Blw Praezisionsschmiede Gmbh

Blw Prazisionsschmiede Gmbh

Bayerisches Leichtmetallwerk Graf Blucher Von Wahlstatt Gmbh

Georg Tauschek

Peter Gutmann

Gerd Weissmann

Andreas Sedlmeier

Werner Spielmann

Manfred Eisen

Anton Schmid

Peter Pollok

In a coupling tooth formation, in particular in a gear box, either on a gear sleeve or on a gear wheel, the teeth are fitted to the base end of a cylindrical base ( ) in relation to the rotational axis, elongate in axial direction and provided at their coupling end with a roof outline sloping from the tooth base towards the tooth head, comprising a rounded roof edge ( ); the radius of the roof edge rounding increases from the tooth base towards the tooth head according to a pre-set function in order to design the procedure of the tracking process after the initial contact as smoothly running as possible.

Clutch gearing especially for a manual transmission

The invention concerns a morphology matrix for forming the cross-sectional shape of a short gearing tooth, in particular on toothed wheels of motor vehicle gearboxes. The short gearing teeth are formed on a cylindrical section of a gear wheel or gear shift sleeve, the axis of this section coinciding with the displacement axis of the gear shift sleeve. Each tooth comprises a tip which is chamfered in roof-like manner and has lateral flanks (,) which are shaped towards the tooth base (,) so that they have a relief at least over part of their height. The lateral flanks (,) terminate in a radiused tooth base (,), all of the teeth, or some thereof defined according to a regularly changing pattern, having at least a morphology defining the shape of the lateral flanks.

Gearing tooth form

The invention relates to a coupling toothing in a gearbox between two rotationally symmetrical coupling structures (5,6) which can be coupled with each other. The toothing comprises the following features to increase the strength thereof: (a) both coupling structures (5,6) have claws on opposing sides which project axially from a base surface (10); (b) in a first of the two coupling structures (6), the claws (14,15,16) are arranged on the inner peripheral surface (17) of an outer collar (18) delimiting the base surface (10); (c) in the second of the two coupling structures (5), the claws (7,8) are arranged on the external periphery surface (9) of an inner collar (13) delimiting the base surface (10); and (d) the coupling surfaces of the two claws each have an undercut profile.

Coupling toothing in a gearbox

In the case of a claw toothing for a gearbox or the like, of which the claws are designed with an undercut and, viewed in cross-section with respect to the longitudinal axis of the claws, have a flat or convex roof profile, it is provided to improve the engagement that the plan view of the claws tapers into a wedge shape towards the rotational axis of the claw toothing and that the generatrices (5a, 5b) of the roof profile and/or the sides, in the longitudinal direction of the claw, are straight lines which go through the rotational axis (D).

Claw toothing for a gearbox or the like

For producing coupling members with a negative relief of the load-bearing contact surfaces, according to a method for the precision forging of coupling members, it is proposed that in a rough-forging process, first of all contact surfaces (5) parallel to the direction of the forging stroke are produced and in particular with an admeasurement exceeding the adjoining top faces (2) at least in the marginal region adjoining the respective common edge (3) of the spacers and that in a subsequent cold gauging process, the top faces are forged with exact measurements so that every finished contact surface extends obliquely towards the top face enlarged by gauging.

Growing community of inventors

Munich, Germany

Georg Tauschek