Foldable gasket for unilateral bolt

The utility model discloses a foldable gasket for a unilateral bolt. The device comprises a mounting plate, a protection plate is movably connected to the left side of the mounting plate, a groove isformed in an inner cavity of the protection plate, a screw rod is arranged in the inner cavity of the mounting plate in a penetrating mode, a nut is fixedly connected to the left side of the screw rod, a first gasket sleeves the left side of the surface of the screw rod, and the right side of the first gasket makes contact with the left side of the mounting plate. According to the utility model, the mounting plate, the first gasket, the screw cap, the protection plate, the filling pad, the screw rod, the nut, the second gasket, the push plate, the transmission rod, the reset mechanism, the sliding rod, the sliding groove, the reset spring, the folding hole, the folding connecting pin, the clamping block and the groove are matched for use; according to the unilateral bolt, the problems thatwhen an existing unilater