Prevent loosening of five kinds of measures automotive thread to help you easily get
Time：2013.08.06 Come：Yuhuan, teyu machinery Co., LTD fan clutch View：
Vice connected securely threaded car or a direct impact on car use, in the design of this car using the corresponding anti-loosening measures are commonly used in friction locking spring pad lock, preload or special self-locking locking screw, etc.; mechanically locking a locking cotter pins, locking latch, fuses, anti-loose and so on.
According to Yu-fan clutch special note, spring washers, easy installation, low manufacturing cost, is widely used in the car. It is the elastic deformation of the gasket, the screw vice axial tension, while the gasket beveled tip also helps lock. However, this washer is in use due to heat or prolonged compression and lose their elasticity. Therefore, before you install spring washer, you should check whether the failure of its elasticity. Checking method is to look at both ends of the upper and lower gasket interface are staggered at a certain degree, or if it does not stagger stagger angle is small, this washer has timed out. Meanwhile, washers size should correspond with the size of the mating bolts, washers, nuts OD OD little kid appropriate.
If the engine connecting rod bolts loose, can cause connecting rod bearing Songkuang, the engine produces abnormal noise, or even damage the engine related parts. Decomposition check some rod bearing failure abnormal sound, often find that an individual connecting rod bolt lock nut cotter pin has gone, and its cause is due to the cotter pin is too long, high-speed movement of the crank arm scraping hit to break, finally off. Determine the correct length cotter way is to open the lock pin into the corresponding hole of the nut, hand percussion hammer in place, the opening does not exceed the length of the pin projecting crank arm plane, and required that the cotter pin lock available.
Disc spring washer for mechanical surface does not produce more scratches, and thus increasing use of the car, but if not installed properly, it will not serve to prevent loosening collaboration with thread. For example: EQ1090 Dongfeng Automobile Transmission second shaft rear flange nut dish installed between the flange gasket dread spring, if the nut loose resulting in improper installation will cause the speedometer drive gear slipping, the speed indicator and odometer Mileage is generated between the errors. Meanwhile, the second shaft third gear before leaving the rocky ledge jump occurs file. Correct orientation should be a concave conical spring washers toward the connecting member, convex surface facing the nut. Tighten the nut so that, due to the force deformation disc spring washers, bearing surface reaction and play by locking effect.
According to special margin fan clutch is understood that some parts of the car chassis (eg shift fork and shift fork shaft connecting bolts) an insurance wire to prevent thread loosening, it is often used in a threaded locking bolt group. Insurance locking wire is more reliable, but the installation should pay attention to the selection and specifications of the insurance penetration wire screw hole after pulling direction. Insurance is not easy to go through the wire is too thick, the diameter should be slightly smaller than the diameter of the perforations, interspersed with a slight resistance when you can. Difference between the insurance penetration in the right direction or not wire method is: If a bolt loosening, insurance wire in tension state, that will loosen a bolt tensioning the adjacent two screws to the correct otherwise incorrect.
