Geometrical instruments – Gauge
Reexamination Certificate
1999-06-24
2001-04-24
Fulton, Christopher W. (Department: 2859)
Geometrical instruments
Gauge
C033S710000, C033S813000, C033S833000
Reexamination Certificate
active
06219927
ABSTRACT:
The invention relates to a manual adjuster for prestressing a differential gear, in which case retaining rings are inserted in receiving grooves provided in the gearbox and rest against bearing rings of tapered roller bearings of two ring gear axle ends, and in which case the width of the retaining rings is determined with a view to a desired tooth surface play between the ring gear and a bevel drive pinion meshing therewith, on the one hand, and to a desired prestressing force, on the other hand. Concerning the known prior art, reference is made, for example, to German Patent Document DE 36 26 442 A1.
During their assembly, differential gears or rear axle gears of motor vehicles must be adjusted as precisely as possible, specifically with a view to the prestressing of the tapered roller bearings which are provided in the gearbox and carry the usual ring gear by way of axle ends as well as with a view to the tooth surface play between the ring gear and a bevel drive pinion meshing with the ring gear. In this case, a simple construction of the transmission is obtained by means of the above-mentioned retaining rings which are adapted with respect to their width and on which the bearing rings, particularly the outer bearing rings of the tapered roller bearings are supported. The determination of the required width of the retaining rings—particularly in the shop situation—can take place by trial and error; that is, experimentally retaining rings of different widths are installed until the desired values for the tooth surface play as well as for the prestressing force are reached. However, this is unsatisfactory so that the invention has the object of providing a manual adjusting device for the prestressing which is easy to handle and by means of which the required retaining ring width can be determined in a simple manner.
The achieving of this object is characterized by device parts which are assigned to the two receiving grooves and, in each case, engage in these by means of a tension bush and which, in addition, each have a pressure piece which can be axially displaced inside the tension bush and is in each case supported on the bearing ring of the tapered roller bearing, a set wheel, which displaces the pressure piece by way of an adjusting spindle, being provided on the first device part, while a pressure spindle applying the required prestressing force acts upon the pressure piece of the second device part. Advantageous developments and further developments are the content of the subclaims.
REFERENCES:
patent: 4174575 (1979-11-01), Nakata
patent: 4492018 (1985-01-01), Rode
patent: 5433015 (1995-07-01), Mazanat
patent: 6021580 (2000-02-01), Manfredotti et al.
patent: 6036541 (2000-03-01), Choi
patent: 36 26 442 (1988-02-01), None
patent: 0 604 763 (1994-07-01), None
patent: 55072939 (1980-06-01), None
patent: 57124120 (1982-08-01), None
Bayerische Motoren Werke Aktiengesellschaft
Evenson, McKeown, Edwards & Lenahan P.L.L.C.
Fulton Christopher W.
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