spring so as to control the tension in the tensioner spring.

Abstract: A tensioner is disclosed that may be part of a power system where the tensioner provides tension to an endless power transmitting element such as a belt, chain, or other continuous loop. The tensioner has an arm that is rotatable about a first axis and includes an arm arbor having a window therethrough, a bushing having a protrusion and being positioned adjacent the arm arbor with the protrusion received in the arm arbor's window, and a spring coupled to the arm urging the arm to rotate about the first axis into tensioning engagement with a power transmitting element. The spring is positioned where it can radially expand into contact with the protrusion of the bushing as the arm is rotated in a direction opposite the direction of tensioning engagement such that the bushing is urged radially outward relative to the arm arbor to provide frictional damping.

Abstract: Belt tensioners for a power transmission belt system are disclosed. The belt tensioners have a support member, an arm, a torsion spring operatively coupled therebetween, and an improved damping assembly. The arm includes a housing section pivotally mounted to the support member for rotation about the arm. This housing section has a rub surface against which the damper assembly is seated. The damper assembly has a body having a friction surface frictionally contacting the rub surface of the arm and a damper spring integrated with the body. The improvement of the damper assembly is that the rub surface of the arm includes a trough concentric about the axis of rotation and the friction surface of the body includes an annular protrusion seated in the trough.

Abstract: A belt tensioner for attaching to a generator of an auxiliary unit drive of an internal combustion engine, including a tensioner housing mounted on the generator having a cavity, two tensioning rollers which act with a pretensioning force on the belt in a direction of revolution upstream and downstream of the pulley of the generator, a bow spring which produces the pretensioning force accommodated in the cavity, a circular-arc-shaped tensioning lever mounted in the cavity movable in a plane of the circular arc and which is acted on by the force of the bow springs and supports one of the tensioning rollers, and a sliding bearing for the tensioning lever, which sliding bearing extends at the inlet of the cavity. The tensioning lever has a steel core with an aluminum sheath which completely encloses the part of the steel core which extends outside the cavity and inside the sliding bearing.

Abstract: A belt tensioning device for a belt drive which comprises a driving machine with a driving belt pulley drivable by a driveshaft around a driving axis, and a plurality of further belt pulleys and with an infinite belt which is wrapped around the driving belt pulley and the further belt pulleys wherein the belt tensioning device comprises a housing in which two tensioning arms are supported so as to be pivotable around a common pivot axis, in which tensioning arms there are supported tensioning rollers with axes of rotation extending parallel to the driving axis, wherein the tensioning arms are supported relative to one another by spring means, wherein, with the driving belt pulley mounted at the driving machine, the housing can be mounted in that, in an annular region surrounding the driveshaft of the driving belt pulley, the housing is contact-free relative to the driving machine.

Abstract: A mechanism for adjusting tension of a belt of a bicycle includes a link pivotably connected between an arm and a frame. The arm has a tension adjustment bolt connected to one end thereof and the frame has a guide wheel connected thereto. An extension spring is between the arm and the frame. The link, the arm, the extension spring and the frame form a four-link mechanism is cooperated with the extension spring to allow the guide wheel to consistently press the belt to keep the belt with a proper tension. When the bolt is unscrewed, the whole mechanism is moved downward from the belt so that the replacement of the rear wheel and the belt is easy and convenient.

Abstract: A belt system comprising a driver pulley, a driven pulley, a belt trained between the driver pulley and the driven pulley, a belt tensioning device engaged with the belt, a first idler engaged with the belt between the driver pulley and the driven pulley, a second idler engaged with the belt, the second idler engaged with the belt span immediately upstream of the driver pulley, the second idler comprising an arm journalled to a base, the arm urged to load the belt by a torsion spring, the arm having an effective length of less than 6 mm, and the torsion spring having a spring rate of approximately 0.128 mm/deg.

Abstract: A tensioner comprising a sleeve, an adjuster cooperatively engaged with an inner surface of the sleeve, a pivot arm pivotally engaged with the sleeve, a pulley journalled to the pivot arm, a torsion spring engaged with the sleeve for urging the pivot arm, an elastomeric damping ring connected to the arm and in compressive frictional contact between the sleeve and the arm whereby a tangential friction force damps a pivot arm movement, the elastomeric damping ring exerting a radial force on the sleeve, and a retaining member connected to the adjuster and cooperatively engaged with the sleeve whereby the adjuster and sleeve are kept in a predetermined relation.

