EP0104823A1
Expired / Lapsed
EP
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Multi-stage torsional damping device
Assignee: Borg Warner Corp
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Filing: 1983-09-08
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Granted: —
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Expires: 2003-09-08
Abstract
Abstract A multi-stage torsional damping device (10) for a vehicle clutch having a low-rate primary stage to eliminate transmission gear rattle occurring during neutral transmission position and a normal rate resilient and friction damping stage. The first stage consists of a low spring rate, frictionless floating suspension of an inner hub (11) within an outer hub (38) to allow the outer hub to oscillate with engine impulses. A medium rate frictionless second stage may be utilized to cushion the torque transference from the first stage to the normal rate last stage and provides compaction of some of the compression springs (59) for the last stage for a given deflection without friction until the hub parts (11,38) abut, and the third stage consists of compaction of all of the compression springs (57,59) and additional deflection with friction. Alternatively, centrifugal weights (71) may be used to lock the inner (11b) and outer hubs (38b) together at a predetermined rotation level, after which a normal damping operation is effected.
Inventors
- 👤 Thaddeus Lech
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 21:31
CPC Classifications
F; F16; F16F; F16F15/00; F16F15/10; F16F15/12; F16F15/121; F16F15/123; F16F15/12353; F16F15/1236; F16F15/12366; F16F15/1202; F16F15/129
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
247 words
In a multi-stage torsional damping device (10) providing a low rate frictionless primary stage to eliminate idle gear rattle and a normal rate final stage with both resilient and friction damping, including a hub assembly having a barrel (12) receiving a transmission input shaft, a clutch driven plate (15) journalled on said hub barrel and carrying annular friction facings (26) at its outer periphery, a spring retainer plate (28) secured in spaced relation to said clutch driven plate by a plurality of stop pins (21), said plates sandwiching said hub assembly therebetween, the improvement comprising a two-part hub assembly including an inner hub (11) having said hub barrel (12) and a pair of oppositely disposed radially outwardly extending flange portions (14,14), an outer hub (38) having an annular ring (39) encompassing said flange portions (14) and integral radially inwardly extending flange portions (43) between the outer hub flange portions, at least said outer hub flange portions having spring windows (47) axially aligned with complementary spring windows in said plates (18), a pair of friction plates (51,51) on opposite sides of said hub assembly and positioned between said hub assembly and said plates, said friction plates being operatively connected to said outer hub, radial gaps (49) between said inner and outer hub flange portions (14,43), at least one idle rattle damper spring (58) operatively connected between said inner and outer hub flange portions, and at least one pair of damper springs (57) received in said aligned spring windows.
Claim 2
Dependent Claim
247 words
In a multi-stage torsional damping device (10) providing a low rate frictionless primary stage to eliminate idle gear rattle and a normal rate final stage with both resilient and friction damping, including a hub assembly having a barrel (12) receiving a transmission input shaft, a clutch driven plate (15) journalled on said hub barrel and carrying annular friction facings (26) at its outer periphery, a spring retainer plate (28) secured in spaced relation to said clutch driven plate by a plurality of stop pins (21), said plates sandwiching said hub assembly therebetween, the improvement comprising a two-part hub assembly including an inner hub (11) having said hub barrel (12) and a pair of oppositely disposed radially outwardly extending flange portions (14,14), an outer hub (38) having an annular ring (39) encompassing said flange portions (14) and integral radially inwardly extending flange portions (43) between the outer hub flange portions, at least said outer hub flange portions having spring windows (47) axially aligned with complementary spring windows in said plates (18), a pair of friction plates (51,51) on opposite sides of said hub assembly and positioned between said hub assembly and said plates, said friction plates being operatively connected to said outer hub, radial gaps (49) between said inner and outer hub flange portions (14,43), at least one idle rattle damper spring (58) operatively connected between said inner and outer hub flange portions, and at least one pair of damper springs (57) received in said aligned spring windows.
Claim 3
Dependent Claim
29 words
A multi-stage torsional damping device as set forth in Claim 1, in which at least said outer hub (38) has elongated notches (41) therein receiving said stop pins (21).
Claim 4
Dependent Claim
74 words
A multi-stage torsional damping device as set forth in Claim 2, in which each said inner hub flange portion (14) includes a central peripheral notch (36) axially aligned with additional spring windows (17) in- said plates, and damper springs (59) in said notches and aligned windows, the length of each notch (36) being greater than the length of the aligned spring windows (17) to provide limited relative rotation between said plates and inner hub.
