阅读说明：本技术 一种防松螺母组件 (locknut assembly ) 是由 许润柱 于 2019-08-13 设计创作，主要内容包括：本申请公开了一种防松螺母组件,包括螺杆、可塑性锁定装置和前后螺母,前螺母、中间的可塑性锁定装置和后螺母由螺杆贯串,螺母的形状可以是任何形状,也可以是任何类型,只要中间可塑性锁定装置能够锁定前螺母和后螺母成为一体就可以,前后两个螺母中一个螺母的螺孔是标准的或另非标准的,另一个螺母的螺孔是非标准的,标准螺孔的螺母起一个紧固作用现叫它紧固螺母,非标准螺孔的螺母起一个防松作用现叫它防松螺母,非标准螺孔的螺母的螺孔较标准螺母孔的间隙要加大或非标准螺孔的螺母的螺孔逐渐向标准螺母方向等距扩展呈截头圆锥形或非标准螺孔的螺母的螺孔在标准螺母端没有螺纹另一端有与标准螺母相同的螺纹。(The application discloses a locknut component, which comprises a screw, a plasticity locking device, a front nut, a middle plasticity locking device and a back nut, wherein the front nut, the middle plasticity locking device and the back nut are penetrated through by the screw, the shape of the nut can be any shape or any type, as long as the middle plasticity locking device can lock the front nut and the back nut into a whole, the screw hole of one nut in the front nut and the back nut is standard or non-standard, the screw hole of the other nut is non-standard, the nut of the standard screw hole plays a fastening role and is called the fastening nut, the nut of the non-standard screw hole plays a locking role and is called the locknut, compared with the gap of the standard nut hole, the screw hole of the nut with the nonstandard screw hole is required to be larger, and gradually expands towards the standard nut direction at equal intervals to form a truncated cone shape or a screw hole of the nut with the nonstandard screw hole.)

1. A locknut component is characterized by comprising a screw, a plastic locking device and two front and rear nuts, wherein the front nut, the plastic locking device and the rear nut are penetrated through by the screw;

The screw hole of one nut of the front nut and the rear nut is standard, and the screw hole of the other nut is standard;

the screw holes of the nut of the non-standard screw hole gradually expand towards the standard nut at equal intervals to form a truncated cone shape;

The plastic locking device is a plastic locking washer or a plastic locking device solidified on one of the nuts, and the front nut and the rear nut are locked to form an integral component.

2. a locknut assembly as claimed in claim 1 wherein one of the front and rear nuts has a male locator and the other nut has a female threaded bore or female annular bore, the male locator engaging the female threaded bore or female annular bore; or one of the front nut and the rear nut is a small nut, the other nut is a large nut with an eccentric concave annular hole, and the small nut is matched with the large nut in the inner diameter of the eccentric concave annular hole;

the nut positioner is eccentrically convex or centrically convex, the convex positioner is centrically convex or a small nut matched with a nut of an eccentric concave threaded hole or a concave annular hole, or the positioner is centrically convex matched with a nut of an eccentric opening clamp spring arranged in a centrically concave threaded hole or a concave annular hole; the convex positioner is eccentrically convex and is matched with a nut of the positive concave threaded hole or the concave annular hole; the eccentric raised retainers are formed with a tapered outer periphery having a triangular, knife-edge, or trapezoidal front view, or with projections cured on the nut having a triangular, knife-edge, or trapezoidal front view.

3. a locknut assembly as claimed in claim 2 wherein the back nut is rotated and the small nut or retainer is inserted into the recessed threaded trapezoidal or annular hole and under the action of the retainer or small nut the inner peripheries of the front and back nuts are coaxial with the screw on one side and offset from the screw on the opposite side.

4. A locknut assembly as claimed in claim 2, wherein the nut replacement screw hole which has a larger clearance than the screw hole of the nut of the standard screw hole is used to gradually expand the nut in a truncated cone shape toward the nut of the standard screw hole at an equal distance, or the nut replacement screw hole which has no screw thread at the nut end of the standard screw hole and has the same screw thread as the standard nut at the other end is used to gradually expand the nut in a truncated cone shape toward the nut of the standard screw hole at an equal distance.