Abstract: A tensioner for tensioning a belt that includes a support housing, an arm pivotably attached to the support housing, a spring operatively connected to the support housing and the arm, and a deflectable armplate seated on the arm and deflected into engagement with the support housing to provide an axial force that clamps the arm and the support housing together without axially compressing the spring. The spring biases the arm to pivot relative to the support housing.

Abstract: A tightener for a belt drive cooperates with the belt in the presence of oil, and has a pin with a first axis; a base plate integral with and substantially perpendicular to the pin; a cam arm connected in a rotary manner to the pin and movable with respect to the base plate; a contact member carried by the cam arm; and an elastic member connected to the cam arm to activate the contact member against the belt. The tightener also has a friction member made of oil-resistant material and axially supporting the cam arm on the base plate; and axial elastic means for loading the friction member against the base plate.

Abstract: Aspects of the present disclosure relate generally to limiting the use of an autonomous or semi-autonomous vehicle by particular occupants based on permission data. More specifically, permission data may include destinations, routes, and/or other information that is predefined or set by a third party. The vehicle may then access the permission data in order to transport the particular occupant to the predefined destination, for example, without deviation from the predefined route. The vehicle may drop the particular occupant off at the destination and may wait until the passenger is ready to move to another predefined destination. The permission data may be used to limit the ability of the particular occupant to change the route of the vehicle completely or by some maximum deviation value. For example, the vehicle may be able to deviate from the route up to a particular distance from or along the route.

Abstract: A tensioner for tensioning flexible drives employs an extruded shaft which can provide a relatively complex cross sectional shape to provide anti-rotation features to inhibit rotation of a pivot bushing located on the shaft. The pivot bushing has a frustoconical outer shape, as does the pivot surface of the hub of the tensioner arm which pivots on the pivot bushing. A dampening spring urges the pivot bushing towards the tensioner arm's pivot surface, providing for wear compensation and for dampening. The degree of dampening which is generated between the pivot bushing and the tensioner hub can be selected in a variety of manners: by varying the spring force; by changing the effective contact surface area between the pivot bushing and pivot surface; and/or by changing the coefficient of friction between the pivot bushing and the pivot surface.

Abstract: The belt of a pump jack connects an output pulley of a motor and an input drive pulley of the transmission and is tensioned by an idler roller with end flanges which is spring tensioned into engagement with the belt. The idler roller is carried on a base frame adjustable longitudinally and transversely to the belt on a concrete support base. An upstanding support is carried on the base frame including a platform carrying bearings for a pivotally mounted arm extending to the roller for supporting the roller axis transverse to the belt and a spring connects to the arm for applying a force to the arm to press the roller against the belt. The upstanding support and the pivotally mounted arm are all arranged one side of the idler roller so as to present the idler roller to the belt from one side of the belt.

Abstract: A tensioning device for a traction element, such as a belt, band or chain, is provided having a tensioning arm (1) arranged on a machine part on which an idler pulley or deflection pulley for the traction element is rotatably mounted via a roller bearing (2), and includes a protective cap (15) which is in a frictionally locking or positively locking manner on the idler pulley and covers the bearing region of the idler pulley. The idler pulley is a sheet-metal sheave (16) and includes, for securing the protective cap (15), a snap-in groove (17) which is formed in an end region of the sheet-metal sheave (16) which has an outwardly conical shape, with the end region having a thickness (A) which is less than a thickness (E) of the sheet metal of the sheet-metal sheave (16).

Abstract: A tensioner includes a movable member, a fixed member, biasing means provided between the fixed member and the movable member and configured to bias the movable member along a pressing direction, and a damping member provided between the fixed member and the movable member and configured to damp the pivoting movement of the movable member. The damping member is made of a resin composition whose sliding friction force damps the pivoting movement of the movable member, and a contact angle between the resin composition and water is 70° to 100°, both inclusive.

Abstract: A tensioner assembly includes a pulley arm pivotable about a pivot shaft, and a tension pulley mounted on the pulley arm at its end remote from the pivot shaft and pressed against a belt to keep the tension of the belt. The tension pulley is rotatably mounted around a base portion of the pulley arm through a rolling bearing with the inner surface and axial rear end surface of the bearing inner race in contact with the outer peripheral surface of the base portion and an end surface of a shoulder of the base portion, respectively. The base portion has an axial through hole formed with an internal thread on its inner surface. A support bolt is threaded into the through hole from the axial front end to press the rolling bearing against the end surface of the shoulder. The internal thread has an axial front end located in the vicinity of, or axially rearwardly of, the end surface of the shoulder.

