Abstract: A gear transmission stage is described, consisting of two intermeshing gears hardened by heat treatment. In order to improve the noise behaviour, it is proposed that one of the two gears has a final form determined by hard fine machining and the other gear has a form which is determined by heat treatment and is close to finished contours.

Abstract: A sintered gearwheel is described having teeth (1) which, in the flank and root region (2, 3), comprise a compacted surface layer (7, 8, 9) which is continuous in the transition portion (4) between the flank and root region (2, 3) and has a residual porosity of less than 10%. In order to increase the load-bearing capacity it is proposed that the compacted surface layer (9) is formed with a lower thickness in the transitional portion (4) between the flank and root region (2, 3) than in the adjacent flank and root regions (2, 3).

Abstract: The invention relates to a method for the production of a one-piece, metal multiple wheel (2) for a traction mechanism comprising at least two adjacently disposed single wheels (3, 4), each comprising a wheel body (5, 6) having an outer circumference (7, 8), wherein teeth (9, 10) for engaging the traction mechanism are arranged in a distributed manner over the outer circumference (7, 8), and wherein at least one of the two single wheels (3, 4) is configured as a sprocket, gear or toothed belt wheel.

Abstract: The invention relates to a gear arrangement (1) having a split spur gear toothing, comprising a main gear (2) and a gear (4) rotatable relative to it in the circumferential direction (3), and the main gear (2) has a hub (5) on which the rotatable gear (4) is mounted, and having a spring element (9) which is disposed between the main gear (2) and the rotatable gear (4) and by means of which the rotatable gear (4) is biased in the circumferential direction (3) towards the main gear (2), and a first spur gear toothing part (14) is provided on the main gear (2) and a second spur gear toothing part (15) is provided on the rotatable gear (4). The rotatable gear (4) is guided by means of at least one at least approximately annular guide web (16) in the region of the spur gear toothing.

Abstract: The invention relates to a method of closing a bore (3) in a metal sintered component (2), whereby, prior to sintering a preform (1) to obtain the sintered component (2) or before a step of calibrating the sintered component (2), a closing body (5) is pushed into the bore (3), and the closing body (3) has an external diameter that is either of an identical size to or at least partially larger than the internal diameter (9) of the bore (3).

Abstract: A method for backing the inside teeth (2) of a sliding sleeve (3) produced by way of powder metallurgy for a manual transmission is described where the backings (1) of the teeth (4) forming the front-side pitches (9) are formed with the aid of a rolling tool (5) by back rolling accompanied by plastic deformation of material from the backing region. In order to prevent burr formation, it is proposed that the front-side tooth sections (8) delimited by the backings (1) are simultaneously calibrated whilst forming and/or calibrating the relevant pitches (9) with the aid of the rolling tool (5) for forming the backings (1).

Abstract: The invention describes a device (1) for calibrating a sintered molded part (2) with an angular toothing (3) by means of a calibrating tool (4), comprising a lower punch (15) for mounting the sintered molded part (2) with a lower punch external toothing (23), a vertically movable and axially rotatably mounted upper punch (8) with an upper punch external toothing (21), as well as an axially rotatably mounted die (14) with a die internal toothing (24). The lower punch (15) is mounted to be moveable only in vertical direction.

Abstract: The invention relates to a filling shoe (9) for filling a moulding cavity (10) of a pressing mold with a powder, comprising a casing (14) with at least one filling cavity (13) having at least one side wall, wherein at least one filling opening (18), via which the powder can be introduced into the filling cavity (13), is designed on the casing (14). At least one stripping element (21) connected to a drive unit (23) is arranged in the filling cavity (13), wherein the at least one stripping element (21) is rotatable.

Abstract: The invention relates to a synchronizer hub (3) for a gearbox synchronization device (1) in a manual gearbox, comprising a base body (29) having a radial outer peripheral surface (30) and two axial end faces (31, 32) adjoining the circumferential surface (30), wherein an external tooth system (19) with radially outward pointing teeth (33) is arranged on the circumferential surface (30), interrupted by at least one recess (21), and with a annular groove (25), arranged in one of the end faces (32) and underneath the external tooth system (19), wherein the annular groove (25) is also interrupted by the at least one recess (21). Several segments (34) that extend in the radial direction into the area of the annular groove (25) and partially cover it are arranged on the axial end face (32).

Abstract: The invention relates to a gearwheel arrangement (1) with a main gearwheel (2) and a gearwheel (4) rotatable relative to the latter in circumferential direction (3), wherein the main gearwheel (2) comprises a hub (5) on which the rotatable gearwheel (4) is arranged, and with a spring element (7), which is arranged between the main gearwheel (2) and the rotatable gearwheel (4), and by means of which the rotatable gearwheel (4) is pretensioned in circumferential direction (3) against the main gearwheel (2), wherein the main gearwheel (2) comprises at least one first support element (22) and the rotatable gearwheel (4) comprises at least one second support element (23), and wherein the spring element (7) is arranged between the first and the second support element (22, 23) and thereby spaced apart from the first surface (19) of the main gearwheel (2) and from the second surface (21) of the rotatable gearwheel (4).

