Abstract: A roller tappet having a housing near whose drive side front end, two diametrically opposing flats receding from an outer wall of the housing are arranged, each of the two flats having a seat with a U-shape open in a direction towards the drive side front end. A pin is mounted in the seats, a roller serving as a run-on surface of a periodic stroke producer extends on said pin, and a support for a tappet follower element is seated axially under the roller near a driven side front end of the roller tappet. A retention element is provided for the pin in an axial direction of the pin and a retention element in the seats of the pin is provided for preventing the pin from exiting axially out of the housing, and these two retention elements are united.

Abstract: A structural assembly (1) for a high pressure fuel pump, with the structural assembly (1) having a tappet (3) connected to a pump piston (2), which bears frontally against a contact surface (7) of an inner side (8) of the bottom (5) of the pump piston (2), the bottom (5) being connected to a guide skirt (10) of the tappet (3). An outer peripheral wall (11) of the pump piston (2) is surrounded near the inner side (8) with radial lash by a bore (12) of a spring plate (13) on whose bottom-distal side (14) a coil compression spring (15) bears for resetting the pump piston (2), and a bottom side (16) of the spring plate (13) is situated opposite an annular surface (17) of an entraining collar (18) on the pump piston (2). The entraining collar (18) is a separate, disk-like element seated on the pump piston (2) with slight axial distance to the spring plate (13), which spring plate (13) possesses a disk section (19) with the bottom side (16) having the bore (12).

Abstract: The invention concerns a roller tappet (1) for a high pressure fuel pump, said roller tappet (1) comprising a housing (2) comprising on a drive side front end (3), a slide-mounted roller (4) serving as a running surface of a cam, said housing (2), as viewed in housing direction, comprising a bridge member (5) arranged below the roller (4), said bridge member (5) comprising on a front end (7) turned towards a driven side front end (6) of the housing (2), a support (8) for a tappet follower member, wherein a shell member (11) like a semi shell or a one-third shell separated out of a rolling bearing ring is seated in a cylindrical cavity (9) of a further drive side front end (10) of the bridge member (5), and the roller (4) extends for sliding displacement directly in said shell member (11).

Abstract: A cam follower for a high-pressure fuel pump of an internal combustion engine, which has a cam roller that is accommodated in a pocket of the cam follower. The cam roller has a bore and the bore is mounted by on a pin which is seated at the ends in receptacles of opposite walls of the pocket. The cam roller runs with its end sides directly in front of the walls. Each end side of the cam roller takes the form of an outer surface of a spherical zone, and each wall is smooth and straight, at least in the region of its run-on piece at the respective end side of the cam roller.

Abstract: A tappet (1) for a high-pressure fuel pump having a housing (2), the drive input side (7), which serves as a cam run-on face. The housing (2) incorporates a roller (8), wherein the drive output side (3), which serves as a contact surface for a tappet follower part, of said housing (2) bears against an underside (4) of a bridge piece (6) which projects through an inner casing (5) of the housing (2), and a rotation prevention device (11) which projects beyond the outer casing (10) of the housing (2) extends in a window (9) of the housing (2). The rotation prevention device (11) is formed by a radial elongation of the bridge piece (6). A projection extends from the inner casing (5) of the tappet (1) only on a portion situated diametrically opposite the window (7), which projection is integrally connected and is produced by a punching and embossing process and rises in a wedge shape in a direction of the drive input side.

Abstract: The invention relates to a tappet (1) for a high-pressure fuel pump or for a valve drive of an internal combustion engine, comprising a housing (2) which has a cam run-on surface (4) on the drive side (3) thereof, wherein an output side (5) of the housing (2) rests on a lower face (6) of a bridge piece (8) that projects through an inner shell (7) of the housing (2), wherein an anti-turn lug (11) protrudes from the outer shell (10) of the housing (2) and is arranged in a window (9) in the latter, wherein said lug is substantially present as an upright body similar to a semi-cylinder in the region thereof protruding from the housing (2), and the outer surface (15) of said lug, in cross section, results in an ogival curve made up of two or more circular arcs (16).

