Rotary shafts – gudgeons – housings – and flexible couplings for ro – Torque transmitted via flexible element – Coil spring
Patent
1990-12-07
1992-11-17
Stodola, Daniel P.
Rotary shafts, gudgeons, housings, and flexible couplings for ro
Torque transmitted via flexible element
Coil spring
464 68, 1921062, F16D 314
Patent
active
051638754
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
1. Technical Field
This invention relates to a damper disc having plural torsion springs arranged in series in one window hole.
2. Background Art
This kind of damper disc has two torsion springs disposed in series in a window hole in order to maintain a wide torsional angle range. A support member is intervening between the torsion springs in a manner free to move in the circumferential direction.
The present applicant, in the damper disc of the spring series type, as mentioned above, previously developed a structure of linking floats with an annular linkage element to prevent the support members from projection outward in the radial direction by centrifugal force, and filed applications (the Japanese Utility Model Applications Sho. 63-38836, Sho. 63-84777).
In the conventional damper disc, as shown in FIG. 6, herein, a support member 55 occupies a relatively large space in a window hole 16. The space in the window hole 16 can not be used economically and effectively even if the window hole 16 is formed in an extended circumferential length in order to obtain wide torsional ranges.
OBJECT OF INVENTION
An object of the invention is to increase the number of springs disposed in series in a window hole, to maintain a wider torsional angle range, or increase the energy generated in the damper area, by effectively utilizing the space for disposing the support member for disposing sub-torsion springs.
DISCLOSURE OF THE INVENTION
Technical Means
In order to accomplish above object, the invention presents a damper disc forming plural window holes, respectively, in a pair of input side plates and an output plate placed between the side plates, and disposing torsion springs in series in the window holes in a manner free to compress in the circumferential direction. Two torsion springs are disposed before and after in the circumferential direction in the window hole, and a spring support structure movable in the circumferential direction is intervening between the two torsion springs. A pair of spring receiving members, as spring support structure, are rotatably linked, through a hinge part, so that the gap in their circumferential direction may be freely reduced. A sub-torsion spring is compressively disposed between the two spring receiving members, thereby supporting each hinge part to an annular linkage element.
Operation of the Invention
When the input side plates are twisted to the output plate, while traveling, the gap of the two spring receiving members is reduced, and the sub-torsion spring is compressed. In succession, or at the same time, the two series torsion springs, at both sides, are compressed. In the cmpression stroke of the two torsion springs, the support structure moves in the circumferential direction.
At this time, each support structure has the internal circumferential end portion linked integrally by the annular linkage element, so that it will not contact with the peripheral edge of the window hole by projecting outward in the radial direction due to centrifugal force.
BRIEF DESCRIPTION OF DRAWINGS
FIG. 1 is a partially cut-away side view showing a damper disc according to the invention (notch side view in view I of FIG. 2).
FIG. 2 is a sectional view of II--II of FIG. 1.
FIG. 3 is a perspective view of support structure, before adjusting.
FIG. 4 is a partially cut-away side view showing an example of applying in a split hub type damper disc.
FIG. 5 is a torsion characteristic diagram of the structure in FIG. 4.
FIG. 6 is a side view of prior art.
BEST MODE FOR CARRYING OUT THE INVENTION
In FIG. 2 showing a longitudinal sectional view of a damper disc according to the invention (a sectional view of II--II of FIG. 1), an output spline hub 1 is fitted with spline to an output shaft (not shown), and a flange (output plate) 2 extending outward in the radial direction. On both sides of the flange 2, in its axial direction, a pair of input side plates 3 are disposed and are coupled together with rivets 8 at their outer circumferential end portions. At the outer circu
REFERENCES:
patent: 4591348 (1986-05-01), Takeuchi et al.
patent: 4891033 (1990-01-01), Heyser
patent: 4959039 (1990-09-01), Naudin
patent: 4969855 (1990-11-01), Graton et al.
patent: 5052978 (1991-10-01), Hanke
Gayoso Tony A.
Kabushiki Kaisha Daikin Seisakusho
Stodola Daniel P.
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