Damping flywheel, particularly for motor vehicles

Machine element or mechanism – Elements – Flywheel – motion smoothing-type

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

74572, 74573R, 192 7014, F16D 1360, F16F 1512, F16F 1520

Patent

active

057619700

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

1. Field of the Invention
The present invention relates to damped flywheels, especially for motor vehicles, of the kind comprising two coaxial masses mounted for movement of one with respect to the other against the action of circumferentially acting resilient means.
2. Description of the Prior Art
Such a flywheel is described in the document FR-A-92 10 958 published under the number FR-A-2 695 579.
In the latter, the first mass, i.e. the one which is arranged to be fixed to the driving shaft (which is the crankshaft of the internal combustion engine in this case), comprises firstly an axially elongated crown element which carries a starter crown, and secondly, a thinner radial support plate and a disc, which are fixed to the crown element by seaming. The other mass is adapted to be mounted on a driven shaft (i.e. the input shaft of the gearbox in this case), for rotation with the latter.
This arrangement enables sealing to be provided for a cavity which encloses the resilient members, and does not have the disadvantages of riveting, which, in order to provide for the fitting of the necessary rivets, takes up some amount of space in the radial direction.
Because space is economised, it is possible, all things being equal, to locate the resilient members on a circle having an increased diameter, and this leads to an increase, in particular, in the torque that can be transmitted.
In practice, in that document, the radial support plate is of steel, so that during the seaming operation, plastic flow into a groove, formed in the cast crown element can easily be obtained, with the seaming operation leaving a scar on the said radial plate.
As a result, in order that the seaming operation can be carried out, the crown element must have a thickness which takes account of the thickness of the seaming tool and of the size of the groove, and there must be a certain amount of material between the outer periphery of the crown element and its groove, for reasons of mechanical strength. Similarly, the shoulder of the crown element on which the radial plate engages must have a radial depth which takes account of the seaming tool.
As a result, for a given radial size of the damped flywheel, it is not possible to position the resilient members on a circle having an increased diameter.
An additional disadvantage is that, the crown element being a casting, the first mass is not as resistant to centrifugal force as is desirable.
In addition, the radial plate is unable to be made in complex forms.
An object of the present invention is to overcome these drawbacks in a simple and inexpensive way, and accordingly to provide a primary mass which enables the resilient members to be located at an increased diameter, while having improved resistance to the effects of centrifugal force and also affording the possibility of giving the support member for the crown element forms of greater complexity.


SUMMARY OF THE INVENTION

According to the invention, a damped flywheel of the type described above, having a first mass which includes a crown element elongated axially and mounted on a support member, with seaming means being interposed between the said crown element and the said member so as to lock them together, is characterised in that the support member consists of a support plate of mouldable material, in that the crown element is of steel, in that the support plate has at its outer periphery a collar portion projecting radially with a generally axially oriented mounting surface and a generally transversely oriented seaming shoulder, and in that the crown element has a flank for fastening it to the support plate, defining an internal housing for the said collar portion, with a fitting surface which is oriented generally axially and which is initially longer than the mounting surface, such that, after the fitting surface has been fitted over the mounting surface, the material of the end of the fastening flank is upset into contact with the seaming shoulder so as to fasten the crown element on the support

REFERENCES:
patent: 5073143 (1991-12-01), Friedman et al.
patent: 5476166 (1995-12-01), Schierling et al.
patent: 5575183 (1996-11-01), Schierling et al.
patent: 5597059 (1997-01-01), Gebauer et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Damping flywheel, particularly for motor vehicles does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Damping flywheel, particularly for motor vehicles, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Damping flywheel, particularly for motor vehicles will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2189781

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.