Fluid reaction surfaces (i.e. – impellers) – Rotor having flow confining or deflecting web – shroud or... – Blades projecting axially from concavo-convex annular web
Patent
1996-04-23
1997-04-01
Kwon, John T.
Fluid reaction surfaces (i.e., impellers)
Rotor having flow confining or deflecting web, shroud or...
Blades projecting axially from concavo-convex annular web
F04D 2938
Patent
active
056160020
DESCRIPTION:
BRIEF SUMMARY
The invention concerns a device for transmission of moment from a drive unit to a transmission using hydrodynamic converters according to the preamble of the first claim.
A hydrodynamic converter has been disclosed in J. Looman's book "Zahnradgetriebe" (gear drive), volume 26, 1970, page 124, FIG. 5.45. The hydrodynamic converter consists of a converter housing and an impeller, a turbine wheel and a stator free wheel integrated therein. The impeller is non-rotatably connected with the converter housing. As known per se, the energy is transmitted from the impeller to the turbine wheel via a fluid medium such as oil. The turbine wheel converts the flow movement to a rotary movement and drives a transmission input shaft. The moment is transmitted from a diagrammatically shown shaft to the converter housing via a dog. The dog is axially screwed with the shaft in the area thereof. The dog is also screwed in an axial direction with an intake which, in turn, is firmly connected with the converter housing. The converter housing or the impeller thus rotates at the same speed as the diagrammatically shown shaft. In the area of the central axle, the converter housing has a pivot on the side facing the shaft. Said pivot is positively locked in a recess of the shaft. Thereby, the radial position of the hydrodynamic converter relative to the shaft is fixed. The axial position of the hydrodynamic converter relative to the shaft is fixed by the screw connection shaft/dog and dog/intake.
The disadvantage of this design is that when installing a transmission, for example, in a motor vehicle, a large free space must exist between the engine block and the transmission housing, since the screw connection dog/converter housing is accessible only in an axial direction.
The problem to be solved by the invention is to secure a simple solution for installation while, at the same time, reducing the axial length.
According to the invention said problem is solved by the fact that the converter housing and the dog are fixed reciprocally in a radial direction by means of several connecting components. Connecting components, according to the invention, are to be understood, for example as: screws, rivets, bolts and pins. The solution according to the invention offers the advantage that as result of the radial accessibility of the fastening elements, the free space between the engine block and the hydrodynamic converter can be made shorter. This is specially advantageous when the space for the drive unit/transmission unit is limited like in motor vehicles with a rear engine or a central engine.
In another embodiment of the invention it is proposed that the connecting components be situated equidistantly on the periphery dog/converter housing and that the number of connecting components be even. The advantage obtained hereby is that changes of shape of the dog produced by internal structural stresses be compensated as result of oppositely situated connecting components.
In another embodiment of the invention, it is proposed that the dog consists of two legs, said legs forming a right angle, and the dog having, in the area of the angle, a recess. The advantage obtained hereby is that the dog be flexible in the radial direction. It is hereby ensured that the radial position of the hydrodynamic converter relative to a shaft is determined, like in the prior art, only by the pivot. As result of the flexible configuration of the dog, the radial fastening elements do not determine the radial position of the hydrodynamic converter.
Another solution according to the invention is that the converter housing and the dog be connected by a spline. In development of this, it is proposed that the spline extends in an axial direction. This solution offers the advantage that the drive unit/transmission connection can be plugged in. Thereby the time spent for installing and removing is shortened.
An embodiment of the invention is shown in the drawings. In the drawings:
FIG. 1 is a first embodiment of the device;
FIG. 2 is a top view of the first embodiment;
REFERENCES:
patent: 3101672 (1963-08-01), Peras
patent: 3316622 (1967-05-01), Jandasek
patent: 3545883 (1970-12-01), Iijima
patent: 3713353 (1973-01-01), Scheiter
patent: 3824038 (1974-07-01), Tokunaga
patent: 3839864 (1974-10-01), Ahlen
patent: 4665693 (1987-05-01), Misu et al.
patent: 5113654 (1992-05-01), Sahashi
patent: 5522220 (1996-06-01), Locker
Kwon John T.
ZF Friedrichshafen AG
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