Abstract: The invention relates to a synchronizer hub (1) comprising a hub body (4) that, on the outer circumference (5) thereof, has a sleeve toothing (6) for engagement of a sliding sleeve (6a), said sleeve toothing being interrupted by at least one first axial recess (7) and by at least one second axial recess (8), wherein the first axial recess (7) has first lateral faces (14, 15) and the second axial recess (8) has second lateral faces (17, 18), and wherein the first lateral faces (14, 15) are inclined to the axial direction at a first angle (20). The second lateral faces (17, 18) of the second axial recess (8) run at a second angle (21) to the axial direction, wherein the second angle (21) is not equal to the first angle (20) of the first lateral faces (14, 15).

Abstract: A gear is described for a spur gear stage without play having a hub (1) and a sprocket (2), which is divided along its axis-normal division plane into two partial sprockets, namely into a hub-fixed sprocket part (3) and a sprocket ring (4) which is mounted so it is coaxially rotatable in relation thereto, and which forms springs (6) sectionally enclosing the hub (1) in the circumferential direction, which are integrally connected at their bases (11) to the sprocket ring (4) and which are supported with their free ends (7) protruding toward the hub (1) on stops (8) of the hub (1).

Abstract: An arrangement has at least one electrical winding having a one-part or multi-part component produced from a soft-magnetic powder composite material, which component conducts an electromagnetic flow of the winding, at least in certain regions, and has a recess provided in the region of this flow conduction, and having a one-part or multi-part, particularly metallic connector part, which has a greater mechanical strength and/or electrical conductivity and/or thermal conductivity as compared to the component, and projects into the recess of the component. In order to achieve particular thermal, mechanical and/or electrical properties, the recess penetrates the component in the region of its flow conduction, and the connector part that projects through this recess forms a mechanical, electrical and/or thermal bridge that bridges the component.

Abstract: The invention describes a method of machining a toothing (7) on an outer circumference (6) or an inner circumference of a work piece (2) made of pressed and sintered powder metal, by means of a rolling process carried out on the toothing (7) with two rotating section rolling wheels (8) which section toothing (13) engaging in the toothing of work piece (2). The two section rolling wheels (8) are rotatably arranged in a common support frame (10) with an at least approximately constant distance between their section rolling wheel axles (9).

Abstract: The invention relates to a power assist element (11) for arranging in a synchronization hub (2) of a gear-synchronization device (1), with a basic body (17), which has a height (18), a longitudinal extension (19) and a width extension (20), wherein the longitudinal extension is arranged in the installed state in the circumferential direction of the synchronization hub (2), and which in the direction of the longitudinal extension (19) has two opposite distal end sections (21), on which respectively a functional face (22) is formed, which in the installed state cooperate with the synchronization hub (2).

Abstract: The invention relates to an assembly (1) at least comprising a first metal component (2) having a first surface region (5) and a second metal component (3) having a second surface region (7), wherein the two surface regions (5, 7) face each other, and the first and the second component (2, 3) are connected cohesively together at least in a subregion of the two surface regions (5, 7), and wherein at least one of the two metal components (2, 3) is a sintered component, wherein that surface region (7) of the sintered component that has the cohesive connection has a higher density than the adjoining further surface region of the sintered component.

Abstract: The invention relates to a method for producing a toothed wheel (1) in net shape or near-net shape quality, in particular a chain wheel, for a VVT system from a powder, with the toothed wheel (1) having an at least approximately cylindrically shaped housing (2) which is delimited in axial direction by one respective end face (6, 7) and which has an outside surface (3), and at the outside surface (3), a toothing (8) having teeth (9) and tooth roots (10) between the teeth (9) is embodied at a distance to both of the end faces (6, 7), and the toothing (8) has a tooth root circle (25) having a tooth root circle diameter, and the powder is filled into a mold (28) and pressed by means of at least one punch, and protrusions (11, 20) are embodied at least in the region of the teeth (9) at the outside surface (3) of the housing (2) and projecting over the latter in radial direction.

Abstract: The invention relates to a gear system (1) comprising a main gear (2) and a gear (4) rotatable relative thereto in circumferential direction (3), comprising spring elements (8), by means of which the rotatable gear (4) is pretensioned in circumferential direction (3) against the main gear (2), wherein the spring elements (8) are connected on the one hand to the main gear (2) and on the other hand to the rotatable gear (4), and wherein the spring elements (8) each have a longitudinal middle axis (19) running obliquely relative to an axial end face (18) of the rotatable gear (4).

Abstract: The invention relates to a bearing cover (3) for a split bearing arrangement (1) which, in addition to the bearing cover (3), comprises a bearing block (2), and the bearing cover (3) has a clamping surface (5) which lies against a co-operating clamping surface (6) of the bearing block (2) when the bearing arrangement (1) is in the assembled state, and at least one projection (7) is provided on the clamping surface (5) and protruding out from it which can be pushed into the co-operating clamping surface (6) of the bearing block (2). The at least one projection (7) has a cross-section (9) which varies across its extension on the clamping surface (5) and/or is of a conical or frustoconical or pyramid or truncated pyramid shape.

Abstract: A sintered coupling ring (1) is described, comprising a ring of coupling teeth (2) which comprise relieved flanks (4) extending from wedge-shaped end faces (3) and, on the side opposite the wedge-shaped end faces (3), a stop (5) that protrudes radially beyond the tooth tip (6). In order to provide advantageous constructional conditions it is proposed that the stops (5) have a greater density than the remaining tooth tip (6).