Screw assembly capable of quantitatively designing loosening torsional moment
By introducing filling holes and adhesives into the screw assembly to form a rotary stop part, combining elastic gaskets and anti-rotating pin holes, the problem of loosening of small gap threads in the prior art is solved, and absolute anti-loosening and mechanical screws are achieved. Performance improvement, suitable for a variety of applications.
Patent Information
- Application Number
- CN202311808468.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-25
- Publication Date
- 2024-12-13
AI Technical Summary
Existing anti-loosening screw assembly cannot absolutely prevent thread loosening, especially small gap thread loosening defects.
A screw assembly that can quantitatively design loosens and relieves torque is designed. By setting a filling hole in the screw nut, adhesive is poured into the fixed groove to form a rotary stop component, and the relative position of the screw and the fixing surface are accurately fixed. , ensure absolute anti-loosening and withdrawal function, and introduce elastic gaskets and anti-rotating pin holes into the screw structure to enhance friction and fixity.
The absolute anti-loosening and retreating function of the screw is realized, which avoids the small gap and fine rotary distance loosening, improves mechanical properties, is suitable for vibration and impact resistance, and prevents high heat problems caused by loosening in electrical equipment.
Smart Images
Figure CN119122908A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of anti-loosening screw components, and in particular relates to a screw component capable of quantitatively designing a loosening and back-torque torque. Background Art
[0002] The types of anti-loosening screw assemblies in the prior art generally include spring washer flat washer screw assemblies, helical tooth spring washer screw assemblies, screw assemblies with safety ropes, and the like.
[0003] The spring washer and flat washer screw assembly connects the fixed surface and the seat together through screws, spring washers and flat washers. The fixed surface is provided with screw holes, and the seat is provided with threaded holes matching the screw threads, and the screws can be screwed into place freely and fully. The thread is prevented from falling off by two kinds of friction, one is the friction between the thread teeth and the thread grooves, and the other is the friction generated by the flattened spring washer relying on its own material elasticity to press against the inner plane of the screw head and the flat washer plane at the same time. It is one of the commonly used thread structures at present, and it cannot absolutely prevent the thread from loosening, that is, there is a random small proportion of thread loosening defects.
[0004] The helical spring washer screw assembly connects the fixed surface and the seat together through screws, spring washers and flat washers. The fixed surface is provided with screw holes, and the seat is provided with threaded holes matching the screw threads, and it is ensured that the screw can be fully and freely screwed into place. The screw and spring washer are provided with matching helical tooth platforms and tooth grooves. When the screw is screwed into place clockwise, the spring washer and the flat washer can be pressed to tighten the fixed surface and the seat. The helical tooth matching structure only allows tightening in one direction. The tooth platform falls into the tooth groove to complete the helical tooth meshing. The helical tooth platform allows the screw to be screwed in one direction through the slipping of the helical tooth inclined surface. On the contrary, when the screw rotates counterclockwise, that is, when the screw is loosened, the tooth platform falls into the tooth groove to complete the helical tooth meshing, and the straight surface of the tooth groove will block the straight surface of the tooth platform to prevent the relative movement of the tooth groove and the tooth platform, thereby preventing the screw from loosening. When the tooth platform and tooth groove of the helical teeth are in full match, the thread can be absolutely prevented from falling off. However, when the thread is tightened, its terminal position is random, that is, it is generally in a semi-combined state between the tooth groove and the tooth platform of the helical teeth, that is, there is a certain matching gap between the straight surface parts of the helical teeth. In other words, although many helical teeth are processed around the screw mechanism, there is always a gap between the helical teeth. When the tooth groove and the tooth platform of the helical teeth are semi-combined, due to the existence of the gap in the straight surface part, the friction between the thread teeth and the thread groove cannot prevent the thread from loosening, and the screw may loosen with a small gap. At the same time, the screw can only be removed destructively and cannot be installed repeatedly.
[0005] The screw assembly with a safety rope has a through hole for the safety rope on each screw head. After each screw is fully tightened, a safety rope is passed through each screw head through hole. After all the screws are strung together, the safety rope heads are knotted and tightened to prevent all the screws from loosening due to reverse rotation. The series connection of the safety rope can prevent the screws from loosening due to a large rotation distance. However, when all the tightened screws are strung together with the safety rope, there is a certain gap between the safety rope and the screw hole (otherwise the safety rope cannot be inserted). Moreover, the safety rope connected in series to the screw cannot completely prevent the slight rotation distance of each screw head. Therefore, the setting of the safety rope cannot prevent the screws from loosening due to a small gap.
