Abstract: A hydraulic tensioning device for a chain drive of an internal combustion engine, having a receptacle and having a tensioning piston which is guided in displaceable fashion in a cylindrical hollow space of the receptacle and which has a piston hollow space, wherein the piston hollow space together with the cylindrical hollow space of the receptacle forms a pressure chamber, and having a pressure relief valve unit arranged in the piston hollow space. The pressure relief valve unit is a preassembled structural unit and comprises a spring, a closing body and a valve seat and also a valve receptacle which surrounds the valve seat in a first subsection, wherein the valve receptacle forms an interference fit with the valve seat, and wherein the valve receptacle or the valve seat in a second subsection form an interference fit with the inner shell surface of the tensioning piston.

Abstract: A device for tensioning a roller chain in a chain drive system is disclosed. The device includes a floating shoe with a surface upon which the chain may slide and a housing. A tension force provided by a tension mechanism is directed from the housing to the floating shoe in an outward direction with respect to the path of the roller chain. A retention feature limits the distance the floating shoe may travel with respect to the housing.

Abstract: A tensioning device (1) for tensioning a traction mechanism of a traction mechanism drive, including a housing (2), a piston (3) that is mounted such that the piston can be displaced in an axial direction inside the housing (2), and a transport securing element (4), which in at least one transport position of the tensioning device (1) is arranged in the housing (2) transversely to the piston (3) and in abutment with the piston (3) such that a displacement of the piston (3) in at least one first axial direction is blocked. The transport securing element (4) is provided with a support portion (5), wherein in the transport position at least one first web area (6) of the support portion (5) is in abutment with one end face (7) of the piston (3), and an additional web area (8) of the support portion (5) extending in an axial direction away from the first web area (6) is supported in the housing (2), at least in a radial direction.

Abstract: A device for tensioning a roller chain in a chain drive system is disclosed. The device includes a floating shoe with a surface upon which the chain may slide and a housing. A tension force provided by a tension mechanism is directed from the housing to the floating shoe in an outward direction with respect to the path of the roller chain. A retention feature limits the distance the floating shoe may travel with respect to the housing.

Abstract: A hydraulic tensioning device for a chain drive of an internal combustion engine, having a receptacle and having a tensioning piston which is guided in displaceable fashion in a cylindrical hollow space of the receptacle and which has a piston hollow space, wherein the piston hollow space together with the cylindrical hollow space of the receptacle forms a pressure chamber, and having a pressure relief valve unit arranged in the piston hollow space. The pressure relief valve unit is a preassembled structural unit and comprises a spring, a closing body and a valve seat and also a valve receptacle which surrounds the valve seat in a first subsection, wherein the valve receptacle forms an interference fit with the valve seat, and wherein the valve receptacle or the valve seat in a second subsection form an interference fit with the inner shell surface of the tensioning piston.

Abstract: A tensioning device (1) for tensioning a traction mechanism of a traction mechanism drive, including a housing (2), a piston (3) that is mounted such that the piston can be displaced in an axial direction inside the housing (2), and a transport securing element (4), which in at least one transport position of the tensioning device (1) is arranged in the housing (2) transversely to the piston (3) and in abutment with the piston (3) such that a displacement of the piston (3) in at least one first axial direction is blocked. The transport securing element (4) is provided with a support portion (5), wherein in the transport position at least one first web area (6) of the support portion (5) is in abutment with one end face (7) of the piston (3), and an additional web area (8) of the support portion (5) extending in an axial direction away from the first web area (6) is supported in the housing (2), at least in a radial direction.

Abstract: A preassembled traction mechanism drive having at least two drive wheels (1, 2) around which an endless traction mechanism (3) is wrapped, and a tensioning device (6) that has a housing (4) and is supported on the internal side of the endless traction mechanism (3). In the housing (4), at least two fixation elements (5) are provided that are fixedly connected to the housing (4) and that fix the drive wheels (1, 2), around which the endless traction mechanism (3) is wrapped, at an operational distance from one another.

Abstract: A tensioning device for a traction mechanism drive. The tensioning device includes a tensioning piston which is mounted in an axially movable manner and provided with an attachment shaft facing the traction mechanism. The tensioning device also includes a tensioning shoe formed of a polymer plastic and mounted on the attachment shaft via a support hole, and a disk-shaped metallic support element which is fixed to the attachment shaft via its support hole. The force transmission between the tensioning shoe (2) and the tensioning piston (5) is improved by pre-mounting the support element (11) in or on the tensioning shoe (2) in a positively or non-positively fixed manner, and the support element (11) is connected to the tensioning piston (5), in the mounted state, via a press fit between the support hole (12) and the attachment shaft (4), and contacts a shoulder (9) of the tensioning piston (5).

Abstract: A tensioning device for compensating for elongations of the traction mechanism, in particular a chain or a timing belt, of a power transmission drive, in particular on an internal combustion engine, having a tensioning mechanism, in particular a tensioning rail, a sliding shoe or tensioning arm having a tensioning roller. A tensioning element is disposed between a support surface on the tensioning mechanism and a support, in particular on the internal combustion engine, and the support surface on the tensioning mechanism is made of a material which has a high strength.

Abstract: A preassembled traction mechanism drive having at least two drive wheels (1, 2) around which an endless traction mechanism (3) is wrapped, and a tensioning device (6) that has a housing (4) and is supported on the internal side of the endless traction mechanism (3). In the housing (4), at least two fixation elements (5) are provided that are fixedly connected to the housing (4) and that fix the drive wheels (1, 2), around which the endless traction mechanism (3) is wrapped, at an operational distance from one another.

