| 摘要 |
An apparatus for adjusting the position of a seat comprises a rack and a clock nut that grips the rack. The rack comprises a threaded rod, while the clock nut comprises a short cylindrical body that is drilled and threaded along its diameter with internal threads corresponding to the thread diameter and pitch of the rack. Circumferential reliefs are then formed in the threaded bore to enable the clock nut to be “clocked” from a position in which the threads of the clock nut engage the threads of the rack to a second position in which the threads of the clock nut disengage the threads of the rack. A pair of linkages are provided to rotate the clock nut between the engaged and disengaged positions and to transmit loads from the clock nut. Because the clock nut engages multiple teeth of the rack simultaneously, the seat track locking mechanism of the present invention is capable of extremely fine position adjustment without sacrificing ruggedness and because of the design of the linkages, the seat track locking mechanism locks bi-directionally and with little or no backlash.
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