[0006] In summary, the anti-loosening screw assemblies in the prior art all have the defect of small gap thread loosening. Summary of the invention
[0007] The present invention aims to provide a screw assembly capable of quantitatively designing the loosening and untwisting torque, thereby solving the problem that the anti-loosening screw assemblies in the prior art all have the defect of small gap thread loosening.
[0008] In order to achieve the above-mentioned object of the invention, the technical solution adopted by the present invention is as follows:
[0009] A screw assembly capable of quantitatively designing the loosening and untwisting torque is provided, which comprises an anti-loosening screw, which is a hexagonal screw or a countersunk screw; a perfusion hole is vertically arranged on the nut of the anti-loosening screw;
[0010] When the anti-loosening screw is a hexagonal screw, an anti-loosening flat washer is sleeved on the anti-loosening screw, and the anti-loosening flat washer is used to be fixedly connected to the fixing surface. The upper end surface of the anti-loosening flat washer is provided with a first pouring groove, and the adhesive is poured into the first pouring groove through the pouring hole;
[0011] When the anti-loosening screw is a countersunk screw, a screw countersunk hole is provided on the fixing surface, and a second pouring groove is provided on the side of the screw countersunk hole; the adhesive is poured into the second pouring groove through the pouring hole.
[0012] The basic principle of the present invention is: after the screw assembly with quantitatively designed loosening torque in the present invention is tightened and fixed on the fixing surface according to a certain torque, adhesive is poured into the first pouring groove or the second pouring groove through the pouring hole. After the adhesive is cured, a rotation-stopping part is formed for precise matching with the anti-loosening screw, and the relative position of the anti-loosening screw and the fixing surface is accurately fixed, thereby realizing the absolute anti-loosening function of the anti-loosening screw, and solving the problem of small gap thread loosening defects in the anti-loosening screw assemblies in the prior art.
[0013] At the same time, the anti-shear cross-sectional area of the anti-rotation part is always the same as the cross-sectional area of the injection hole, so as to realize the quantitative design of the anti-loosening torque and achieve the mechanical performance requirements such as anti-vibration and anti-impact of the product system using the screw assembly.
[0014] Furthermore, a plurality of perfusion holes are vertically arranged on the nut of the anti-loosening screw, and the plurality of perfusion holes are evenly arranged in a circumferential direction with the axis of the anti-loosening screw as the center; when the anti-loosening screw is tightened, at least one perfusion hole is aligned with the first perfusion groove or the second perfusion groove.
[0015] Furthermore, an elastic washer is arranged between the anti-loosening flat washer and the nut of the anti-loosening screw. When the anti-loosening screw is tightened, the flattened elastic washer relies on its own material elasticity to press against the inner plane of the anti-loosening screw nut and the anti-loosening flat washer plane to generate friction, thereby preventing the anti-loosening screw from loosening.
[0016] Furthermore, anti-rotation pin holes are provided on the lower end surface and the fixed surface of the anti-loosening flat washer, and an anti-rotation pin is provided between the two anti-rotation pin holes; the anti-loosening flat washer is fixed on the fixed surface by cooperating with the anti-rotation pin and the anti-rotation pin hole, thereby preventing the anti-loosening flat washer from rotating during the process of tightening the anti-loosening screw.
[0017] Furthermore, when the anti-loosening screw is a hexagonal screw, six perfusion holes are vertically arranged on the nut of the hexagonal screw, and the six perfusion holes are evenly arranged in a circumferential direction with the axis of the hexagonal screw as the center; as a specific setting method of the first perfusion groove on the upper end surface of the anti-loosening flat pad, the number of the first perfusion grooves is 2, and the two first perfusion grooves are both arc-shaped structures, the circumferential angles corresponding to the two first perfusion grooves are 40°, and the spacing between the two first perfusion grooves is 90°; the six perfusion holes and the two first perfusion grooves are located at the same circumferential position; the structural design of the six evenly distributed perfusion holes and the two first perfusion grooves accommodates the anti-loosening screw to terminate randomly at any position, that is, there is always at least one perfusion hole completely located in the first perfusion groove area, thereby ensuring that the perfusion section is always the same, and the adhesive can be poured into the first perfusion groove through the perfusion hole to absolutely lock this position.