5. a locknut assembly as claimed in claim 1, 2 or 4 wherein the screw is a plain screw or the screw has a recess to engage with a protrusion on the inner edge of the mouldable locking washer.

6. A locknut assembly as claimed in claim 1, 2 or 4 wherein the mouldable locking means locks the front nut and the rear nut mounted on the same screw into an integral unit;

The plastic locking device is solidified on one of the nuts to lock the front nut and the rear nut, one of the front nut and the rear nut is a small nut, the plastic locking device is solidified on the front end of the eccentric concave annular wall of the large nut, and the small nut is locked to form an inseparable component;

Or the plastic locking device is a plastic locking gasket which is arranged between a standard screw nut and a non-standard screw nut on the same screw rod, and the nut for locking the standard screw and the nut for locking the non-standard screw are combined into a component.

7. A locknut assembly as claimed in claim 6 wherein the plastic locking means is a plastic locking washer having a circular hole with a protrusion on its inner periphery, which is mounted between the front nut and the back nut on the same screw, the protrusion of the inner periphery of the circular hole of the plastic locking washer cooperating with a groove on the screw to lock the front nut and the back nut as a unit.

8. a locknut component is characterized in that a plastic locking device is a plastic round hole-shaped locking gasket or the plastic locking device is a plastic locking gasket with a convex part at the inner edge of a round hole,

one side of the plastic round hole-shaped locking gasket is provided with a rigid eccentric convex wedge positioner or an independent rigid eccentric opening clamp spring convex wedge positioner or an eccentric concave threaded hole or an eccentric concave annular hole which is solidified on the plastic round hole-shaped locking gasket and is matched with the rigid orthocenter convex wedge positioner or the independent rigid orthocenter opening clamp spring convex wedge positioner or the nut or the orthocenter concave threaded hole or the orthocenter concave annular hole on the nut; or one side of the locking gasket is provided with a wedge positioner with a convex rigid positive center or a wedge positioner with a convex independent rigid positive center open clamp spring, or a threaded hole with a concave positive center or a hole with a concave positive center ring, which is solidified on the plastic circular hole-shaped locking gasket, and the wedge positioner with a convex rigid eccentric center or the wedge positioner with a convex independent rigid eccentric open clamp spring, or the threaded hole with a concave eccentric center or the hole with a concave eccentric ring is matched with the wedge positioner with a convex rigid eccentric center or the wedge positioner with a convex rigid eccentric open clamp spring, or;

or both sides of the plastic round hole-shaped locking gasket are provided with a rigid eccentric convex wedge positioner or an independent rigid eccentric opening clamp spring convex wedge positioner or an eccentric concave threaded hole or an eccentric concave annular hole which are solidified on the plastic round hole-shaped locking gasket and are matched with the rigid orthocenter convex wedge positioner or the independent rigid orthocenter opening clamp spring convex wedge positioner or the orthocenter concave threaded hole or the orthocenter concave annular hole or the nut on the nut;

Or both sides of the plastic round hole-shaped locking gasket are provided with a rigid orthocenter convex wedge positioner or an independent rigid orthocenter open clamp spring convex wedge positioner or an orthocenter concave threaded hole or an orthocenter concave annular hole which is solidified on the plastic round hole-shaped locking gasket and is matched with the rigid eccentric convex positioner or the independent rigid eccentric open clamp spring convex wedge positioner or the eccentric concave threaded hole or the eccentric concave annular hole on the nut;

The two sides of the plastic circular hole-shaped locking gasket are provided with eccentric convex wedge locators and/or eccentric concave threaded holes or eccentric concave annular holes with opposite eccentricity, the wedge locators and/or the eccentric concave threaded holes or the eccentric concave annular holes are arranged between a front nut and a nut of a rear threaded hole on the same screw rod, and the front nut and the rear nut are locked to form a component.