Abstract: A tensioning device for compensating for elongations of the traction mechanism, in particular a chain or a timing belt, of a power transmission drive, in particular on an internal combustion engine, having a tensioning mechanism, in particular a tensioning rail, a sliding shoe or tensioning arm having a tensioning roller. A tensioning element is disposed between a support surface on the tensioning mechanism and a support, in particular on the internal combustion engine, and the support surface on the tensioning mechanism is made of a material which has a high strength.

Abstract: A captive securing arrangement for securing a connection element in an opening with a securing element that protects the connection element from falling out. The securing element is constructed integrally from one of the components to be connected and projects in the radial direction into the opening, reducing the opening. The connection element is constructed as a screw that has a shaft diameter D1, a threading diameter D2, and the opening has an opening diameter D3, and a reduced opening diameter D4 that is reduced in the radial direction by the securing element, where D1<D4<D2<D3. The securing element is constructed integrally with the component has a material thickness h that is larger or equal to a thread pitch of the connection element.

Abstract: A chain or synchronous belt drive having at least one chain or synchronous belt wheel (3) is provided which is integrated into the drive, whereon the chain or synchronous belt (2) is guided. The chain or synchronous belt includes an over-jump protection element which overlaps, at least partially, the chain or synchronous belt (2) on an side opposite the wheel (3). The over-jump protection element (13) is arranged on a guiding or tensioning element (12).

Abstract: A tensioning device for a traction mechanism drive. The tensioning device includes a tensioning piston which is mounted in an axially movable manner and provided with an attachment shaft facing the traction mechanism. The tensioning device also includes a tensioning shoe formed of a polymer plastic and mounted on the attachment shaft via a support hole, and a disk-shaped metallic support element which is fixed to the attachment shaft via its support hole. The force transmission between the tensioning shoe (2) and the tensioning piston (5) is improved by pre-mounting the support element (11) in or on the tensioning shoe (2) in a positively or non-positively fixed manner, and the support element (11) is connected to the tensioning piston (5), in the mounted state, via a press fit between the support hole (12) and the attachment shaft (4), and contacts a shoulder (9) of the tensioning piston (5).

Abstract: The invention relates to a traction mechanism drive (1) for machine parts and drive assemblies, for example, in automotive engineering, with an endless traction element (2), wherein the traction element (2) is guided by driving and driven wheels (3, 4, 5), and with a tensioning rail (10) that can pivot about a point of rotation (13) on one end for contacting the traction element (2) and also with an actuator (11) acting on the tensioning rail (10). To prevent loss of preliminary tensioning of the traction or traction element (2), a mechanical free-wheel is integrated at the point of rotation (13) of the tensioning rail (10) at the one end as a reverse-rotation locking or limiting device.

Abstract: A tensioning device for a traction mechanism drive. The tensioning device includes a tensioning piston which is mounted in an axially movable manner and provided with an attachment shaft facing the traction mechanism. The tensioning device also includes a tensioning shoe formed of a polymer plastic and mounted on the attachment shaft via a support hole, and a disk-shaped metallic support element which is fixed to the attachment shaft via its support hole. The force transmission between the tensioning shoe (2) and the tensioning piston (5) is improved by pre-mounting the support element (11) in or on the tensioning shoe (2) in a positively or non-positively fixed manner, and the support element (11) is connected to the tensioning piston (5), in the mounted state, via a press fit between the support hole (12) and the attachment shaft (4), and contacts a shoulder (9) of the tensioning piston (5).

Abstract: A compensating drive for driving a compensating shaft of an internal combustion engine, comprising a toothed belt or a chain, which connects a crankshaft driven wheel of the internal combustion engine to a drive wheel on the compensating shaft or shafts, in which case the crankshaft driven wheel (2, 2?) and/or the drive wheel or wheels (5) of the compensating shafts (4) are shaped to be non-circular in such a way that they transmit to the drive a variability, which at least partially compensates the vibrations produced during the rotation of the crankshaft (1).

Abstract: Hydraulic tensioning system for a flexible drive, in which a longitudinally displaceable piston guided in a housing is subjected to the force of a hydraulic fluid. For this purpose, the hydraulic fluid passes via a feed bore into a supply chamber of the housing. A portion of the hydraulic fluid is diverted via an injection nozzle of the housing for the purpose of acting on the flexible drive element.

Abstract: A traction mechanism that includes at least one guide (1, 1?-1???) for tensioning or guiding a continuous traction drive element, especially a chain of the control drive of an internal combustion engine is provided. The guide (1, 1?-1???) is made of plastic and metal inserts and has a double T cross-section having an upper member (3) and a lower member (4) that are connected by a central web (5) and ribs (6) arranged endwise on both ends of the web (5). The invention provides a rigid, compact and inexpensive guide. For this purpose, the guide (1, 1?-1???) includes two lateral plates (2, 2?-2???, 18, 19), preferably made from steel, that are inserted into recesses (7) in the side faces (29) of the ribs (6) in a play-free manner and are held in position by form fitting fastening elements.

Abstract: A hydraulic chain tensioner, whose high-pressure chamber receiving a chain tensioner piston mounted counter to a spring is connected to an oil supply chamber of the tensioner, which communicates with the oil gallery of the engine, wherein in the oil supply to the chain tensioner, particularly in the wall of the oil supply chamber, a pressure relief valve is installed, the opening pressure of which is matched to the desired supply pressure of the tensioner.