Railroad car draft gear assembly with friction bore wear liners

Details Railroad car draft gear assembly with friction bore wear liners Railroad car draft gear assembly with friction bore wear liners

1984-08-17

1986-05-27

Scherbel, David A.

Railway draft appliances

Cushioned

Combined spring and friction

213 24, 267 9A, B61G 918

Patent

active

045910596

ABSTRACT:
A draft gear assembly to cushion and absorb impacting forces on a railroad car coupler system includes a housing containing a spring package. Through a follower the spring package interacts with a set of friction shoes. The shoes are positioned in friction shoe seats in a friction bore section of the housing. Each seat includes a wear liner in a recess formed on an inner surface of the housing friction bore section. The shoes in turn engage a wedge which extends from the housing to connect with other elements of the coupler system. The liners are made of a selective steel initially deformed by the impacting forces. This deformable quality allows wider dimensional variations between the shoes, liners, and the housing recesses. After deformation the liners fit properly in the recesses and the shoes in the seats to optimize areas of contact therebetween. During subsequent operation of the car the impacting forces work harden the liners to a level selectively less than the hardness of the shoes to further increase wear resistance. Because the liners may be readily removed and replaced, a useful life of the housing may be extended indefinitely.

REFERENCES:
patent: 981790 (1911-01-01), O'Conner
patent: 2079845 (1937-05-01), Eastburg
patent: 2159457 (1939-05-01), Sproul
patent: 2475670 (1949-07-01), Lounsbury
patent: 2540561 (1951-02-01), Williams
patent: 2667277 (1954-01-01), Mulcahy
patent: 2703297 (1955-03-01), MacLeod
patent: 3348633 (1967-10-01), Allan
patent: 4194794 (1980-03-01), Kling

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