[0018] Furthermore, when the anti-loosening screw is a countersunk screw, six perfusion holes are vertically arranged on the nut of the countersunk screw, and the six perfusion holes are evenly arranged in a circumferential direction with the axis of the hexagonal screw as the center; the number of second perfusion grooves is 2, and the 2 second perfusion grooves are both arc-shaped structures, the circumferential angles corresponding to the 2 second perfusion grooves are 40°, and the spacing between the 2 second perfusion grooves is 90°; the six perfusion holes and the 2 second perfusion grooves are located at the same circumferential position; the structural design of the six evenly distributed perfusion holes and the two second perfusion grooves accommodates the anti-loosening screw to terminate randomly at any position, that is, there is always at least one perfusion hole completely located in the second perfusion groove area, thereby ensuring that the perfusion section is always the same, and the adhesive can be poured into the second perfusion groove through the perfusion hole to absolutely lock this position.
[0019] Furthermore, the adhesive is a semi-fluid colloid or a pourable metal filler. When the semi-fluid colloid or the pourable metal filler is heated to a certain temperature, it becomes a semi-fluid paste, which can be poured into a cavity of any shape, and solidifies at room temperature after pouring to become a solid. When disassembling the screw assembly, the adhesive can be blown and melted at high temperature, and the shear resistance of the poured adhesive is significantly reduced, thereby facilitating repeated assembly and disassembly.
[0020] The beneficial effects of the present invention are as follows: 1. The screw assembly of the present invention can quantitatively design the loosening torque, and the adhesive is poured into the pouring groove through the pouring hole. After the adhesive is cured, a rotation-stopping part is formed, and the rotation-stopping part accurately fixes the relative position of the anti-loosening screw and the fixing surface, thereby realizing the absolute anti-loosening function of the anti-loosening screw. The screw assembly has a simple structure, convenient operation, reliable anti-retraction effect, and prevents the small gap and fine rotation from loosening. Compared with the existing thread glue fixing method, there is no defect probability that too little glue is applied to achieve the anti-retraction effect, too much glue is applied to remove the screw and lock it multiple times, and too much glue is applied to affect the grounding and power transmission function of the screw itself. In the circuit connection where two grounding plates are pressed by screws, the use of metal fillers can effectively prevent the defect of high heat generation caused by the increase of lap resistance due to the loosening of the screws, and can prevent the insulating colloid from affecting the lap resistance, ensure the working efficiency of electrical equipment, and eradicate such small-proportion bad soft faults.
[0021] 2. The screw assembly of the present invention can quantitatively design the loosening torque. The anti-rotation part is formed by solidifying after the adhesive is poured into the pouring groove through a pouring hole. The shear resistance cross-sectional area of the anti-rotation part is always the same as the cross-sectional area of the pouring hole, thereby realizing the quantitative design of the anti-loosening torque and achieving the mechanical performance requirements such as anti-vibration and anti-impact of the product system using the screw assembly.
[0022] 3. The screw assembly of the present invention can quantitatively design the loosening torque, and the structural design of six evenly distributed injection holes and two injection grooves can accommodate the random termination of the anti-loosening screw at any position. The position can be absolutely locked by injecting adhesive into the injection groove through a injection hole completely located in the injection groove area; when disassembling the screw assembly, the adhesive can be blown and melted at high temperature, and the shear resistance of the injected adhesive is significantly reduced, thereby facilitating repeated assembly and disassembly. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 A schematic diagram of the three-dimensional structure of the screw assembly when the anti-loosening screw is a hexagonal screw.
[0024] Figure 2 It is a structural schematic diagram of the lower end surface of the anti-loosening flat pad.
[0025] Figure 3 A schematic diagram of the three-dimensional structure of the screw assembly when the anti-loosening screw is a countersunk screw.
[0026] Figure 4 Schematic diagram of the structure where six injection holes are aligned with two first injection slots Figure 1 .
[0027] Figure 5 Schematic diagram of the structure where six injection holes are aligned with two first injection slots Figure 2 .
[0028] Figure 6 This is a schematic diagram of the structure of the anti-rotation parts.
[0029] Figure 7 It is a schematic diagram of the structure in which six injection holes are aligned with two second injection grooves.
