Joints and connections – Articulated members – Pivoted
Patent
1996-07-12
1998-06-23
Knight, Anthony
Joints and connections
Articulated members
Pivoted
403157, 403288, 403 39, F16C 1102
Patent
active
057695571
ABSTRACT:
Past pin joint assemblies attaching a lift arm to a construction machine have utilized grease lubricated pins. Deflection of the pins during operation caused damage to both the pin and surrounding structure. Additionally, the use of grease requires daily lubrication schedules. The present invention overcomes these and other problems by providing an oil sealed pin joint assembly which virtual eliminates daily lubrication needs. A pin is utilized with a variable profile including first and second end portions which diverge inwardly from a first predetermined diameter and terminate at a second predetermined diameter. The second diameter is in substantial axial alignment with a contact surface of a first and second collar with first and second bearing assemblies, respectively. The pin diverges outwardly from the second diameter and terminates at a third predetermined diameter. A plurality of radii blendingly interconnect the first, second and third diameters. During operation, the pin deflects and the relative location and size of the diameters and radii promotes a uniform distribution of forces across the pin and into the surrounding structure. Uniform distribution of pin forces cause less damage to the pin and surrounding structure.
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patent: 4251182 (1981-02-01), Schroeder
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Beals Charles E.
Vik Timothy A.
Caterpillar Inc.
Charlton Diana L.
Knight Anthony
Perry William C.
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