Automobile screw resistant to high temperature and high pressure

Abstract

The utility model relates to the technical field of fasteners, in particular to a high-temperature-resistant and high-pressure-resistant automobile screw, which is characterized in that a first nut is arranged on the side wall of a screw rod, a connecting cylinder is fixedly mounted at the bottom of the first nut, a second nut is fixedly mounted at the bottom of the connecting cylinder, and metal sheets are fixedly mounted in the first nut and the second nut; the metal sheets and the trapezoidal threads are installed in a threaded mode, the first nut and the second nut are opposite in threaded installation direction, the first nut and the second nut cannot be loosened at the same time, the metal sheets are installed in the first nut and the second nut and can absorb part of force, and a certain buffering effect is achieved. The contact area is increased under the cooperation of the circular truncated cone and the gasket, the pressure borne by the unit area is reduced, and therefore the local pressure intensity is reduced, damage to the surface of a connecting piece is reduced, the overall anti-pressure capacity is enhanced, the bearing capacity and the self-locking performance can be improved through the design of the trapezoidal threads, and the service life is prolonged. Therefore, the situation of looseness caused by inaccurate precision can be effectively prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of fasteners, in particular to a high-temperature and high-pressure resistant automobile screw. Background Art

[0002] Screws are a commonly used mechanical fastener, primarily used to fasten two or more objects together. They typically consist of a cylindrical metal rod with a spiral thread running along its length. The thread design allows the screw to engage with a corresponding nut or hole as it rotates, creating a fastening effect. In practical applications, high-temperature and high-pressure automotive screws typically require the following technologies:

[0003] 1. Head: This is the part of the screw used to apply torque. Common shapes include hexagonal head, flat head, round head, countersunk head, etc.

[0004] 2. Screw (or rod): It is the main part of the screw with threads;

[0005] 3. Thread: distributed along the screw, used to cooperate with nuts or other internal threaded parts to achieve a fastening connection.

[0006] For example, a Chinese patent discloses: a screw, patent number: CN217814409U, by setting a top plate, a sealing block with a boss-shaped structure is set in the middle of the lower surface of the top plate, the sealing block can seal the hole drilled by the screw, thereby preventing dust from entering the hole, and by setting an inclined protrusion, the inclined direction of the inclined protrusion is consistent with the drilling direction of the screw, so that the screw is subjected to greater friction when rotating in the reverse direction, thereby preventing the screw from loosening, and by setting a nut and a torsion groove, the device can adapt to external hexagonal wrenches and internal hexagonal wrenches, and by setting a slotted slot, the device can adapt to a slotted screwdriver, further improving the practicality of the device.

[0007] However, during the implementation of the above technical solution, it was found that at least the following technical problems exist: as mentioned above, when in a high-pressure environment, the high pressure may cause the screws to be subjected to huge pressure, resulting in elastic or plastic deformation, which will affect the tightening effect and dimensional accuracy of the screws. Utility Model Content

[0008] (1) Technical problems solved

[0009] In response to the shortcomings of the existing technology, the utility model provides a high-temperature and high-pressure resistant automotive screw to solve the technical problem mentioned above that when in a high-pressure environment, the high pressure may cause the screw to be subjected to huge pressure, resulting in elastic or plastic deformation, which will affect the tightening effect and dimensional accuracy of the screw.

[0010] (2) Technical solution

[0011] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0012] A high-temperature and high-pressure resistant automotive screw includes a screw, a high-pressure resistant mechanism provided on the side wall of the screw, the high-pressure resistant mechanism including a trapezoidal thread, a first nut, a metal sheet, a connecting tube and a second nut, the trapezoidal thread fixedly mounted on the side wall of the screw, the first nut provided on the side wall of the screw, the connecting tube fixedly mounted on the bottom of the first nut, the second nut fixedly mounted on the bottom of the connecting tube, the metal sheet fixedly mounted inside the first nut and the second nut, and the metal sheet threadably mounted on the trapezoidal thread.

[0013] Preferably, the screw and the trapezoidal thread side walls are provided with a nickel-based alloy coating, and a round table is fixedly mounted on the top of the screw.

[0014] Preferably, a gasket is fixedly mounted on the side wall of the screw, and the gasket is fixedly mounted on the round table.

[0015] Preferably, a screw head is fixedly mounted on the top of the truncated table, and a hexagonal groove is provided inside the screw head.