Abstract: A roller tappet (1) is proposed for a high-pressure fuel pump of an internal combustion engine, having a housing (2), in the case of the drive-side end (3) of which two surfaces (5) which lie diametrically opposite one another and are depressed by an outer shell (4) of the housing (2) are applied with in each case one receptacle (6), in which surfaces (5) a pin (8) is mounted which carries a cam roller (7), wherein an inner shell (9) of the housing (2), axially below the cam roller (7) as viewed in the direction remote from the drive, is penetrated by a bridge piece (10), the output-side end (11) of which has a rest (12) for a tappet following part, wherein the outer shell (4) of the housing (2) which is non-stepped as least as far as possible apart from the surfaces (5) is provided as a closed circumferential ring (14), as viewed in the drive direction immediately above upper sides (13) of the surfaces (5), which upper sides (13) run through the housing (2) in the manner of chords, which closed circumferenti

Abstract: The invention concerns a roller tappet (1) for a high pressure fuel pump, said roller tappet (1) comprising a housing (2) comprising on a drive side front end (3), a slide-mounted roller (4) serving as a running surface of a cam, said housing (2), as viewed in housing direction, comprising a bridge member (5) arranged below the roller (4), said bridge member (5) comprising on a front end (7) turned towards a driven side front end (6) of the housing (2), a support (8) for a tappet follower member, wherein a shell member (11) like a semi shell or a one-third shell separated out of a rolling bearing ring is seated in a cylindrical cavity (9) of a further drive side front end (10) of the bridge member (5), and the roller (4) extends for sliding displacement directly in said shell member (11).

Abstract: A tappet (1), either for a high-pressure fuel pump or for a valve train of an internal combustion engine, with a housing (2) whose driven side (3) used for a contact of a tappet-following part forms a contact on a bottom side (4) of a bridge part (6) projecting through an inner casing (5) of the housing (2). An anti-rotation locking device (10) projects past the outer casing (8) of the housing with a first cylinder section (9) and sits in a window (7) of the housing (2), with this anti-rotation locking device (10) being provided as a cylindrical element, and tab-like projections (13) project from peripheral walls (11) of the window (7) and the anti-rotation locking device (10), standing “loose” in the window (7), snaps behind these projections.

Abstract: A cam follower for a high-pressure fuel pump of an internal combustion engine, which has a cam roller that is accommodated in a pocket of the cam follower. The cam roller has a bore and the bore is mounted by on a pin which is seated at the ends in receptacles of opposite walls of the pocket. The cam roller runs with its end sides directly in front of the walls. Each end side of the cam roller takes the form of an outer surface of a spherical zone, and each wall is smooth and straight, at least in the region of its run-on piece at the respective end side of the cam roller.

Abstract: A mechanical roller tappet (1a, 1b) comprising a tappet housing (2a, 2b) shaped out of sheet metal, a drive roller (3) actuable by a cam (9) and an axle (5a, 5b) on which the drive roller (3) is mounted, end portions (24) of the axle (5a, 5b) being supported in axle eyes (23) of the tappet housing (2a, 2b), said tappet housing (2a, 2b) comprising a tappet skirt (10a, 10b) and a tappet bottom (16) possessing a contact surface (21) for an adjacent engine component on a power take-off side and at an end of the tappet skirt facing the cam, the tappet bottom is connected to the tappet skirt and is shaped into the interior of the tappet skirt while forming a pocket for receiving the drive roller, the axle eyes being arranged in first sections (18) of the tappet bottom while being spaced from an inner peripheral surface (19) of the tappet skirt and extend substantially parallel to the longitudinal direction of the tappet skirt, the contact surface being arranged on a second section (20) of the tappet bottom connecti

Abstract: A tappet (1) for a high-pressure fuel pump having a housing (2), the drive input side (7), which serves as a cam run-on face. The housing (2) incorporates a roller (8), wherein the drive output side (3), which serves as a contact surface for a tappet follower part, of said housing (2) bears against an underside (4) of a bridge piece (6) which projects through an inner casing (5) of the housing (2), and a rotation prevention device (11) which projects beyond the outer casing (10) of the housing (2) extends in a window (9) of the housing (2). The rotation prevention device (11) is formed by a radial elongation of the bridge piece (6). A projection extends from the inner casing (5) of the tappet (1) only on a portion situated diametrically opposite the window (7), which projection is integrally connected and is produced by a punching and embossing process and rises in a wedge shape in a direction of the drive input side.

