Rotary shafts – gudgeons – housings – and flexible couplings for ro – Torque transmitted via flexible element – Coil spring
Patent
1996-01-22
1998-07-14
Stodola, Daniel P.
Rotary shafts, gudgeons, housings, and flexible couplings for ro
Torque transmitted via flexible element
Coil spring
192212, F16D 366
Patent
active
057795509
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention concerns torsion damping devices, notably for motor vehicles, of the type having one input part and one output part coupled elastically by means of two phasing washers each mounted freely on one of the parts.
2. Description of the Prior Art
Such a damping device is described, for example, in the document U.S. Pat. No. 4,139,995, and therefore has two coaxial parts mounted so as to move angularly with respect to each other counter to elastic means with circumferential action, comprising elastic members acting between lugs offset circumferentially and belonging to two phasing washers which are the image of each other.
In this document, the input part is formed by a housing in two parts and the output part by a hub fluted on the inside, and the phasing washers are mounted so as to rotate with respect to the two coaxial parts.
More precisely, the phasing washers are pivotally mounted on the hub and each have radial arms for the bearing of elastic members with circumferential action.
These washers are offset circumferentially so that three sets of springs are mounted in series between two consecutive bearings borne by the housing.
One of the sets of springs bears on the bearing of the housing and on a lug of one of the phasing washers, while another one of the sets of springs is interposed circumferentially between the aforementioned phasing lug and a lug of the second phasing washer. Finally, the third set of springs is mounted between the bearing of the housing and the lug of the second phasing washer.
In practice, the shape of these phasing washers is tortuous, since they are mounted on each side of a web, of a single piece with the hub.
The inner periphery of a phasing washer is thus axially offset with respect to its outer periphery.
The object of the present invention is to overcome this drawback and therefore create a torsion damping device with simplified phasing washers.
SUMMARY OF THE INVENTION
According to the invention, a torsion damping device of the aforementioned type is characterised in that the two phasing washers are mounted in the same plane, in reverse orientations and concentrically, one of the washers, referred to as the outer washer, surrounding the other washer, referred to as the inner washer, in that the lugs of the inner washer are directed in a direction opposite to the axis of the assembly, while the lugs of the outer washer are directed towards the axis of the assembly, and in that the inner washer is pivotally mounted on a first one of the said coaxial parts of the torsion damping device, while the outer washer is pivotally mounted on the said first or the said second part of the torsion damping device.
By means of the invention, the phasing washers can be simple in shape. These phasing washers can be manufactured by cutting out on a press, the material for the inner phasing washer being taken from the waste from the outer phasing washer.
In one embodiment, the outer phasing washer is pivotally mounted on the lugs of the inner phasing washer. In another embodiment, the outer phasing washer is pivotally mounted on lugs belonging to the second of the said coaxial parts, the inner phasing washer being pivotally mounted on the said first of the coaxial parts.
In one embodiment, the second of the parts of the torsion damping device has lugs for the bearing of the elastic members in question, the said lugs being cut out for the passage of fingers belonging to the second of the coaxial parts of the torsion damping device.
These fingers are suitable for each acting on a dish interposed between the circumferential end of the spring or springs in question and the lug associated with the second coaxial part of the torsion damping device in question.
By virtue of this arrangement, it is possible to obtain a torsional damper with a large angular movement.
This torsion damping device can belong to a friction disc, as mentioned in the document U.S. Pat. No. 4,139,995. As a variant, this torsion damping device can bel
REFERENCES:
patent: Re33984 (1992-07-01), Spitler
patent: 893794 (1908-07-01), Giradot
patent: 1445716 (1923-02-01), Robinson et al.
patent: 1518360 (1924-12-01), Royce
patent: 1648110 (1927-11-01), Cartlidge
patent: 1820749 (1931-08-01), Loeffler
patent: 2909911 (1959-10-01), Spaetgens
patent: 3050166 (1962-08-01), Cunningham
patent: 3810533 (1974-05-01), Densow
patent: 4027757 (1977-06-01), Radke et al.
patent: 4139995 (1979-02-01), Lamarche
patent: 4484898 (1984-11-01), Kohno
patent: 4591348 (1986-05-01), Takeuchi et al.
patent: 5168773 (1992-12-01), Janiszewski
Annic Pascal
Chasseguet Gustave
Ginaldi Michel
Stodola Daniel P.
Strimbu Gregory J.
Valeo
LandOfFree
Torsion damping device, notably 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 Torsion damping device, notably for motor vehicles, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Torsion damping device, notably for motor vehicles will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1876527