Rotary shafts – gudgeons – housings – and flexible couplings for ro – Torque transmitted via flexible element – Plural circumferentially spaced elements
Patent
1988-04-08
1990-07-03
Stodola, Daniel P.
Rotary shafts, gudgeons, housings, and flexible couplings for ro
Torque transmitted via flexible element
Plural circumferentially spaced elements
1921061, F16D 1364
Patent
active
049387294
DESCRIPTION:
BRIEF SUMMARY
(Applicable Field)
The present invention relates to an improvement of a damper disk of a rubber-series type using elastic members made from rubber.
(Background Art)
The applicant has already developed a clutch disc shown in FIG. 4 and has filed an application for it as Japanese Utility Model Application 58-87448 and published Dec. 19, 1984 as Patent Publication 59-191426.
In FIG. 4, a spline hub 10 is provided with at least two radial first arms 12, 12a, and cylindrical rubbers 18 are disposed between the first arms 12, 12a and retainer plates 14, 14a with rubber sheets therebetween, respectively.
In FIG. 4a illustrating a section taken along line a--a in FIG. 4, when the cylindrical rubbers 18 are compressed, the retainer plates 14, 14a having relatively small thickness of t compress the rubber sheets 16 and the cylindrical rubbers 18, so that the rubber sheets 16 largely deflect and bend as shown at image line in the figure, and in a extreme case, they may break.
(DISCLOSURE OF INVENTION)
It is an object of the invention to provide a damper disk of a rubber-series type, overcoming the above problems, in which it is possible to prevent large deflection of sheets which transmit compression force to elastic members made from rubber.
(STRUCTURE OF INVENTION)
(1) Technical Means
According to the invention, a damper disk of a rubber-series type includes a spline hub continuously provided with a radial hub flange in which at least two first arms are formed, two side plates disposed at opposite sides of the hub flange, retainer plates disposed between the hub flange and the side plates and including second arms faced to the first arms, and elastic members made from rubber and disposed between the both arms and in openings formed in the side plates; and is characterized in that the second arms of the retainer plates are provided with support members made from elastic material having a high rigidity and operable to increase pushing force transmitting area from the second arms to the elastic members, and end surfaces of the support members facing to the elastic members are projected by predetermined distance in directions of the rubber members beyond the end surfaces of the second arms facing to the elastic members.
(2) Operation
The end surfaces of the support members having large area transmit a compression force to the elastic members of the rubber prior to the end surfaces of the second arms, so that the rubber sheets are prevented from deflection.
Torsional characteristics at an initial stage is adjusted by the elasticity of the support members itself.
(BRIEF DESCRIPTION OF THE DRAWINGS)
FIG. 1 is a plane view of a clutch disk employing a first embodiment of the invention,
FIG. 2 is a sectional view taken along line II--II in FIG. 1,
FIG. 3 is a sectional view taken along line III--III in FIG. 1,
FIG. 3a is fragmentary sectional view illustrating a fully compressed cylindrical rubber,
FIG. 3b is a fragmentary sectional view illustrating a second embodiment of the invention,
FIG. 4 is a plane view illustrating the prior art of my Japanese Publication 59-191426, and
FIG. 4a is a sectional view taken along line a--a in FIG. 4.
(Best Mode for Carrying Out the Invention)
(1) First embodiment
In FIG. 1 illustrating a clutch disk for an automobile in which the invention is employed, portions same as or corresponding to those in FIG. 4 bear same reference numerals.
In FIG. 2 illustrating a section taken along line II--II in FIG. 1, a spline hub 10 is splined to an output shaft (i.e., input shaft of a transmission), shown only by a center line O--O, and is continuously provided with first arms 12, 12a which extend radially outwardly therefrom to form a hub flange. Side plates, i.e., a clutch plate 20 and a retaining plate 22, which are located at opposite sides of the arms 12, 12a with predetermined axial spaces therebetween, are rotatably disposed around the hub 10. The outer peripheral portion of the clutch plate 20 is fixed to a friction facing 26 by means of cushioning plates 24.
At the right portio
REFERENCES:
patent: 2964930 (1960-12-01), Aira et al.
patent: 4601677 (1986-07-01), Takeuchi
Hamada Tooru
Nishimura Yoshio
Ohga Syogo
Kabushiki Kaisha Daikin Seisakusho
Stodola Daniel P.
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