| 摘要 |
A locking mechanism for an elevatable lift platform, having a work platform, a scissor-jack and a locking mechanism, is utilized to elevate a chassis for straightening or other repairs. The scissor-jack is contracted by a power actuator, thereby increasing the scissor-jacks' vertical height and elevating the platform. The locking mechanism is comprised of a herringbone lock arm and a lock actuator assembly. The lock assembly is positioned on the power actuator and comprises a two locks, a pneumatic cylinder for extending and contracting the locks vertically, and a lock retainer bar for restricting the extension of the locks. The locks incrementally move along the lock arm horizontally as the jacks are contracted or extended. The locks engage grooves located between teeth on the lock arm that prevent the jacks from contracting or expanding. The locks can disengage the grooves if the pneumatic cylinder is activated to release the locks.
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