The utility model relates to the field of safety pressure limiting devices, in particular to a safety pressure limiting device for a jack. The technical problems that few existing jack pressure limiting devices are provided with buffering assemblies, jacks are prone to being damaged, meanwhile, the existing jacks need to be manually adjusted, time and labor are wasted, and hearing of workers is affected due to the fact that
noise is too large in the using process of the existing jacks are solved. According to the technical scheme, the jack safety pressure limiting device comprises a supporting table and an adjusting rod. Equipment can be moved through the moving
assembly, the problem that manual adjustment is needed by a worker is solved,
noise reduction
processing is conducted on the equipment through the protective shell, and the problem that hearing of the worker is affected due to the fact that sound is too loud in the using process of the equipment is solved; the safety pressure limiting mechanism and the elastic
assembly can give an alarm when the use of the device reaches the limit, and meanwhile, a buffer space is reserved, so that the
fault tolerance in use is increased, and the jack is prevented from being damaged in use.