Machine element or mechanism – Control lever and linkage systems – Hand operated
Patent
1985-12-20
1987-04-14
Herrmann, Allan D.
Machine element or mechanism
Control lever and linkage systems
Hand operated
74522, 74540, 74571M, 74577M, B62D 118, G05G 524
Patent
active
046568875
ABSTRACT:
This tiltable steering column is for an automotive vehicle, and includes a main steering shaft made up from a lower steering shaft and an upper steering shaft tiltably rotationally connected to the lower steering shaft, and a column tube assembly which includes a lower tube which rotatably supports the lower steering shaft from the body of the automotive vehicle and an upper tube which rotatably supports the upper steering shaft and is pivotally mounted so as to be able to tilt relative to the lower tube. A tilt locking mechanism also included in the steering shaft includes a first side ratchet mechanism on one side of the column tube assembly and a second side ratchet mechanism on the other side of the column tube assembly. Each such side ratchet mechanism includes a ratchet fixedly attached to one of the upper tube and the lower tube, a pawl pivotally attached to the other of the upper tube and the lower tube, a means which acts constantly for biasing the pawl so as to engage it with the ratchet, and a means for selectively biasing the pawl so as to release its engagement with the ratchet. And the tilt locking mechanism also includes a means for coupling the operation of the two pawl releasing means together, and a means for shifting the axis of pivotal rotation of one of the pawls. Thereby errors in manufacture and assembly can be compensated for by adjusting the axis of pivotal rotation of this pawl, thus assuring good operability and assemblability of the steering shaft.
REFERENCES:
patent: 2188635 (1940-01-01), Dusen, Jr.
patent: 3302478 (1967-02-01), Pauwels
patent: 3628396 (1971-12-01), Grobowski
patent: 4084449 (1978-04-01), Kine
patent: 4530254 (1985-07-01), Toyoda et al.
patent: 4538477 (1985-09-01), Kurusu et al.
patent: 4538478 (1985-09-01), Sato et al.
Herrmann Allan D.
Toyota Jidosha & Kabushiki Kaisha
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