[0030] Among them, 1. anti-loosening screw; 2. pouring hole; 201. first pouring hole; 202. second pouring hole; 203. third pouring hole; 204. fourth pouring hole; 205. fifth pouring hole; 206. sixth pouring hole; 3. anti-loosening flat washer; 4. first pouring groove; 5. second pouring groove; 6. elastic gasket; 7. anti-rotation pin hole; 8. anti-rotation pin; 9. fixing surface; 10. anti-rotation part. DETAILED DESCRIPTION
[0031] The specific implementation modes of the present invention are described below so that those skilled in the art can understand the present invention. However, it should be clear that the present invention is not limited to the scope of the specific implementation modes. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the attached claims, these changes are obvious, and all inventions and creations utilizing the concept of the present invention are protected.
[0032] like Figure 1 As shown, the present invention provides a screw assembly capable of quantitatively designing a loosening and back-torque torque, which includes a locking screw 1, which is a hexagonal screw, and a nut of the locking screw 1 is vertically provided with six pouring holes 2, which are evenly arranged in a circumferential direction with the axis of the locking screw 1 as the center. A locking flat washer 3 is sleeved on the locking screw 1, and the locking flat washer 3 is used to be fixedly connected to a fixing surface 9, and a first pouring groove 4 is provided on the upper end surface of the locking flat washer 3, and pouring is performed into the first pouring groove 4 through the pouring holes 2.
[0033] There are two first perfusion grooves 4, both of which are arc-shaped structures. The corresponding circumferential angles of the two first perfusion grooves 4 are 40°, and the spacing between the two first perfusion grooves 4 is 90°; the six perfusion holes 2 and the two first perfusion grooves 4 are located at the same circumferential position.
[0034] Adhesive is poured into the first pouring groove 4 through the pouring hole 2. After the adhesive is cured, a rotation-stopping part 10 is formed for precisely matching the anti-loosening screw 1, and the relative position of the anti-loosening screw 1 and the fixing surface 9 is accurately fixed, thereby realizing the absolute anti-loosening function of the anti-loosening screw, and solving the problem of small gap thread loosening defects in the anti-loosening screw 1 components in the prior art.
[0035] The structural design of six evenly distributed injection holes 2 and two first injection grooves 4 accommodates the random termination of the anti-loosening screw 1 at any position, and the position can be absolutely locked by injecting adhesive into the first injection groove 4 through a injection hole 2 completely located in the area of the first injection groove 4.
[0036] like Figure 1 , Figure 4 and Figure 5 As shown, the six perfusion holes 2 are evenly distributed on the ΦD circumference of the outer edge of the anti-loosening screw 1. When the anti-loosening screw 1 is tightened, the six perfusion holes 2 rotate with it. The rotating perfusion holes 2 gradually enter the area of the first perfusion groove 4 from one end of the perfusion groove. The deflection angle of the perfusion hole 2 from the center of the hole just entering the area of the first perfusion groove 4 to the full entry into the area of the first perfusion groove 4 is 2°27′, that is, 2.45°. Figure 5As shown, the left side of the cross line of the ΦD circle center is set to 0°, the two first perfusion grooves 4 do not rotate, and only the six perfusion holes 2 rotate clockwise. The six perfusion holes 2 are respectively the first perfusion hole 201, the second perfusion hole 202, the third perfusion hole 203, the fourth perfusion hole 204, the fifth perfusion hole 205 and the sixth perfusion hole 206. When the first perfusion hole 201 is located at 90+40-2.45=127.55° and is about to partially leave the terminal end position of the first perfusion groove 4, the third perfusion hole 203, which is 2*60°=120° away from the first perfusion hole 201, has actually reached a position of 7.55° from the starting end of the first perfusion groove 4 on the left, which is greater than the deflection angle of 2.45° for all the perfusion holes 2 to enter the perfusion groove area, that is, at this time, the third perfusion hole 203 completely enters the first perfusion groove 4 area on the left. When the third perfusion hole 203 is located at 40-2.45=37.55° and is about to partially leave the terminal end position of the first perfusion groove 4 on the left, the second perfusion hole 202, which is 60° away from the third perfusion hole 203, has actually reached the 97.55°-90°=7.55° position of the first perfusion groove 4 on the right, that is, 7.55° away from the starting end of the first perfusion groove 4 on the right, which is greater than the deflection angle of 2.45° at which the perfusion hole 202 completely enters the area of the first perfusion groove 4 on the right, that is, at this time, the second perfusion hole 202 completely enters the area of the first perfusion groove 4 on the right. By analogy, when the second perfusion hole 202 gradually leaves the first perfusion groove 4 on the right, the fourth perfusion hole 204 has completely entered the area of the first perfusion groove 4 on the left; when the fourth perfusion hole 204 gradually leaves the first perfusion groove 4 on the left, the third perfusion hole 203 has completely entered the area of the first perfusion groove 4 on the right, until an infinite cycle. When the anti-loosening screw 1 ends at any position after being tightened, there is at least one complete perfusion hole 2 placed in the area of the first perfusion groove 4. This structure can ensure that at any terminating position of the anti-loosening screw 1, an adhesive can be poured from a perfusion hole 2 completely located in the area of the first perfusion groove 4 to form a rotation-stopping part 10, thereby ensuring that the shear-resistant cross-sectional area of the rotation-stopping part 10 after curing is equal to the cross-sectional area of one perfusion hole 2.