Claim 5
Dependent Claim
39 words
A multi-stage torsional damping device as set forth in Claim 3, in which said inner and outer hub flange portions (14,43)include facing corner recesses (37,46) receiving idle rattle damper springs (58) yieldably resisting the closing of said radial gaps
Claim 6
Dependent Claim
1 words
(49).
Claim 7
Dependent Claim
1 words
(49).
Claim 8
Dependent Claim
42 words
A multi-stage torsional damping device as set forth in Claim 1, in which said outer hub flange portions (43) each have a notch (48) in each spring window, and said friction plates (51) have oppositely disposed tabs (52) received in said notches.
Claim 9
Dependent Claim
71 words
A multi-stage torsional damping device as set forth in Claim 3, wherein said outer hub ring (38a) and flange portions (43a) include corner notches (64) and said inner hub flange portions (14a) include complementary corner notches (62) to form elongated slots for said stop pins (21a), each inner and outer hub flange portion having at least one facing recess (63,65) in its edge to receive an idle rattle damper spring (58a).
Claim 10
Dependent Claim
74 words
A multi-stage torsional damping device as set forth in Claim 2, wherein each said inner hub flange portion (14b) has a relatively deep notch opening (68) into the outer periphery (35b), a complementary centrifugal weight (71) received in each notch for radial reciprocation therein, and retractor springs (74,74) in each notch for each weight, said weights being adapted to engage the annular ring (39b) of the outer hub to (38b) lock the hubs together.
Claim 11
Dependent Claim
49 words
A multi-stage torsional damping device as set forth in Claim 7, in which said notches (68) and complementary weights (71) are T-shaped with the retractor springs (74) acting against the head (72) of the weight and the stem (73) adapted to project from the periphery of the flange portion.
Claim 12
Dependent Claim
45 words
9 A multi-stage torsional damping device as set forth in Claim 8, wherein said outer hub ring (39b) has a pair of oppositely disposed recesses (75) in the inner periphery (42b) adapted to receive the outer ends of said weights to lock the hubs together.
Claim 13
Dependent Claim
55 words
A multi-stage torsional damping device as set forth in Claim 8, wherein said outer hub ring (39b) and flange portions (43b) and said inner hub flange portions (14b) have complementary corner notches (62b,64b) forming elongated slots for said stop pins (21b) and facing recesses (63b,65b) in the edges receiving idle rattle damper springs (58b) therein.
Claim 14
Dependent Claim
67 words
A multi-stage torsional damping device as set forth in Claim 7, in which said notches (82) and complementary weights (83) are generally U-shaped, the edges of each notch and each weight having facing recesses (84) receiving retractor springs (85), and the inner periphery (42d) of the outer hub ring (39d) having a pair of oppositely disposed recesses (87) adapted to receive the outer ends of the weights.
Claim 15
Dependent Claim
75 words
A multi-stage torsional damping device as set forth in Claim 11, wherein said inner hub flange portions (14d) have corner recesses (81) and said outer hub flange portion has complementary corners (86), and the edges of the flange portions have facing recesses (63d,65d)receiving said idle rattle damper springs (58d), each outer hub flange portion having a pair of spring windows (47d) axially aligned with spring windows in said plates (15d),28d) to receive damper springs (57d).
Claim 16
Dependent Claim
115 words
A multi-stage torsional damping device as set forth in Claim 2, in which said inner hub flange portions (92) have outwardly converging edges (93,93) terminating in arcuate peripheries (94,95), one of said flange portions having a relatively deep generally U-shaped notch (82e) a complementary centrifugal weight (83e) received in said notch, the notch and weight having facing recesses (84e), a pair of retractor springs (85e) received in said facing recesses, the opposite flange portion having a central recess (96), said outer hub ring (39e) having a recess (107) facing said last mentioned recess to receive said idle rattle damper spring (97) and an oppositely disposed recess (106) adapted to receive the end of said weight.
Claim 17
Dependent Claim
73 words
A multi-stage torsional damping device as set forth in Claim 13, in which said outer hub flange portions are segments (108) of a circle formed by substantially parallel chords (98,98) of the outer hub ring, the parallel edges of the outer hub flange portions having recesses (104), and a resilient impact cushion (105) received in each last mentioned recess to be engaged by an edge (93) of an inner hub flange portion (92).
Claim 18
Dependent Claim
45 words
A multi-stage torsional damping device as set forth in Claim 14, in which said friction plates are generally circular back plates (111), each back plate having a pair of oppositely disposed notches (113) axially aligned with said spring windows to receive the damper springs (57e).
References Cited (Backward Citations)
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