Device for locking/unlocking rotation of an eccentric bearing us

Details Device for locking/unlocking rotation of an eccentric bearing us Device for locking/unlocking rotation of an eccentric bearing us

1986-06-19

1987-08-18

Levy, Stuart S.

Bearings

Rotary bearing

Plain bearing

123 48B, 123 78BA, F16C 2302, F02D 1302

Patent

active

046873481

ABSTRACT:
A device for locking/unlocking rotation of an eccentric bearing interposed between a piston-pin and a connecting rod of an internal combustion engine for changing the compression ratio of the engine. The eccentric bearing has two lock holes, two guide grooves extending circumferentially from the lock holes and two colliding surfaces. The connecting rod has at least one lock-pin hole and a lock-pin is slidably inserted in the lock-pin hole. When the lock-pin is driven toward the eccentric bearing, the lock-pin can move toward the eccentric bearing and can engage the lock hole, thereby locking the rotation of the eccentric bearing. Since the colliding surfaces are provided opposed to said guide grooves, the lock-pin can reliably engage one of the lock holes without jumping the lock hole whether the eccentric bearing rotates in a normal direction or in a reverse direction. As a result, a reliable changing between a high compression ratio and a low compression ratio can be obtained.

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