[0016] Preferably, a gear groove is provided inside the screw, and an annular groove is provided on the side wall of the screw.

[0017] Preferably: a conical block is fixedly installed at the bottom of the screw, perfluoroether rubber is fixedly installed inside the screw, an antimony block is fixedly installed on the end of the perfluoroether rubber away from the screw, and a mounting column is fixedly installed on the end of the antimony block away from the perfluoroether rubber, and the mounting column is fixedly installed inside the screw.

[0018] (3) Beneficial effects

[0019] 1. When under high pressure, if the screw is squeezed and the first nut becomes loose, the first nut and the second nut are installed in opposite directions, and the first nut and the second nut will not loosen at the same time. Metal sheets are installed inside the first nut and the second nut, and the metal sheets will also absorb part of the force and play a certain buffering role. The cooperation of the cone and the gasket increases the contact area, and the pressure per unit area is reduced, thereby reducing the local pressure, reducing the damage to the surface of the connector, and enhancing the overall compressive resistance. The design of the trapezoidal thread can improve the load-bearing capacity and self-locking performance, thereby effectively preventing loosening caused by inaccurate precision.

[0020] 2. When the high temperature causes the screw to expand, a gear groove is opened inside the screw. If there is an object blocking the outside of the screw, it will expand toward the gear groove. The gear groove will provide sufficient space. The surface is coated with a nickel-based alloy coating, which can also increase the high temperature resistance of the screw. When the screw expands outward, the annular groove also provides space for the screw to expand, preventing the screw from breaking due to expansion. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and to implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings.

[0022] Figure 1 It is a three-dimensional structural diagram of the utility model;

[0023] Figure 2 This is a structural diagram of the nickel-based alloy coating of the present utility model;

[0024] Figure 3 This is a diagram of the frustum structure of the utility model;

[0025] Figure 4 This is a structural diagram of the gear groove of the present utility model.

[0026] Legend: 11. Screw; 12. Nickel-based alloy coating; 13. Cone; 14. Washer; 15. Trapezoidal thread; 16. First nut; 17. Metal sheet; 18. Connecting tube; 19. Second nut; 21. Screw head; 22. Hexagonal groove; 23. Gear groove; 24. Annular groove; 25. Conical block; 26. Perfluoroelastomer; 27. Antimony block; 28. Mounting column. DETAILED DESCRIPTION

[0027] The embodiment of the present application provides a high-temperature and high-pressure resistant automotive screw, which effectively solves the problem that when in a high-pressure environment, the high pressure may cause the screw to be subjected to huge pressure, thereby causing elastic or plastic deformation, which will affect the fastening effect and dimensional accuracy of the screw. When in a high-pressure environment, the screw rod is squeezed and if the first nut becomes loose, the first nut and the second nut are installed in opposite directions of the thread, and the first nut and the second nut will not loosen at the same time. In addition, metal sheets are installed inside the first nut and the second nut, and the metal sheets will also absorb part of the force, playing a certain buffering role. The cooperation of the round table and the gasket increases the contact area. The pressure per unit area is reduced, thereby reducing local pressure, reducing damage to the surface of the connector, and enhancing the overall pressure resistance. The trapezoidal thread design can improve the load-bearing capacity and self-locking performance, thereby effectively preventing loosening due to inaccurate precision. When the high temperature causes the screw to expand, a gear groove is opened inside the screw. If there is an object blocking the outside of the screw, it will expand in the direction of the gear groove, which will provide sufficient space. The surface is coated with a nickel-based alloy coating, which can also increase the high temperature resistance of the screw. When the screw expands outward, the annular groove also provides space for the screw to expand, preventing the screw from breaking due to expansion.