9. A locknut assembly as claimed in claim 8,

One of the front nut and/or the rear nut is provided with a rigid wedge positioner with a positive center bulge or a nut, the plastic locking device is provided with an eccentric recessed threaded hole or an eccentric recessed annular hole, and the wedge positioner with the positive center bulge or the nut is matched with the eccentric recessed threaded hole or the positive center recessed annular hole; or one of the front nut and/or the rear nut is provided with a rigid eccentric convex wedge positioner, the plastic locking device is provided with a rigid positive concave threaded hole or a positive concave annular hole, and the eccentric convex wedge positioner is matched with the positive concave threaded hole or the positive concave annular hole;

One of the front nut and/or the rear nut is provided with a threaded hole with a positive concave or a hole with a positive concave annular, the plastic locking device is provided with a rigid eccentric convex wedge positioner, and the convex wedge positioner is matched with the concave threaded hole or the hole with the positive concave annular; or one of the front nut and/or the rear nut is provided with an eccentrically concave threaded hole or a concave annular hole, the plastic locking device is provided with a rigid positive convex wedge positioner, and the convex positioner is matched with the concave threaded hole or the positive concave annular hole;

The rear nut rotates, the orthocenter convex wedge positioner or the nut is inserted into the orthocenter concave thread trapezoidal hole or the annular hole, or the eccentric convex wedge positioner is inserted into the orthocenter concave thread trapezoidal hole or the annular hole, under the action of the wedge positioner, one side of the inner periphery of the front nut and/or the rear nut and the plastic circular hole-shaped locking gasket or the plastic locking gasket with the inner edge provided with the convex part is coaxial with the screw rod, and the opposite side deviates from the screw rod.

10. A method of assembling and disassembling a locknut assembly, characterized in that, when an assembly of locknuts as claimed in claim 1 or 2 or 4 or 6 or 7 or 8 or 9 is installed, a front nut is first installed on a screw to a fastening position for fastening purpose, then a plastic locking device is installed on the screw, then a rear nut is installed, and finally a plastic part of the plastic locking device is knocked down to lock the front nut and the rear nut, forming an assembly comprising the screw, the front nut, the plastic locking device and the rear nut; when the plastic locking device is disassembled, the parts of the plastic locking device for locking the front nut and the rear nut are firstly opened to form four free parts of two nuts, a screw and the plastic locking device, one wrench fixes the front nut, the other wrench takes down the rear nut, then the locking device is taken down, and finally the front nut is taken down.

Background art:

The self-locking locknut with nylon ring, neck closing, glue injection and metal loosening device is invented for preventing the self-locking locknut from loosening due to vibration and other reasons. The anti-loose nut assembly which has the defects of poor anti-loose effect, high technical content, complex structure, difficult manufacture, incapability of disassembly and the like is introduced.

the invention content is as follows:

the locknut assembly provided by the invention comprises a screw 1, a plastic locking device 2 and front and rear nuts, wherein the front nut 3, the plastic locking device 2 and the rear nut 4 are penetrated through by the screw 1, the shape of the nut can be any shape and any type, as long as the plastic locking device 2 can lock the front nut 3 and the rear nut 4 into a whole, and a new locknut assembly is formed along with the change of the technical characteristics of the screw 1, the front nut 3, the plastic locking device 2 and the rear nut 4.

The threaded hole 5 of one of the front and rear nuts is standard and the threaded hole 6 of the other nut is non-standard or standard. The nut of the standard screw hole 5 has a fastening function and is called a fastening nut, the nut of the non-standard screw hole 6 has an anti-loosening function and is called an anti-loosening nut, the screw hole of the nut of the non-standard screw hole 6 is larger than the gap of the standard nut hole 5, the screw hole 6 of the nut of the non-standard screw hole gradually expands towards the direction of the standard nut 5 at equal intervals to form a truncated cone shape or the screw hole of the nut of the non-standard screw hole 6, the end of the standard nut 5 is not provided with a thread, and the other end of the standard nut is.

one of the front and rear nuts has a male retainer 7 and the other nut has a female threaded hole 8 or a female annular hole 8, the male retainer 7 engaging the female threaded hole 8 or the female annular hole 8. Or one of the front nut and the rear nut is a small nut, the other nut is a hole with an eccentric concave ring shape of the large nut, and the small nut is matched with the inner diameter of the hole of the eccentric concave ring shape of the large nut.

