Rotary kinetic fluid motors or pumps – Working fluid passage or distributing means associated with... – Casing with mounting means
Reexamination Certificate
1999-10-05
2001-07-17
Look, Edward K. (Department: 3745)
Rotary kinetic fluid motors or pumps
Working fluid passage or distributing means associated with...
Casing with mounting means
C415S214100
Reexamination Certificate
active
06261060
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a casing for a hydrodynamic torque converter with a support fastened to the drive end of the converter casing, the support having a receptacle for receiving a connecting element for fastening the converter casing to a component of a drive.
2. Description of the Related Art
A prior art hydrodynamic torque converter is disclosed in German reference DE 41 21 586 A1.
FIG. 1
of that reference shows a receptacle at the drive end for receiving a connecting element for fastening the converter casing to a component of a drive. The receptacle is formed by a threaded sleeve with an internal thread. The receptacle is arranged on a support fastened on the converter casing by welding. A threaded connecting element such as a bolt is normally screwed into the threaded sleeve and also penetrates an opening in a plate which is fastened radially further inward on the respective drive such, for example, as on the crankshaft of an internal combustion engine. An example of such a plate which is connected to a crankshaft is disclosed in
FIG. 1
of German reference DE 32 22 119 C1. The converter casing is fastened in this way on the drive, the plate mentioned being regarded as a component of the drive.
Referring back to German reference DE 41 21 586 A1, it should be noted that the fastening of such a threaded sleeve on the respective support, preferably by means of welds, is relatively expensive in terms of manufacture and material. In addition, cutting the thread in this threaded sleeve cuts the grain structure of the sleeve material and therefore reduces the strength of the threaded sleeve. To compensate for this disadvantage, the wall thickness of the threaded sleeve is increased, which undesirably increases the weight of the converter casing.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a receptacle on a converter casing for receiving a connecting element for connecting the converter casing to a drive such that the receptacle provides optimum strength while minimizing material and manufacturing expenses.
This object is achieved by a hydrodynamic torque converter connectable to a component of a drive, comprising a converter casing having radial flange portion on a drive side of the hydrodynamic torque converter, a support extending along an extension direction and fastened to the converter casing on the drive side of the radial flange such that said extension direction of said support is in a radial direction relative to said converter casing, said support having a receptacle for receiving a connecting element for fastening the converter casing to the component of the drive, wherein said receptacle comprises an extrusion of said support extending essentially at a right angle to an extension direction of said support and having an annular collar surrounding a recess.
The arrangement of the receptacle as an extrusion from the support permits the extrusion to be manufactured integrally with the rest of the support. Accordingly, no additional connections of the receptacle to the support are necessary to produce a connection. The wall thickness of the collar of the receptacle formed in this way is essentially determined by the wall thickness of the support.
If the collar extends essentially at a right angle to the support, a sleeve is formed with a sufficient length in the axial direction so that any given connecting element obtains good guidance. The connecting element received by the receptacle may, for example, be formed by a rivet but is also preferably conceivable as a bolt. If a bolt is to used as the connecting element, the inside of the receptacle is provided with a thread.
Because the receptacle is configured as an extrusion in the support, work-hardening occurs during the manufacture of the collar so that even a small wall-thickness of the collar suffices for the production of a high-strength receptacle. If the receptacle requires threads, the threads are produced on the inner surface of the collar by pressing or rolling so that a further compaction of the grain structure of the material is achieved without cutting through this grain structure, to further exploit the advantage provided by the work hardening. The high strength achievable by the above arrangement minimizes the required amount of material so that the receptacles can be configured to have a very low mass.
An advantageous method of manufacturing the receptacle according to the invention is also given in the claims.
The various features of novelty which characterize the invention are pointed out with particularity in the claims annexed to and forming a part of the disclosure. For a better understanding of the invention, its operating advantages, and specific objects attained by its use, reference should be had to the drawing and descriptive matter in which there are illustrated and described preferred embodiments of the invention.
REFERENCES:
patent: 3625323 (1971-12-01), Hetmann
patent: 3891350 (1975-06-01), Adachi et al.
patent: 5215173 (1993-06-01), Gimmler
patent: 5480012 (1996-01-01), Polubinski
patent: 5813505 (1998-09-01), Olsen
patent: 6099435 (2000-08-01), Halene et al.
patent: 32 22 119 (1983-10-01), None
patent: 41 21 586 (1993-01-01), None
patent: 198 22 665 (1998-12-01), None
patent: 199 10 049 (1999-09-01), None
patent: 198 10 297 (1999-09-01), None
patent: 299 11 867 (1999-12-01), None
patent: 0 333 953 (1989-09-01), None
patent: 06221401 (1994-08-01), None
Illig Roland
Kriz Karel
Schramm Friedrich
Spohn Werner
Cohen & Pontani, Lieberman & Pavane
Look Edward K.
Mannesmann Sachs AG
Nguyen Ninh
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