Rotary shafts – gudgeons – housings – and flexible couplings for ro – Torque transmitted via flexible element – Nonmetallic element
Patent
1998-02-20
2000-05-30
Cuomo, Peter M.
Rotary shafts, gudgeons, housings, and flexible couplings for ro
Torque transmitted via flexible element
Nonmetallic element
464 87, 464 89, 464180, F16D 376
Patent
active
060685557
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a shaft coupling.
Shaft couplings of this kind are known from FR-A-2 331 713.
It is the object of the invention to design a vibration damping, torsionally elastic shaft coupling such that it will be capable of decoupling vibrations of small amplitude at low torques in a power train.
SUMMARY OF THE INVENTION
The object is met, in accordance with the invention, by the shaft coupling of the invention having first and second flanges designed to be secured to a shaft and a flexible disc disposed between the two flanges and alternately fixed at angular spacings to one of the flanges. The shaft coupling further includes a torsional vibration suppressor having a suppressor collar rigidly connected to the second flange, a gyrating mass and a rubber spring suspension system adhering to the suppressor collar and the gyrating mass. The shaft coupling further includes a centering device having a centering collar rigidly connected to the second flange, a centering body rigidly connected to the first flange and a rubber spring suspension system adhering to the centering collar. The second flange is divided into a primary portion and a secondary portion interconnected by a rubber spring suspension system. The primary portion is designed to be secured to the associated shaft and comprises at least one of the collars. The secondary portion is connected through the flexible disc to the first flange.
BRIEF DESCRIPTION OF THE DRAWINGS
Embodiments of the invention will be described below with reference to diagrammatic drawings in which:
FIG. 1 shows a first embodiment of a shaft coupling according to the invention in sectional elevation I--I of FIG. 2;
FIG. 2 is the front end view in the direction of arrow II of FIG. 1;
FIG. 3 shows a second embodiment of a shaft coupling according to the invention in sectional elevation III--III of FIG. 4; and
FIG. 4 is the front end view in the direction of arrow IV of FIG. 3.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Each of the shaft couplings illustrated is intended to be used as part of a power train in a motor vehicle, especially to be installed between a clutch and a differential gear.
As is well-known such shaft couplings have a first flange 10 slipped on a first shaft 12, secured to it by a nut 14, as well as a plurality of arms 16, normally three, to receive a threaded bolt 18 each. Opposite the first flange 10, and at an axial spacing from it, there is a second flange 20 adapted to be fastened to a second shaft 22, such as a tubular semishaft of the kind shown in FIGS. 1 and 3, by a friction weld 24 for example. The second flange 20 likewise comprises three arms 26, each to take up a threaded bolt 28.
A customary flexible disc 30, comprising six paraxial bushings 32 to house one each of the threaded bolts 18 and 28, is positioned between the two flanges 10 and 20. The bushings 32 may be surrounded directly by yarn windings which wrap them in pairs or they may be embedded in relatively soft rubber 34 and each be encircled by an external bushing 36. The external bushings in turn may be wrapped in pairs by yarn windings. Other than that the flexible disc 30 is made of rubber 38.
A suppressor collar 42 (FIG. 3) of a torsional vibration suppressor 40 is formed at the second flange 20. The torsional vibration suppressor 40 includes an annular gyrating mass 46 surrounding the suppressor collar 42 to which it is fixed in conventional manner by a vulcanized rubber spring suspension system 48.
The mutual centering of the two shafts offered by the flexible disc 30 alone, which interconnects the two shafts 12 and 22, is not sufficiently accurate for all purposes. To avoid the necessity of having to obtain centering by means of expensive bearing means for the two shafts 12 and 22, a centering device 50 is provided. As shown in FIG. 1, the centering device 50 comprises a centering sleeve 52 pressed into a cylindrical seat 54 formed in the second flange 20, the sleeve also is radially spaced from and surrounds a pin-shaped centering bod
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Andra Rainer
Schneider Wilfried
Buck Brian H.
Cuomo Peter M.
SGF - Suddeutsche Gelenkscheibenfabrik GmbH & Co. KG
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