The nut positioner is eccentrically convex or centrically convex (the centrically convex positioner can be replaced by a small nut), the convex positioner 7 is centrically convex to be matched with the nut of the eccentric concave threaded hole 8 or the concave annular hole 8, or the positioner 7 is centrically convex to be matched with the nut of the centrically concave threaded hole 8 or the concave annular hole 8 in which the eccentric open snap spring is arranged, as shown in figure 6. The male retainer 7 is an eccentrically male nut that mates with a right-centered female threaded hole 8 or a female annular hole 8. The eccentric protrusion retainer 7 is formed to have an outer circumference 9 which is tapered in a triangular, knife-edge and trapezoidal front view, or a protrusion 9 which is solidified on the nut in a triangular, knife-edge and trapezoidal front view.

The rear nut is rotated, the small nut or the locator 7 is inserted into the recessed thread trapezoidal hole 8 or the annular hole 8, one side of the inner periphery of the standard nut screw hole 5 and the non-standard nut screw hole 6 is coaxial with the screw rod 1 under the action of the locator 7, and the opposite side deviates from the screw rod 1.

The screw 1 is a conventional screw or the screw 11 with the groove 14 on the screw as shown in fig. 4 is fitted with a plastic locking washer 12 with a protruding part 15 on the inner edge. The use of the recessed 15 screw 11 allows the use of the standard 5 and non-standard 6 threaded nuts disclosed herein, as well as two standard threaded nuts.

The plastic locking device 2 is a device capable of locking a nut of a standard screw hole 5 and a nut of a non-standard screw hole 6, and has two states, one state is that the plastic locking device 2 is solidified on one nut to lock a front nut and a rear nut, one nut of the front nut and the rear nut is a small nut, and is solidified on the front end of the eccentric concave ring wall of the large nut, and the small nut is locked to form an inseparable component;

Another plastic locking device is a plastic locking washer 2 which is installed between a standard screw hole 5 nut and a non-standard screw hole 6 nut on the same screw 1, and the nut locking the standard screw hole 5 and the non-standard screw hole 6 are formed into one component.

The plastic locking washer 2 is a circular hole or a plastic locking washer 12 with a convex part 15 at the inner edge of the circular hole as shown in fig. 4, and the convex part 15 is matched with the groove 14 on the screw 11. The use of a plastic locking washer 12 with a raised portion 15 on the inside edge of the circular hole as in fig. 4 allows the use of the standard threaded hole 5 nut and the non-standard threaded hole 5 nut disclosed herein above, as well as the use of two standard nuts.

The plastic locking device is a plastic locking washer 12 with a bulge 15 at the inner edge of the circular hole shown in figure 4, and can also be a plastic circular hole-shaped locking washer.

As shown in fig. 2, one side of the plastic round hole-shaped locking gasket 2 or 12 is provided with a rigid eccentric convex wedge positioner 7 or an independent rigid eccentric open clamp spring convex wedge positioner 7 or an eccentric concave threaded hole 8 or an eccentric concave annular hole 8 which is solidified on the plastic round hole-shaped locking gasket and is matched with the rigid orthocenter convex wedge positioner 7 or the independent rigid orthocenter open clamp spring convex wedge positioner 7 or the orthocenter concave threaded hole 8 or the orthocenter concave annular hole 8 or the nut on the nut; or a wedge positioner 7 with a rigid positive center bulge or a wedge positioner 7 with a single rigid positive center open clamp spring bulge or a wedge positioner 7 with a positive center concave hole 8 or a hole 8 with a positive center concave ring shape, which is solidified on one side of the plastic circular hole-shaped locking gasket, is matched with the wedge positioner 7 with a rigid eccentric bulge or the wedge positioner 7 with a single rigid eccentric open clamp spring bulge or the wedge positioner 8 with an eccentric concave hole 8 or the hole 8 with an eccentric concave ring shape on the nut.

the two sides of the plastic round hole-shaped locking gasket 2 or 12 are provided with a rigid eccentric convex wedge positioner 7 or a single rigid eccentric open clamp spring convex wedge positioner 7 or an eccentric concave threaded hole 8 or an eccentric concave annular hole 8 which are solidified on the plastic round hole-shaped locking gasket and matched with the rigid orthocenter convex wedge positioner 7 or the single rigid orthocenter open clamp spring convex wedge positioner 7 or the orthocenter concave threaded hole 8 or the orthocenter concave annular hole 8 or the nut on the nut as shown in figure 3.