Abstract: A tensioner is disclosed that may be part of a power system where the tensioner provides tension to an endless power transmitting element such as a belt, chain, or other continuous loop. The tensioner has an arm that is rotatable about a first axis and includes an arm arbor having a slot therethrough, a bushing having a protrusion and being positioned adjacent the arm arbor with the protrusion received in the arm arbor's slot, and a spring coupled to the arm urging the arm to rotate about the first axis into tensioning engagement with a power transmitting element. The spring is positioned where it can radially expand into contact with the protrusion of the bushing as the arm is rotated in a direction opposite the direction of tensioning engagement such that the bushing is urged radially outward relative to the arm arbor to provide frictional damping.

Abstract: A tensioner having a closing-type torsion spring that is employed to bias a pivot arm about a pivot shaft. The tensioner includes a damper that continuously contacts an inside surface of the torsion spring to dampen torsional vibration transmitted through the torsion spring.

Abstract: A drive belt tensioner assembly for a motor-generator unit is comprises a motor-generator unit having a rotatable drive pulley, configured to engage a drive belt, extending therefrom. A drive belt assembly housing is fixed to the motor-generator unit and has an inner surface defining an opening through which the rotatable drive pulley of the motor-generator unit extends. A tensioner mounting ring is mounted to, and rotatable with respect to, the drive belt assembly housing. A tensioner pulley is mounted for rotation on the tensioner mounting ring and is configured to engage the drive belt on a side of the motor-generator unit drive pulley. A biasing assembly having a first end mounted to the tensioner mounting ring and a second end mounted in a fixed relationship to the motor-generator unit exerts a biasing force on the tensioner mounting ring to rotate the ring and the tensioner pulley against the drive belt.

Abstract: The aim of the invention is to improve a belt tensioner for a belt drive of an internal combustion engine, having a central bearing device which serves to define a pivot axis for the belt tensioning arm, and having a bearing sleeve which is connected to the tensioning arm, wherein the bearing device extends through the bearing sleeve and the bearing sleeve is mounted in a friction-damping manner by means of a plain bearing arrangement, so as to be pivotable about the bearing device, with said improvement being such that a good function of the belt tensioner is maintained despite a simplification of the design and a reduction in differently designed parts. Said problem is solved by means of a generic belt tensioner for a belt drive of an internal combustion engine, in which the plain bearing arrangement has at least two opposite sliding faces which have the same material.

Abstract: A pulley assembly operable in connection with a tensioner assembly is provided for tensioning a belt. The pulley assembly includes one or more elements for sealing the pulley to protect the pulley assembly in harsh environments. For instance, the pulley assembly may include one or more shields for protecting the pulley from contaminants entering the interior of the pulley assembly that can lead to premature failure.

Abstract: A hydraulic damper for providing fluid damping to a tensioner in a drive system that includes a damper cup, which is mounted to the tensioner and configured to rotate about a central axle in tandem with the tensioner, an end plate having an outer face and an inner face, which is attached to the damper cup forming a fluid chamber, a pin attached to the end plate and extending away from the inner face and toward the damping cup, a damping fluid, which is contained within the fluid chamber, a rotatable plate having an opening configured to accept the pin through the rotatable plate and rotate about the central axle, and a fixed plate having an opening configured to accept the pin through the fixed plate, which is fixed to and does not rotate about the central axle. During wind-up and tensioning of the tensioner, a shear force is applied to the rotatable plate moving through the damping fluid to provide damping to the tensioner.

Abstract: Actuating device for a recirculation pump of a cooling circuit of an internal combustion engine comprising a pulley suitable for being rotationally driven by the engine, a driven shaft for driving the pump and an electromagnetically controlled coupling interposed between the pulley and the driven shaft, in which the electromagnetic coupling comprises an electromagnet, coupling mechanism controlled by the electromagnet and mobile between an engagement position in which the pulley is connected to the driven shaft and a disengagement position, and an elastic member for maintaining an engagement member in the engaged position when the electromagnet is not energized.

Abstract: A belt tensioner for a starter generator drive is provided. The belt tensioner comprises a carrier having a pivot defining a first pivot axis at a first end and a carrier arm extending from the pivot to terminate in a second end. An idler pulley is rotatably mounted to the carrier for rotation about the first pivot axis and a tensioner pulley is rotatably mounted to the carrier at the second end of the carrier arm for rotation about a second axis. The second axis extends parallel to and is arcuately moveable relative to, the first pivot axis. A tensioner is in communication with the second end of the carrier arm for biasing the carrier arm and the tensioner pulley against a drive belt for tensioning the drive belt engaged by the idler pulley and the tensioner pulley.