[0037] After the anti-loosening screw 1 is tightened, the adhesive is poured from a pouring hole 2 completely located in the first pouring groove 4 area, and the first pouring groove 4 and the pouring hole 2 are filled with adhesive. Figure 6 As shown, after the adhesive is cured, a stop part 10 is formed that absolutely matches the position of the anti-loosening screw 1 after tightening. The stop part 10 can completely prevent the anti-loosening screw 1 from rotating and can absolutely lock this position. The disassembly torque of the anti-loosening screw 1 is accurately designed by the cross-sectional area size of the injection hole 2 and the selection of the adhesive material. After the anti-loosening screw 1 is tightened, the stop part 10 itself will not fall off. The stop part 10 can be visually injected to ensure good operability and ensure that the adhesive fills the injection hole 2 and the first injection groove 4. At the same time, after the anti-loosening screw 1 is installed, a panel can be set to encapsulate the top of the injection hole 2 to improve the appearance of the finished product.
[0038] In this embodiment, preferably but not limited to, an elastic gasket 6 is provided between the anti-loosening flat washer 3 and the nut of the anti-loosening screw 1. When the anti-loosening screw 1 is tightened, the flattened elastic gasket 6 relies on its own material elasticity to press against the inner side plane of the nut of the anti-loosening screw 1 and the plane of the anti-loosening flat washer 3 to generate friction, thereby preventing the anti-loosening screw 1 from loosening.
[0039] like Figure 2 As shown, anti-rotation pin holes 7 are provided on the lower end surface of the anti-loosening flat washer 3 and the fixed surface 9, and an anti-rotation pin 8 is provided between the two anti-rotation pin holes 7; the anti-loosening flat washer 3 is fixed on the fixed surface 9 by cooperating with the anti-rotation pin 8 and the anti-rotation pin hole 7, so as to prevent the anti-loosening flat washer 3 from rotating together during the process of tightening the anti-loosening screw 1.
[0040] The adhesive is a semi-fluid colloid or a pourable metal filler. When the semi-fluid colloid or the pourable metal filler is heated to a certain temperature, it becomes a semi-fluid paste and can be poured into any shape of cavity. After pouring, it solidifies at room temperature and becomes solid. When removing the anti-loosening screw 1, a large torque is used to offset the friction force of the spring pad, the friction force of the thread and the shearing force of the anti-rotation part 10, and the anti-rotation part 10 is cut off. Since the anti-rotation part 10 can be made of a material that has no adhesion to the metal and can be directly taken out, or a material that can be removed by high-temperature blowing and melting, the anti-loosening screw 1 is disassembled, the anti-rotation part 10 is removed, and it is left for the next tightening and fixing, so that it is convenient for repeated assembly and disassembly.
[0041] Compared with the existing method of fixing threaded glue, there is no defect probability of not achieving the anti-retraction effect due to too little glue, not being able to remove the screws and locking them multiple times due to too much glue, and not being able to affect the grounding and power transmission function of the screws themselves due to too much glue. In occasions where screws are used to tighten the circuit connection between two grounding plates, it can effectively prevent the defect of high heat caused by increased lap resistance due to loose screws, ensure the working efficiency of electrical equipment, and eradicate such small-proportion soft faults.
[0042] The present invention provides a screw assembly capable of quantitatively designing the loosening and untwisting torque, and can also be used in situations where countersunk screws are used. Specifically, Figure 3 and Figure 7 As shown, the anti-loosening screw 1 is a countersunk screw, a screw countersunk hole is provided on the fixing surface 9, and a second pouring groove 5 is provided on the side of the screw countersunk hole; the adhesive is poured into the second pouring groove 5 through the pouring hole 2. After tightening the anti-loosening screw 1, the adhesive is poured from a pouring hole 2 completely located in the area of the second pouring groove 5, and the adhesive is solidified to form a rotation-stopping part 10, which accurately fixes the relative position of the anti-loosening screw 1 and the fixing surface 9, thereby realizing the absolute anti-loosening function of the anti-loosening screw 1.