Or the plastic round hole-shaped locking gasket 2 or 12 is provided with a rigid orthocenter convex wedge positioner 7 or an independent rigid orthocenter open clamp spring convex wedge positioner 7 or an orthocenter concave threaded hole 8 or an orthocenter concave annular hole 8 solidified on the plastic round hole-shaped locking gasket as shown in figure 3 at two sides, and the rigid orthocenter convex wedge positioner 7 or the independent rigid eccentric open clamp spring convex wedge positioner 7 or the eccentric concave threaded hole 8 or the orthocenter concave annular hole 8 on the nut is matched with the rigid eccentric convex wedge positioner 7 or the independent rigid eccentric open clamp spring convex wedge positioner 7 or the eccentric concave annular hole 8 on the nut;

The eccentric convex wedge positioner 7 or the concave threaded hole 8 or the concave annular hole 8 on two sides of the plastic circular hole-shaped locking gasket are opposite in eccentricity, are arranged between the front nut 3 and the nut 4 of the rear threaded hole on the same screw rod 1, and lock the front nut 3 and the rear nut 4 to form a component.

one of the front nut 3 and/or the rear nut 4 is provided with a rigid wedge positioner 7 with a positive center protrusion, the plastic locking device 2 is provided with an eccentric concave threaded hole 8 or an eccentric concave annular hole 8, and the positive center protrusion wedge positioner 7 is matched with the eccentric concave threaded hole 8 or the positive center concave annular hole 8; or one of the front nut 3 and/or the rear nut 4 has a rigid eccentrically protruding wedge retainer 7, the plastic locking device 2 has a rigid right-centered recessed threaded hole 8 or a right-centered recessed annular hole, and the eccentrically protruding wedge retainer 7 is engaged with the right-centered recessed threaded hole 8 or the right-centered recessed annular hole 8.

one of the front nut 3 and the rear nut 4 is provided with a threaded hole 8 with a positive center concave or a hole 8 with a concave ring shape, the plastic locking device 2 is provided with a wedge positioner 7 with a rigid eccentric convex, and the convex wedge positioner 7 is matched with the threaded hole 8 with a concave center or the hole 8 with a positive center concave ring shape; or one of the front nut 3 and the rear nut 4 has an eccentrically recessed threaded hole 8 or a recessed annular hole 8, and the plastic locking device 2 has a rigid right-center protruding wedge retainer 7, and the protruding wedge retainer 7 is matched with the recessed threaded hole 8 or the right-center recessed annular hole 8.

The rear nut is rotated, the convex wedge retainer 7 or the nut is inserted into the concave thread trapezoidal hole 8 or the annular hole 8, under the action of the retainer 7, one side of the inner periphery of the front nut 3 and/or the rear nut 4 and the plastic circular hole-shaped locking gasket 2 or the plastic locking gasket 12 with the inner edge provided with the convex part 15 is coaxial with the screw rod 1 or 11, and the other side is deviated from the screw rod 1 or 11.

when the locknut component is installed, a front nut 3 is firstly installed on a screw rod 1 or 11 to reach a fastening position to achieve the fastening purpose, then a plastic locking device 2 or 12 is installed on the screw rod 1 or 11, then a back nut 4 is installed, and finally a plastic part of the plastic locking device 2 is knocked down to lock the front nut 3 and the back nut 4 to form a component comprising the screw rod 1 or 11, the front nut 3, a plastic locking gasket 2 or 12 and the back nut 4; when disassembling, the parts of the plastic locking device 2 or 12 locking the front nut 3 and the back nut 4 are firstly opened to form four free parts of the front nut 3, the back nut 4, a screw 1 or 11 and a gasket 2 or 12, one wrench fixes the front nut 3, the other wrench removes the back nut 4, then the locking device 2 or 12 is removed, and finally the front nut 3 is removed.

