Rotary shafts – gudgeons – housings – and flexible couplings for ro – Coupling accommodates drive between members having... – Coupling transmits torque via radially spaced ball
Reexamination Certificate
2000-03-10
2001-07-31
Browne, Lynne H. (Department: 3629)
Rotary shafts, gudgeons, housings, and flexible couplings for ro
Coupling accommodates drive between members having...
Coupling transmits torque via radially spaced ball
C464S906000, C464S141000
Reexamination Certificate
active
06267683
ABSTRACT:
BACKGROUND OF THE INVENTION
The invention relates to an assembly which comprises a constant velocity joint and a receiving part. The receiving part serves to receive the outer part of the constant velocity joint.
DE 40 42 390 C2 describes a constant velocity joint with an outer part which is produced as a solid formed part and is approximately annular in shape. The annular cage comprises a hollow spherical inner face. The cage is axially slotted, so that it can be mounted on the spherical outer face of the inner part. Furthermore, the cage comprises a spherical outer face which is enclosed by hollow spherical partial faces of the outer part, so that, for mounting purposes, the outer part is axially divided, as a result of which there are obtained two annular segments. After the inner part, cage and outer part have been mounted, the unit is inserted into a receiving part which encloses the outer face of the outer part. A rotationally fast connection between the outer part and the receiving part is achieved in that the receiving part is formed into recesses in the outer face of the outer part. There is thus obtained a positive, form-fitting connection.
It is an object of the invention to provide an assembly having a constant velocity joint and a receiving part, which assembly permits a lightweight design of the constant velocity joint.
SUMMARY OF THE INVENTION
In accordance with an embodiment of the invention, the objective is achieved by providing an assembly having a constant velocity joint which comprises an outer part which is axially open at both ends, an inner part, a cage and balls. The outer part and the inner part are provided with running grooves for receiving balls, and the cage serves to guide the balls. Furthermore, the outer part is formed of plate metal and, at one axial end, comprises a formed-on flange. Towards the other axial end, on its outside, the outer part is provided with a cylindrical centering face. Furthermore, the flange is provided with through-bores for fixing bolts. A receiving part is also included which comprises a cylindrical centering bore for centrically receiving the outer part by means of the centering face, and threaded bores which are arranged so as to correspond to the through-bores. The fixing bolts are threadable into the threaded bores of the receiving part.
One advantage of the above embodiment is that the outer part can be formed from plate metal in a non-chip producing way. The dimensional stability is ensured at one axial end by the flange and, at the other axial end, by the receiving part being in which the outer part is received in a centered way, so that even if the constant velocity joint is subjected to high loads when under torque or operating at an angle, deformation at the outer part occurs to the required extent only. Because it is possible to use a formed plate metal part, material utilization can take place to a greater extent than this is normally the case with solid components.
The face of the outer part can be provided in the form of an uninterrupted cylindrical face. However, it can also be interrupted in the circumferential direction. This means that there are obtained partial centering faces which, in the case of a constant velocity joint with a plate metal outer part, are provided in the outwardly curved regions of those portions which contain the outer running grooves. To achieve an uninterrupted centering face, it is possible to provide upset webs on the side facing away from the flange, in the region between the circumferentially adjoining outwardly curved portions containing the outer running grooves. The centering face can axially extend in portions along the entire length between the flange and the axial end facing away from the flange, but it can also be concentrated on only some regions along a short part of the length, in the region of the end facing away from the flange. This is always advantageous in those cases where upsetting takes place in the region between two circumferentially adjoining outer running grooves.
In a preferred embodiment, the flange is tensioned against a contact face of the receiving part. It is also possible to arrange an intermediate ring between the flange and the contact face. The intermediate ring can be used for damping vibrations, for example.
Furthermore, the receiving part can be used to close the axial end of the outer part which is removed from the flange. Furthermore, it is proposed in accordance with the invention to provide a cap which axially covers the outside of the flange and axially extends over part of the outer face of the receiving part. Between the portion covering the receiving part and the receiving part, there is provided a seal. Furthermore, the cap is used to attach a convoluted boot which serves to seal the constant velocity joint relative to a shaft connected to the inner part of the constant velocity joint.
Other objects and advantages of the invention will become apparent from reading the following detailed description and appended claims, and upon reference to the accompanying drawings.
REFERENCES:
patent: 3106077 (1963-10-01), Sharp
patent: 3204429 (1965-09-01), Kayser
patent: 3367139 (1968-02-01), Ristau
patent: 4000629 (1977-01-01), Bellomo
patent: 5334096 (1994-08-01), Iwao
patent: 40 42 390 C2 (1995-07-01), None
patent: 43 10 008 C2 (1996-07-01), None
patent: 296 16 432 U1 (1996-12-01), None
patent: 297 21 218 U1 (1998-04-01), None
patent: 0 463 531 A1 (1992-01-01), None
patent: 2 295 440 (1996-05-01), None
patent: 2 331 572 (1999-05-01), None
patent: 9-151950 (1997-06-01), None
Browne Lynne H.
Dunwoody Aaron M
GKN Lobro GmbH
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