[0043] There are two second perfusion grooves 5 , both of which are arc-shaped structures. The corresponding circumferential angles of the two second perfusion grooves 5 are 40°, and the spacing between the two second perfusion grooves 5 is 90°. The six perfusion holes 2 and the two second perfusion grooves 5 are located at the same circumferential position.
[0044] The principle of aligning the injection hole 2 and the second injection groove 5 is the same as the principle of aligning the injection hole 2 and the first injection groove 4 .
[0045] In summary, after the screw assembly with quantitatively designed loosening torque in the present invention is tightened and fixed on the fixed surface 9 according to a certain torque, the adhesive is poured into the first pouring groove 4 or the second pouring groove 5 through the pouring hole 2. After the adhesive is cured, a stopper part 10 is formed for precise matching with the anti-loosening screw 1, and the relative position of the anti-loosening screw 1 and the fixed surface 9 is accurately fixed, thereby achieving the absolute anti-loosening function of the screw, solving the problem of the small gap thread loosening defect in the anti-loosening screw 1 assembly in the prior art. At the same time, the anti-shear cross-sectional area of the stopper part 10 is always the same as the cross-sectional area of the pouring hole 2, realizing the quantitative design of the anti-loosening torque, and achieving the mechanical performance requirements such as vibration resistance and impact resistance of the product system using the screw assembly.
Claims
1. A screw assembly capable of quantitatively designing the loosening torque, characterized in that: It includes an anti-loosening screw, which is a hexagonal screw or a countersunk screw; a perfusion hole is vertically arranged on the nut of the anti-loosening screw; When the anti-loosening screw is a hexagonal screw, an anti-loosening flat washer is sleeved on the anti-loosening screw, the anti-loosening flat washer is used to be fixedly connected to the fixing surface, and the upper end surface of the anti-loosening flat washer is provided with a first pouring groove, and the adhesive is poured into the first pouring groove through the pouring hole; When the anti-loosening screw is a countersunk screw, a screw countersunk hole is provided on the fixing surface, and a second pouring groove is provided on the side of the screw countersunk hole; the adhesive is poured into the second pouring groove through the pouring hole.
2. The screw assembly capable of quantitatively designing the loosening torque according to claim 1, characterized in that: A plurality of the perfusion holes are vertically arranged on the nut of the anti-loosening screw, and the plurality of perfusion holes are evenly arranged in a circumferential direction with the axis of the anti-loosening screw as the center; when the anti-loosening screw is tightened, at least one perfusion hole is aligned with the first perfusion groove or the second perfusion groove.
3. The screw assembly capable of quantitatively designing the loosening torque according to claim 2, characterized in that: An elastic gasket is arranged between the anti-loosening flat washer and the nut of the anti-loosening screw.
4. The screw assembly capable of quantitatively designing the loosening torque according to claim 3, characterized in that: The lower end surface and the fixed surface of the anti-loosening flat pad are both provided with anti-rotation pin holes, and an anti-rotation pin is provided between the two anti-rotation pin holes.
5. The screw assembly capable of quantitatively designing the loosening torque according to claim 2, characterized in that: When the anti-loosening screw is a hexagonal screw, six injection holes are vertically arranged on the nut of the hexagonal screw, and the six injection holes are evenly arranged in a circumferential direction with the axis of the hexagonal screw as the center; There are two first perfusion grooves, both of which are arc-shaped structures. The corresponding circumferential angles of the two first perfusion grooves are 40°, and the spacing between the two first perfusion grooves is 90°; the six perfusion holes and the two first perfusion grooves are located at the same circumferential position.
6. The screw assembly capable of quantitatively designing the loosening torque according to claim 2, characterized in that: When the anti-loosening screw is a countersunk screw, six injection holes are vertically arranged on the nut of the countersunk screw, and the six injection holes are evenly arranged in a circumferential direction with the axis of the hexagonal screw as the center; There are two second perfusion grooves, both of which are arc-shaped structures. The corresponding circumferential angles of the two second perfusion grooves are 40°, and the spacing between the two second perfusion grooves is 90°. The six perfusion holes and the two second perfusion grooves are located at the same circumferential position.
7. The screw assembly capable of quantitatively designing the loosening torque according to claim 1, characterized in that: The adhesive is a semi-fluid colloid or a metal filler.