Motor vehicles – Transmission mechanism – With particular drive coupling
Patent
1990-05-02
1992-02-04
Rice, Kenneth R.
Motor vehicles
Transmission mechanism
With particular drive coupling
180344, 264262, 464 89, B60K 1700
Patent
active
050852892
ABSTRACT:
A resilient, torque-transmitting coupling is utilized to coaxially interconnect driving and driven shafts. The coupling has a hollow outer member whose interior surface circumscribes an axis and has a square cross-section. An inner member having a slightly smaller square cross-section is axially received in the outer member and defines therein a square cross-sectioned cavity which laterally circumscribes the inner member. The cavity is filled with a resilient urethane material which is bonded to the laterally facing surfaces of the inner and outer coupling members. Corner portions of the inner member cooperate with the flat interior side surface portions of the outer member to limit relative axial rotation between the inner and outer members to thereby torsionally stress the urethane essentially entirely in tension and compression, and to prevent torsional "spin-out" between the inner and outer members. Because the urethane is bonded to each of the coupling members, its entire volume is efficiently utilized to resiliently resist relative displacement between the inner and outer coupling members. The coupling may be conveniently formed by pouring liquid urethane into the internal cavity and then suitably hardening and curing the urethane in place within the coupling. In one applicational embodiment, the coupling is incorporated in a replacement drive shaft section of a diesel truck drive train and functions to prolong the operating life of the drive train while at the same time significantly reducing the amount of drive train torsional shock and vibration transmitted to the driver of the truck.
REFERENCES:
patent: 2691283 (1954-10-01), Stover
patent: 3859821 (1975-01-01), Wallace
patent: 4033020 (1977-07-01), Hudgens
patent: 4548591 (1985-10-01), Haldric et al.
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