Abstract: A hydraulic support element for a switchable cam follower of a valve drive of an internal combustion engine, which has a pot-like housing with a bore, a pressure piston formed in one piece with an external casing and head projecting over an edge of the housing and a high pressure space for a hydraulic medium. The high pressure space is supplied, via a non-return valve from a first reservoir space, which is fed via first passages in the housing and pressure piston. A second reservoir space is formed in the pressure piston axially above the first reservoir space and is filled by second passages in the housing and pressure piston. From the second reservoir space a hydraulic medium is conducted to the cam follower via an opening in the head. The reservoir spaces are separated by a ball around which the internal wall of the pressure piston is wrapped.

Abstract: A structural assembly (1) for a high pressure fuel pump, with the structural assembly (1) having a tappet (3) connected to a pump piston (2), which bears frontally against a contact surface (7) of an inner side (8) of the bottom (5) of the pump piston (2), the bottom (5) being connected to a guide skirt (10) of the tappet (3). An outer peripheral wall (11) of the pump piston (2) is surrounded near the inner side (8) with radial lash by a bore (12) of a spring plate (13) on whose bottom-distal side (14) a coil compression spring (15) bears for resetting the pump piston (2), and a bottom side (16) of the spring plate (13) is situated opposite an annular surface (17) of an entraining collar (18) on the pump piston (2). The entraining collar (18) is a separate, disk-like element seated on the pump piston (2) with slight axial distance to the spring plate (13), which spring plate (13) possesses a disk section (19) with the bottom side (16) having the bore (12).

Abstract: A mechanical tappet (101, 201, 301, 401, 501, 601, 701, 801, 901, 1001) is provided, in particular for actuating the lifting of a pump piston (39) of a fuel pump of an internal combustion engine, with a sleeve-shaped tappet housing (102, 202, 302, 402, 502, 602, 702, 902, 1002) constructed as a shaped sheet-metal part and with a driving roller (6) supported so that it can rotate. Here, a bolt (4) supports the driving roller so that it is centered, and end sections (7) of the bolt projecting from the driving roller are supported in bolt eyes (8) of the tappet housing.

Abstract: A hydraulic support element for a switchable cam follower of a valve drive of an internal combustion engine, which has a pot-like housing with a bore, a pressure piston formed in one piece with an external casing and head projecting over an edge of the housing and a high pressure space for a hydraulic medium. The high pressure space is supplied, via a non-return valve from a first reservoir space, which is fed via first passages in the housing and pressure piston. A second reservoir space is formed in the pressure piston axially above the first reservoir space and is filled by second passages in the housing and pressure piston. From the second reservoir space a hydraulic medium is conducted to the cam follower via an opening in the head.

Abstract: The invention proposes a mechanical roller tappet (1a, 1b) comprising a tappet housing (2a, 2b) shaped out of sheet metal, a drive roller (3) actuable by a cam (9) and an axle (5a, 5b) on which the drive roller (3) is mounted, end portions (24) of the axle (5a, 5b) being supported in axle eyes (23) of the tappet housing (2a, 2b), said tappet housing (2a, 2b) comprising a tappet skirt (10a, 10b) and a tappet bottom (16) possessing a contact surface (21) for an adjacent engine component on a power take-off side.

Abstract: The invention proposes a switching element (1) for a valve train of an internal combustion engine, particularly for valve deactivation, with a simple-to-implement measure for adjusting the coupling lash of its coupling means (8) in a receptacle (6) using two retaining rings (19, 20), one of which is stocked in a variety of thicknesses.

Abstract: A mechanical tappet (101, 201, 301, 401, 501, 601, 701, 801, 901, 1001) is provided, in particular for actuating the lifting of a pump piston (39) of a fuel pump of an internal combustion engine, with a sleeve-shaped tappet housing (102, 202, 302, 402, 502, 602, 702, 902, 1002) constructed as a shaped sheet-metal part and with a driving roller (6) supported so that it can rotate. Here, a bolt (4) supports the driving roller so that it is centered, and end sections (7) of the bolt projecting from the driving roller are supported in bolt eyes (8) of the tappet housing.

Abstract: The invention proposes a switching element (1) for a valve train of an internal combustion engine, particularly for valve deactivation, with a simple-to-implement measure for adjusting the coupling lash of its coupling means (8) in a receptacle (6) using two retaining rings (19, 20), one of which is stocked in a variety of thicknesses.