Ensure the verticality of the screw inspection installation. The connecting rod screw and the nut assembly bearing surface should be parallel to each other. Insurance or self-locking devices are indispensable. When the tightened connecting rod is checked and the nut is loosened, the pre-tightening force of the bolt will change (decrease). In order to maintain the specified pre-tightening force, the insurance or self-locking device must be effective and reliable. . Do not miss the positioning sleeve. When the connecting rod of the oblique cut is stretched by the inertial force, a component force acts on the thread check of the connecting rod in the direction of the slit, so that the screw check of the connecting rod is subjected to the shearing force. In order to offset the effect of shear force on the screw inspection, the positioning sleeve (pin) is used for positioning. In the assembly, the positioning sleeve (pin) must not be missed, and the joint surface is clean, burr-free and tightly fitted. Replace the bearing pads in time. If the bearing bush clearance is too large, the operation will be unstable and there will be an impact phenomenon. The bearing bush should be replaced in time to prevent the occurrence of alternating stress and cause the screw inspection to break. Change parts on time. The screw thread inspection time is too long to be fatigue fracture. Generally, about 600-700Oh should be used for preventive replacement to avoid the occurrence of broken screw inspection accidents.
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