[0028] Example

[0029] like Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, the technical solution in the embodiment of the present application effectively solves the technical problem that when in a high-pressure environment, the high pressure may cause the screw to be subjected to huge pressure, thereby causing elastic or plastic deformation, which will affect the fastening effect and dimensional accuracy of the screw. The overall idea is as follows: A high-temperature and high-pressure resistant automotive screw comprises a screw 11, a high-pressure resistant mechanism is provided on the side wall of the screw 11, the high-pressure resistant mechanism comprises a trapezoidal thread 15, a first nut 16, a metal sheet 17, a connecting tube 18 and a second nut 19, the trapezoidal thread 15 is fixedly mounted on the side wall of the screw 11, the first nut 16 is provided on the side wall of the screw 11, the connecting tube 18 is fixedly mounted on the bottom of the first nut 16, the second nut 19 is fixedly mounted on the bottom of the connecting tube 18, and the metal sheet 17 is fixedly mounted on the first nut 16 and the second nut 19 9, the metal sheet 17 is threadedly installed with the trapezoidal thread 15. When under high pressure, the screw rod 11 is squeezed. If the first nut 16 becomes loose, the first nut 16 and the second nut 19 are threadedly installed in opposite directions. The first nut 16 and the second nut 19 will not loosen at the same time, and the metal sheet 17 is installed inside the first nut 16 and the second nut 19. The metal sheet 17 will also absorb part of the force and play a certain buffering role. The cooperation of the cone 13 and the gasket 14 increases the contact area, and the pressure per unit area is reduced, thereby reducing the local pressure, reducing the damage to the surface of the connector, and enhancing the overall pressure resistance. The design of the trapezoidal thread 15 can improve the load-bearing capacity and self-locking performance, thereby effectively preventing loosening caused by inaccurate precision.

[0030] The side walls of the screw 11 and the trapezoidal thread 15 are provided with a nickel-based alloy coating 12, a frustum 13 is fixedly installed on the top of the screw 11, a gasket 14 is fixedly installed on the side wall of the screw 11, the gasket 14 is fixedly installed on the frustum 13, a screw head 21 is fixedly installed on the top of the frustum 13, a hexagonal groove 22 is opened inside the screw head 21, a gear groove 23 is opened inside the screw 11, and an annular groove 24 is opened on the side wall of the screw 11. When the high temperature causes the screw 11 to expand, the gear groove 23 is opened inside the screw 11, and there is an object blocking the outside of the screw 11, it will expand in the direction of the gear groove 23, and the gear groove 23 will provide sufficient space. The surface coated with a nickel-based alloy coating 12 can also increase the high temperature resistance of the screw 11. When the screw 11 expands outward, the annular groove 24 also provides space for the screw 11 to expand, thereby preventing the screw 11 from breaking due to expansion.

[0031] A conical block 25 is fixedly mounted on the bottom of the screw rod 11 to facilitate alignment with the screw hole during installation.

[0032] A perfluoroether rubber 26 is fixedly installed inside the screw 11, and an antimony block 27 is fixedly installed on the end of the perfluoroether rubber 26 away from the screw 11. A mounting post 28 is fixedly installed on the end of the antimony block 27 away from the perfluoroether rubber 26. The mounting post 28 is fixedly installed inside the screw 11. There is a gap between the perfluoroether rubber 26 and the inside of the screw 11. The two sides of the perfluoroether rubber 26 are not in direct contact with the inside of the screw 11. When the environment around the screw 11 is hot, the screw 11 will expand inward, squeezing the perfluoroether rubber 26, causing the perfluoroether rubber 26 to deform to both sides to fill the gap. The block 27 will shrink due to heat, providing space for the screw 11 to expand. When in a colder environment, the screw 11 shrinks. At this time, the antimony block 27 (due to its unique crystal structure and the interaction between atoms of antimony metal, the arrangement of antimony atoms changes at low temperatures, and the bonding between atoms is enhanced, resulting in a tighter structure, and thus the volume increases with decreasing temperature) will begin to expand, squeezing the perfluoroether rubber 26, causing the perfluoroether rubber 26 to deform to both sides to fill the gap, thereby achieving the function of ensuring the rigidity of the screw 11 in both hot and cold environments.

[0033] In response to the problems existing in the prior art, the utility model provides a high-temperature and high-pressure resistant automotive screw. When in a high-pressure environment, the screw rod 11 is squeezed. If the first nut 16 is loosened, the first nut 16 and the second nut 19 are installed in opposite directions. The first nut 16 and the second nut 19 will not loosen at the same time. A metal sheet 17 is installed inside the first nut 16 and the second nut 19. The metal sheet 17 will also absorb part of the force and play a certain buffering role. The cooperation of the round table 13 and the gasket 14 increases the contact area, and the pressure per unit area is reduced, thereby reducing the local pressure and reducing the impact on the The damage on the surface of the connecting part enhances the overall compressive resistance. The design of the trapezoidal thread 15 can improve the load-bearing capacity and self-locking performance, thereby effectively preventing loosening due to inaccurate precision. When the high temperature causes the screw 11 to expand, a gear groove 23 is opened inside the screw 11. If there is an object blocking the outside of the screw 11, it will expand in the direction of the gear groove 23. The gear groove 23 will provide sufficient space. The surface is coated with a nickel-based alloy coating 12, which can also increase the high temperature resistance of the screw 11. When the screw 11 expands outward, the annular groove 24 also provides space for the screw 11 to expand, preventing the screw 11 from breaking due to expansion.

