Cross-type earthquake platform

摘要

A cross-type earthquake platform includes a bearing block, two guide rails, two roller holders and multiple needle rollers. The bearing block has sliding grooves located at opposing top and bottom walls thereof and respectively extended in X-axis and Y-axis, and needle roller guide grooves located in horizontal bottom wall and upright sidewalls of each sliding groove. Each guide rail has needle roller guide grooves located at the top wall thereof. The needle rollers are mounted in the roller holders to support the guide rails at the opposite top and bottom walls of the bearing block. Further, retractable dust covers are respectively capped on the guide rails to protect the needle rollers against external dust.

主权项

1. A cross-type earthquake platform, comprising a bearing block having opposing top wall and bottom wall, two guide rails respectively slidably coupled to the opposing top wall and bottom wall of said bearing block, a plurality of roller holders respectively set between said bearing block and said guide rails, and a plurality of needle rollers accommodated in said roller holders and rotatably kept in contact between said bearing block and said guide rails, wherein said bearing block comprises two pairs of parallel sliding grooves respectively and symmetrically located at the opposing top wall and bottom wall thereof in a crossed manner, at least one first needle roller guide groove disposed in a bottom wall of each said sliding groove in parallel to the respective said sliding groove, and a second needle roller guide groove disposed in each of two opposing upright sidewalls of each of said sliding grooves in parallel to the respective said sliding groove; said guide rails are respectively slidably coupled to said sliding grooves of said bearing block, each said guide rail comprising at least one third needle roller guide groove longitudinally located at a top wall thereof and disposed to face toward one respective said first needle roller guide groove, and a fourth needle roller guide groove longitudinally located at each of two opposite upright sidewalls thereof and respectively disposed to face toward one respective said second needle roller guide groove; said needle rollers are respectively rotatably mounted in said roller holders and respectively rotatably accommodated between said first needle roller guide grooves and said third needle roller guide grooves and between said second needle roller guide grooves and said fourth needle roller guide grooves for enabling said guide rails to be moved relative to each other on the opposing top wall and bottom wall of said bearing block.