Abstract: A novel tensioner for use with flexible drives, such as serpentine accessory belts on automobiles includes a tensioner arm to spindle pivot design which employs a frustoconical bushing between an inner pivot surface of the tensioner arm and a spindle shaft. The frustoconical design of the bushing resists off axis movement of the tensioner arm and a wear take up mechanism biases the bushing into contact with the inner pivot surface to compensate for normal wear of the bushing and/or pivot surface. A thrust plate is mounted to the end of the spindle shaft and rides in a thrust washer, the thrust plate and thrust washer being held captive in the tensioner arm such that the tensioner arm can pivot about the bushing and the spindle and the thrust plate and thrust washer assist in inhibiting off-axis movement of the tensioner arm. In one embodiment, the biasing force which biases the bushing against the inner pivot surface of the tensioner arm can be varied to change the amount of dampening of the tensioner.

Abstract: A tensioning device for a belt or chain drive with a tensioning lever (2) which is provided with a rotatable tension roller (6) mounted rotatably a drag bearing (3) constructed as a plain bearing on a base housing (4), and radially at a distance from the axis of rotation (5) of the drag bearing (3); with a pretensioned torsion spring (11), which is constructed as a helical spring (12, 12?), disposed coaxially with the drag bearing (3) and connected at the spring ends (13, 14) thereof at the housing side to the base housing (4), and at the lever side to the tensioning lever (2); and with a brakeshoe (16, 16? 29) which is disposed at one spring end (13, 14) and which can be pressed by the spring end against a component which can rotate about the axis of rotation (5) of the drag bearing (3) relative to the spring end (13, 14).

Abstract: A tensioning system including a base and an arm pivotally coupled to the base, the arm having an engagement surface and being configured to pivot relative to the base about a pivot axis. The system further includes a biasing mechanism operatively coupled to the arm to bias the arm relative to the base, and a seal assembly sealingly positioned between the arm and the base. The seal assembly is coaxial with the pivot axis and configured to accommodate relative axial movement between the base and the arm and relative radial movement between the base and the arm while still maintaining a seal therebetween.

Abstract: A tensioner may be part of a power system to tension an endless power transmitting element. The tensioner includes an arm having an arm arbor with a slot therethrough that is rotatable about a first axis, a bushing having a sleeve that includes a cut-out and a removable sleeve-segment that has a protrusion thereon, the sleeve-segment being receivable in the cut-out with the protrusion in the slot, and a spring coupled to the arm for rotation of the arm about the first axis into tensioning engagement with a power transmitting element. The spring is positioned where it can radially expand into contact with the protrusion of the bushing, at least the protrusion on the sleeve-segment, as the arm is rotated in a direction opposite the direction of tensioning engagement such that the bushing is urged radially outward relative to the arm arbor to provide frictional damping.

Abstract: A tensioning system including a base and an arm pivotally coupled to the base, the arm having an engagement surface thereon. The system further includes a biasing mechanism operatively coupled to the arm to bias the arm relative to the base. The biasing mechanism includes a coil spring having a plurality of coils, at least some of the coils or parts thereof being configured to switch between an activated state and deactivated state based upon a position of the arm relative to the base.

Abstract: A tensioning system including a body having a base and an engagement surface pivotally coupled to the base. The system further includes a biasing mechanism operatively coupled to the engagement surface to bias the engagement surface relative to the base, and a locating device coupled to the body. The locating device is configured to rotationally position the tensioning system, and the locating device has an adjustable effective length.

Abstract: A tensioning device for a flexible driving means, in particular a chain tensioner for a timing chain of an internal combustion engine, with a housing, a tensioning piston guided in a piston bore of the housing and a latching element arranged outside on the housing, is provided. A latching profile is provided on the front region of the tensioning piston in the tensioning direction. The latching element has at least one spring arm protruding over the housing in the tensioning direction, which engages the latching profile of the tensioning piston outside of the housing. The latching element for the delimitation of the free working range between a front end-stop and a rear end-stop in and against the tensioning direction is arranged movably on the housing.