[0034] Working principle:

[0035] In the first step, when under high pressure, the screw 11 is squeezed and if the first nut 16 becomes loose, the threaded installation directions of the first nut 16 and the second nut 19 are opposite, and the first nut 16 and the second nut 19 will not loosen at the same time, and metal sheets 17 are installed inside the first nut 16 and the second nut 19. The metal sheets 17 will also absorb part of the force and play a certain buffering role. The cooperation of the cone 13 and the gasket 14 increases the contact area, and the pressure per unit area is reduced, thereby reducing the local pressure, reducing the damage to the surface of the connector, and enhancing the overall pressure resistance. The design of the trapezoidal thread 15 can improve the load-bearing capacity and self-locking performance, thereby effectively preventing loosening due to inaccurate precision.

[0036] In the second step, when the high temperature causes the screw 11 to expand, a gear groove 23 is opened inside the screw 11. If there is an object blocking the outside of the screw 11, it will expand toward the gear groove 23. The gear groove 23 will provide sufficient space. The surface is coated with a nickel-based alloy coating 12, which can also increase the high temperature resistance of the screw 11. When the screw 11 expands outward, the annular groove 24 also provides space for the screw 11 to expand, preventing the screw 11 from breaking due to expansion.

[0037] Finally, it should be noted that the above embodiments are merely examples for the purpose of illustrating the present invention and are not intended to limit the embodiments. Those skilled in the art will readily appreciate that other variations or modifications based on the above description are possible. It is not necessary and impossible to provide an exhaustive list of all possible embodiments. However, any obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A high temperature and high pressure resistant automotive screw, comprising a screw rod (11), characterized in that: The side wall of the screw (11) is provided with a high-pressure resistant mechanism, and the high-pressure resistant mechanism includes a trapezoidal thread (15), a first nut (16), a metal sheet (17), a connecting tube (18) and a second nut (19); the trapezoidal thread (15) is fixedly mounted on the side wall of the screw (11); the first nut (16) is arranged on the side wall of the screw (11); the connecting tube (18) is fixedly mounted on the bottom of the first nut (16); the second nut (19) is fixedly mounted on the bottom of the connecting tube (18); and the metal sheet (17) is fixedly mounted inside the first nut (16) and the second nut (19); Wherein, the metal sheet (17) is threadedly mounted with the trapezoidal thread (15).

2. The high temperature and high pressure resistant automotive screw according to claim 1, characterized in that: The screw (11) and the side walls of the trapezoidal thread (15) are provided with a nickel-based alloy coating (12); Wherein, a round table (13) is fixedly installed on the top of the screw (11).

3. The high temperature and high pressure resistant automotive screw according to claim 2, characterized in that: A gasket (14) is fixedly mounted on the side wall of the screw (11); Wherein, the gasket (14) and the round table (13) are fixedly installed.

4. The high temperature and high pressure resistant automotive screw according to claim 3, characterized in that: A screw head (21) is fixedly mounted on the top of the circular table (13); Wherein, a hexagonal groove (22) is provided inside the screw head (21).

5. The high temperature and high pressure resistant automotive screw according to claim 3, characterized in that: A gear groove (23) is provided inside the screw (11); Wherein, a side wall of the screw (11) is provided with an annular groove (24).

6. The high temperature and high pressure resistant automotive screw according to claim 5, characterized in that: A conical block (25) is fixedly installed at the bottom of the screw (11), a perfluoroether rubber (26) is fixedly installed inside the screw (11), an antimony block (27) is fixedly installed at one end of the perfluoroether rubber (26) away from the screw (11), and a mounting column (28) is fixedly installed at one end of the antimony block (27) away from the perfluoroether rubber (26), and the mounting column (28) is fixedly installed inside the screw (11).

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