The specific principle of the self-locking locknut component is shown in figure 5, the distance A between the rotation center of the front nut 3 and the rotation center of the screw rod, the distance B between the rotation center of the rear nut 4 and the rotation center of the screw rod, and the self-locking can be eliminated when the minimum clearance between the screw rod and the front nut and the minimum clearance between the screw rod and the rear nut are A + B, namely, the self-locking can be eliminated when the clearance between the screw rod and the front nut and the clearance between the screw rod and the rear nut are smaller than A + B, and the self-locking can be eliminated only when the clearance between the screw rod and the front.

Description of the drawings:

FIG. 1 shows solution 1 with a standard nut with a male retainer, a locking washer without a male retainer or a female annular hole, and a non-standard nut with a female annular hole.

figure 2 shows the front nut of the solution 2 being a non-standard nut with a recessed annular hole, the locking washer having an eccentric protruding retainer on one side, and the rear nut being a standard nut.

FIG. 3 shows a solution 3 front and rear nut with a non-standard nut having a recessed annular hole, and a locking washer with an eccentric protruding retainer or recessed annular hole on both sides.

Fig. 4 shows a configuration in which the screw has a recess and the locking washer has a projection.

Fig. 5 is a schematic diagram of a locknut assembly, the front non-standard nut having a self-locking distance of center of rotation of a, and the rear non-standard nut having a self-locking distance of center of rotation of a.

Sequence number and name:

a screw 1, a plastic locking device 2, a front nut 3 or 4, a back nut 4 or 3, a standard screw hole 5, a non-standard nut 6, a convex wedge positioner 7, a concave thread trapezoidal hole 8 or an annular hole 8, a triangle of the convex wedge positioner 7, an outer periphery 9 with gradually reduced blade shape and trapezoid, a screw 11 with a groove, a plastic locking device 12 with a convex part at the inner edge, a screw hole 13, a screw groove 14, an inner edge convex part 15 of a plastic locking gasket,

Detailed description of the invention

Scheme 1, as shown in fig. 1, a fixed screw 1 is selected, a front nut 3 is firstly screwed to a position where the screw 1 needs to be fixed, a plastic locking gasket 2 is then installed, a rear nut 4 is then installed, a convex retainer 7 of the front nut 3 is contacted with a concave thread trapezoidal hole 8 or a concave annular hole 8 of the rear nut 4, the front nut is locked by a wrench, the resistance of the driving force for screwing the rear nut is increased, the concave thread trapezoidal hole 8 or the concave annular hole 8 slides along the triangular, blade-shaped and trapezoidal gradually-reduced outer periphery 9 of the convex retainer 7 of the front nut 3 to advance, the resistance of the driving force for screwing is increased as the rear nut 4 is driven by the driving force for screwing to advance until the final position of the rear nut relative to the front nut is preset or until the final position of the front nut relative to the upper plastic locking gasket is preset, the convex retainer 7 is inserted into the concave thread trapezoidal hole 8 or the concave annular hole 8, take off front and back spanner, beat the plastic part of plasticity locking device and fall locking front nut and back nut at last, form an integral locking subassembly including screw 1, front nut 3, plasticity locking gasket 2 and back nut 4. When the plastic locking gasket 2 is disassembled, the parts of the front nut 3 and the rear nut 4 are firstly opened to form four free parts of the front nut 3, the rear nut 4, a screw 1 and the plastic locking gasket 2, one wrench fixes the front nut 1, the other wrench takes down the rear nut 4, the plastic locking gasket 2 is taken down, and the front nut 3 is taken down finally.

