Looseness prevention tensile force measuring gasket

Abstract

The invention relates to the technical field of bolt accurate locking, measurement and looseness prevention, in particular to a looseness prevention tensile force measuring gasket. The looseness prevention tensile force measuring gasket comprises an upper ring, an upper gasket, a lower gasket, a check ring, a wave crest spring, a hexagonal gasket, a round head pin, a strain gauge, a data wire anda data interface, the upper end surface of the upper ring is an inverse tooth, and the lower end surface of the upper ring cooperates with the upper end surface of the upper gasket; the lower end surface of the upper gasket cooperates with the upper end surface of the lower gasket, and the lower end surface of the lower gasket cooperates with the upper end surface of the hexagonal gasket; and thelower end surface of the upper gasket and the upper end surface of the lower gasket are both grinding end surfaces. In the situation of the large-torque, high-precision and looseness prevention, the looseness prevention tensile force measuring gasket is mainly used for solving the problems that bolts cannot obtain accurate tensile force and looseness due to high-torque high-precision requirements,a lot of bolts cannot be accurately tightened and prevented from loosing. According to the looseness prevention tensile force measuring gasket, the principles of mechanical locking, looseness prevention, strain gauge force measurement and the like are applied, concentric tightness is achieved, the torque is accurate, the tensile force is accurate, accurate measurement is achieved, and the gasketis accurate and anti-loose.

Description

technical field [0001] The invention relates to the technical field of precise locking, measurement and anti-loosening of bolts, in particular to an anti-loosening tensile force-measuring washer. Background technique [0002] Lock washers are parts placed between nuts and bolts. It is generally used to protect the surface of the bolt from being scratched by the nut, to disperse the pressure of the nut on the bolt, and to prevent the nut and the bolt from loosening each other. [0003] General anti-loosening washers known in the prior art (such as figure 1 (shown) is composed of the same two pieces whose upper end surface is reverse teeth, lower end surface is cis teeth, and the tooth profile angle is smaller than the lead angle of the secondary thread of the bolt. The upper end surface of the upper piece (11) is a counter-toothed surface. When the nut is locked to this surface, the lower end surface of the nut engages with it counterclockwise, and the nut can be tightened ...

AI Technical Summary

Problems solved by technology

However, the above anti-loosening washers have the following disadvantages: the eccentric load lateral force during the tightening process cannot be eliminated, and accurate torque cannot be obtained; the compressed surface during the entire tightening process is rough and uncontrollable, and the loss torque is large, which cannot be estimated or Check the effective tensile force of the bolts; the torque required to loosen the bolts is much greater than the torque when tightening them, which may easily lead to plastic deformation or fracture of the bolts and failure

However, the above-mentioned anti-retraction tension washers have the following disadvantages: the friction surface is tight to a smooth surface on the upper end surface of the hexagonal washer 22, and the effective torque cannot be accurately controlled; the smooth upper end surface of the hexagonal washer 22 can reduce friction, but it is in the absence of other locking mechanisms or Under the conditions of the method, the lock nut is more likely to loosen, thereby causing the failure of the bolt pair, and the safety is low; when the threaded ring 21 is stretched to the top surface in the hexagonal washer 22, the washer fails, cannot be reused, and the economy is low ; It is impossible to accurately display or measure the effective tensile force on the tensioned bolt, so that the consistency of the tensile force of all bolts on the locked workpiece cannot be guaranteed, and it is easy to cause the bolt pair with the largest tensile force on the bolt to fail first, which may cause lead to security incidents

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