Machine element or mechanism – Gearing – Rotary bodies
Patent
1995-11-07
1997-09-16
Bonck, Rodney H.
Machine element or mechanism
Gearing
Rotary bodies
74439, 384425, 384901, F16H 5702
Patent
active
056668546
DESCRIPTION:
BRIEF SUMMARY
The invention concerns a support for a gear wheel, preferably for a gear wheel in a toothed gear change transmission.
BACKGROUND OF THE INVENTION
In gear change transmissions gear wheels are used which require an axial fixing but are freely movable radially. Especially in input gear wheels of such transmissions that are not engaged in the power flow, the fixing in an axial direction and the freedom in a radial direction can be needed for a working load compensation. The gear wheels can, in this case, be provided with a continuous internal profiling. The internal profile has, in general, a groove in which axial support devices are used.
Also known are gear wheel supports in the toothing of which grooves are provided in the shaft which allow rotation of a support disc, provided with an internal toothing, in said groove. Such supports have been disclosed, for instance, in European patent application 0 390 368. Here the supporting disc rotated in the groove in the shaft is held in the rotated position by a wedge.
The problem to be solved by the invention is to provide a support for a gear wheel which makes reliable axial fixing and radial play possible.
BRIEF DESCRIPTION OF THE DRAWINGS
An explanation of the invention is described with reference to the drawings. In the drawings:
FIG. 1 is a representation of the component parts of the support according to the invention:
FIG. 2 is a representation of the assembled component parts;
FIG. 3 is a partial longitudinal section corresponding to line 3--3 in FIG. 2 from a representation of the arrangement in a transmission;
FIG. 4 is a modified stop disc;
FIG. 5 is the assembled support according to FIG. 4; and
FIG. 6 is the diagrammatic representation of the meshing of teeth.
DETAILED DESCRIPTION OF THE DRAWINGS
In FIG. 1, the component parts of the support are shown. FIG. 1A thus shows the locking disc, FIG. 1B the stop disc and FIG. 1C the gear wheel. It is proposed, according to the invention, to insert a first disc 6 in the continuous, internal profiling of a grooved gear wheel 4 as stop disc. The internal toothing 8 of the gear wheel 4 has a recess 10, in at least one area of its internal diameter, in which at least one tooth of the toothing is not provided. As shown in FIG. 1, preferably three of said recesses 10 are to be provided. The recesses 10 must be distributed on the periphery at respectively equal angles.
The first disc 6 has an external toothing 12 which corresponds to the internal toothing 8 of the gear wheel 4 and which also has on its external toothing at least one recess 14. Said recess 14 is designed so that at least one tooth of the external toothing 12 is not provided in this area. Three recesses 14 are also preferably to be provided here. The recesses 14 are distributed on the periphery of the stop disc 6 at equal angles.
The stop disc 6 is inserted in the gear wheel 4, in the internal toothing 8, up to the groove 30 and rotated in peripheral direction around at least part of one tooth gap until the teeth of the internal toothing 8 of the gear wheel 4 coincide with the teeth of the external toothing 12 of the stop disc 6. The insertion must be effected in such a manner that the recesses of the internal toothing 8 of the gear wheel 4 and the recesses 14 of the external toothing 12 of the stop disc 6 coincide. To fix the peripheral direction of the stop disc 6 relative to the gear wheel 4, and thus avoid a further rotation of the stop disc 6, a second disc is inserted as locking disc 16 likewise in the internal toothing 8 of the gear wheel 4. Said locking disc 16 has an external toothing 18 which likewise corresponds to the internal toothing 8 of the gear wheel 4.
Instead of teeth, at least a so-called "tab" or "knob" is provided as a locking device 22 on at least one area 20 of the external periphery which, relative to the plane of the locking disc 16, is bent almost to a right angle. Three such locking devices 22 are also preferably provided here. Said "tabs" or "knobs" 22 are distributed on the periphery of the locking disc 16 so as t
REFERENCES:
patent: 2108679 (1938-02-01), Kurti
patent: 2397905 (1946-04-01), Acton et al.
patent: 3500695 (1970-03-01), Keiser
patent: 3894621 (1975-07-01), Quick
patent: 5179866 (1993-01-01), Reynolds et al.
Revue Technique Diesel, Nr.12, 1984, Boulogne-B8llancourt Seite 65 'boite de vitesse Fuller' Figur "Arbre Secondaire".
Bader Josef
Buri Gerhard
Bonck Rodney H.
Grabow Troy
ZF Friedrichshafen AG
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