Patent ID: 8720343

Claim:
An automatic adjusting apparatus, comprising: a cross beam, a driving trolley, and a driven trolley, wherein said cross beam is a drawn cross beam, said driving trolley is laterally spaced apart from said driven trolley, said cross beam is disposed between said driving trolley and said driven trolley, said driven trolley is rigidly connected to one end of said cross beam, said driving trolley and the other end of said cross beam are equipped with an automatic adjusting assembly, wherein said adjusting assembly comprises: a vertical rotating shaft, a rolling bearing, a driving connecting plate, and a disc spring, wherein a bottom surface of said cross beam is connected to said driving connecting plate, a hole for housing said rolling bearing is provided at a center of said driving connecting plate, and with said rolling bearing placed in said hole, a bottom end of said rotating shaft is fixed to said driving trolley with said rotating shaft passing through an upper surface of said driving trolley and said disc spring; wherein said driven trolley and said cross beam are rigidly connected in such a way that said bottom surface of said cross beam is connected to a driven connecting plate and said driven connecting plate is connected to said driven trolley.