Pressure limiting device for gearbox

The utility model provides a pressure limiting device for a gearbox, and belongs to the technical field of gearboxes. The problem that in the prior art, the oil pump is damaged due to too high oil pump pressure is solved. A pressure limiting device for a gearbox comprises a valve body, a valve cavity is formed in the valve body, a pressure inlet cavity communicated with an oil pump and a pressure relief cavity communicated with the interior of the gearbox are formed in the inner wall of the valve cavity, and a valve element is arranged in the valve cavity and can move to enable the pressure inlet cavity to be communicated with the pressure relief cavity. And a reset elastic piece for resetting the valve core to cut off the communication between the pressure inlet cavity and the pressure relief cavity is also arranged in the valve cavity. The pressure limiting device for the gearbox prevents the oil pump from being damaged due to the fact that the pressure of the oil pump is too high when the oil pump continue