Vehicle structural member bolt connection pre-tightening force monitoring device

The utility model discloses a vehicle structural member bolt connection pretightening force monitoring device, which relates to the technical field of bolt connection pretightening force monitoring and comprises a base, a storage battery is arranged in the base, a first mounting seat is connected to the top of the storage battery, a first detection disc is fixedly connected to the top of the first mounting seat, and a second detection disc is fixedly connected to the top of the first detection disc. A first stress disc is fixedly connected to the middle of the first detection disc on the first mounting seat, a spring is fixedly connected to the top of the first stress disc, a second stress disc is fixedly connected to the top of the spring, and a second mounting seat is fixedly connected to the top of the second stress disc; and a second detection disc is fixedly connected between the second stress discs at the bottom of the second mounting seat, and a controller is arranged on one side of the base. According