In Ecdesign 4.7 you can import Sketchup files. See the video to learn the steps on how to use Sketchup files from 3D Warehouse, the world's largest 3D Sketchup library.
UPDATE - In August 2021 3D Warehouse removed Sketchup files in 2018 format. We have released a patch update, which will add support for Sketchup 2020 and 2021. You need to download and run the patch update.
The patch file is available below.