Abstract: A tensioner in accordance with the present invention employs a spindle and a tensioner arm which are preferably manufactured by a suitable manufacturing process, such as die casting, negating a requirement for machining operations. The biasing spring of the tensioner is wound with wire having a non-circular cross section to increase the spring force of the spring compared to a similar spring wound with wire of circular cross section and, as the tensioner arm is moved away from the flexible drive, the diameter of the biasing spring expands and the coils press a dampening shoe into contact with a wall of the tensioner arm producing a dampening force. The tensioner is simple to assemble and requires a relatively small package volume for the biasing force it can produce.

Abstract: A belt tensioner includes an arm, a spring case, and a helical spring having inwardly projecting first and second end portions. Another belt tensioner includes a spring, an arm, a spring case, and a pivot bushing surrounding the spring. An additional belt tensioner includes an idler pulley having a bearing with a mounting hole and includes an arm having a post. The post is positioned in the mounting hole, and an annular rim of the post is deformed radially outward and over the bearing. A method for manufacturing an arm and a spring case of a belt-tensioner includes obtaining a belt-tensioner-arm casting mold including a first section and a second section and obtaining a belt-tensioner-spring-case casting mold including a first segment and a second segment.

Abstract: A belt tensioner includes a support housing at least in part defining a spring cavity and an arm pivotally attached to the support housing. A spring is located in the spring cavity and is operatively connected to the arm and the support housing to bias the arm about a pivot axis toward an unloaded position relative to the support housing. A damping member includes a hub and deflectable, force-applying elements that are connected to and spaced apart about a periphery of the hub. The force-applying elements are biased toward a contact surface of the arm to apply a frictional force between the contact surface and the force-applying elements to impede rotation of the arm relative to the support housing.

Abstract: A tensioner for an endless power transmitting element in a drive system is disclosed that includes an arm rotatable about an axis and having a sleeve that includes a ramp face or contoured face, a damper cup having a protrusion and a plate, a spring case that houses the sleeve of the arm and the damper cup with the damper cup's plate mated with the ramp face or contoured face of the sleeve. During wind-up of the tensioner, a normal force is applied to the damper cup's protrusion that moves the plate along the ramp face or contoured face in a first direction, and in the first direction the ramp face or contoured face pushes the damper cup generally radially outward into the spring case to provide frictional damping.

Abstract: A clamping device (1) of a traction mechanism drive, comprising a fixedly positioned base part (2), with which a pivot arm (3) is associated. The pivot arm (3) can be pivoted via a rotary bearing, consisting of a hub (9), a pin (5) of the base part (2) and a sliding bearing (10). A spring means (12) inserted between the base part (2) and the pivot arm (3) exerts an expansion force and effects a non-positive support of a tensioning roller (11) that is connected to the pivot arm (3) on a traction mechanism. In order to damp adjusting movements of the pivot arm (3), a damping device (13) is provided, which comprises two separate spring-loaded friction elements. For this purpose, a friction disk (14) is supported with form fit on the supporting disk (8) connected to the pin (5) of the base part (2) and with friction fit on the pivot arm (3).

Abstract: A rotary belt drive tensioner including a damping mechanism decoupled from the torque output and pulley alignment of the tensioner such that the damping force and the torque output may be independently variable. The damping mechanism includes a shoe plate and at least one shoe set includes a damping shoe and a shoe spring. The shoe plate is operatively attached to one of the arm and the base, and the shoe spring exerts a radial load on the damping shoe in sliding engagement with the other of the arm and the base to generate a flexible damping force. In one embodiment, the rotary belt drive tensioner includes a damping mechanism containing three damping shoe sets positioned generally equidistant from each other on the shoe plate.

Abstract: A tensioning device (2) is provided for a starter generator drive belt of an internal combustion engine and a starter generator (1) equipped with such a tensioning device. It includes a tensioning housing (8, 8a, 8b) with two belt pulleys (6, 7) and a bearing support (9) fastened at the machine housing (3) of the starter generator, on which the tensioning housing is pivotally supported via a friction bearing.

Abstract: A tensioner for a belt, a chain or the like, which has a tensioning lever that is in operative connection with a helical spring, is pivotable about a fixed axis and on the tensioning lever a receptacle for a tensioning element that bears against the belt, chain or the like is arranged. The helical spring is held at its ends by spring receptacles with the helical spring being screwed to at least one of the spring receptacles. This construction ensures a reliable and easy-to-assemble connection between the helical spring and the spring receptacle is achieved.

Abstract: What is described is an improved asymmetric damping apparatus which utilizes a flatwire spring to provide both bias in the tensioning direction for a belt tensioner and asymmetric damping against sudden rotational movement of the belt tensioner in the winding direction.