Scheme 2, as shown in fig. 2, a fixed screw 1 or 11 is selected, firstly, a front nut 3 with a concave thread trapezoidal hole 8 or a concave annular hole 8 is screwed to a position where the screw 1 or 11 needs to be fixed, then a plastic locking gasket 2 or 12 with a convex wedge positioner 7 on one side is installed, then a back nut 4 is installed, the concave thread trapezoidal hole 8 or the concave annular hole 8 of the front nut 3 is contacted with the plastic locking gasket 2 of the convex wedge positioner 7 on one side, the front nut is locked by a spanner, the resistance of the screwing driving force of the back nut screwing the back nut 4 is increased, the concave thread trapezoidal hole 8 or the concave annular hole 8 slides along the triangular, blade-shaped and trapezoidal gradually-reduced outer periphery 9 of the convex wedge positioner 7, the resistance of the screwing driving force is continuously increased along with the forward movement of the back nut 4 driven by the screwing driving force until the back nut is finally positioned on the upper front nut, or until the front and rear nuts finally reach the preset position relative to the upper plastic locking gasket, the convex wedge positioner 7 is inserted into the concave thread trapezoidal hole 8 or the concave annular hole 8, the front and rear wrenches are taken down, and finally the plastic part of the plastic locking device is knocked down to lock the nut 3 and the rear nut 4, so that an integral anti-loose assembly comprising the screw 1 or 11, the front nut 3, the plastic locking gasket 2 or 12 and the rear nut 4 is formed. When the plastic locking washer 2 or 12 is disassembled, the parts of the front nut 3 and the rear nut 4 which are locked by the plastic locking washer 2 or 12 are firstly opened to form four free parts of the front nut 3, the rear nut 4, a screw 1 or 11 and the plastic locking washer 2 or 12, one wrench fixes the front nut 1, the other wrench takes down the rear nut 4, the plastic locking washer 2 is taken down, and finally the front nut 3 is taken down.

Scheme 3, as shown in fig. 3, a fixed screw 1 or 11 is selected, firstly, a front nut 3 with a concave thread trapezoidal hole 8 or a concave annular hole 8 is screwed to a position where the screw 1 or 11 needs to be fixed, then a plastic locking gasket 2 or 12 with rigid eccentric convex wedge locators 7 solidified on the plastic circular hole-shaped locking gasket on both sides (or after a single wedge locator 7 with a rigid eccentric opening clamp spring convex is installed, a plastic locking gasket 2 or 12 is installed, then a single wedge locator 7 with a rigid eccentric opening clamp spring convex on the reverse side is installed), then a rear nut 4 is installed, the concave thread trapezoidal holes 8 or the concave annular holes 8 of the front nut 3 and the rear nut 4 are contacted with the plastic locking gaskets 2 or 12 with the convex wedge locators 7 on both sides, a spanner is used for locking the front nut, and the resistance of the driving force for screwing the rear nut 4 is increased, the concave thread trapezoidal hole 8 or the concave ring hole 8 slides along the triangular, blade-shaped and trapezoidal gradually reduced outer periphery 9 of the convex wedge positioner 7 to advance, the rear nut 4 is driven to advance by the tightening driving force, the resistance of the tightening driving force is continuously increased until the rear nut is finally preset to the upper front nut or until the front nut and the rear nut are finally preset to the upper plastic locking gasket, the convex wedge positioner 7 is inserted into the concave thread trapezoidal hole 8 or the concave ring hole 8, the front wrench and the rear wrench are removed, and finally the plastic part of the plastic locking device is knocked back to lock the nut 3 and the rear nut 4, so that an integral anti-loosening assembly comprising the screw rod 1 or 11, the front nut 3, the plastic locking gasket 2 or 12 and the rear nut 4 is formed. When the plastic locking gasket 2 or 12 is disassembled, the parts of the front nut 3 and the rear nut 4 locked by the plastic locking gasket 2 or 12 are firstly opened to form four free parts of the front nut 3, the rear nut 4, a screw 1 or 11 and the plastic locking gasket 2 or 12, one wrench fixes the front nut 1 or 11, the other wrench takes down the rear nut 4, then the plastic locking gasket 2 or 12 is taken down, and finally the front nut 3 is taken down.