High-strength anti-corrosion fastener for automobile engine and forming process of high-strength anti-corrosion fastener

Abstract

The invention discloses a high-strength anti-corrosion fastener for an automobile engine and a forming process of the high-strength anti-corrosion fastener, and belongs to the technical field of fasteners. The high-strength anti-corrosion fastener for the automobile engine comprises a screw rod and a nut, the nut is fixedly connected to the surface of the top end of the screw rod, a connecting sleeve is connected to the surface of a groove, a connecting block is fixedly connected to the outer wall of the connecting sleeve, and a circular ring is rotationally connected to the surface of the connecting sleeve. According to the high-strength anti-corrosion fastener for the automobile engine, a circular ring is connected with a groove, a connecting sleeve is rotated, an extrusion block extrudes and pushes a pressing block, a rubber pad extrudes the surface of a screwdriver, and therefore the screwdriver is clamped, it is guaranteed that a bolt can still be disassembled under the condition that the screw is slipped; the air in the air bin is extruded through the connecting rod in the rubber pad, so that the connecting rod which is not in contact with the screwdriver is pushed to slide outwards, the surface of the screwdriver is extruded, and the bolt can still be disassembled when screwdrivers of other models are used.

Description

Technical Field

[0001] The present invention relates to the technical field related to fasteners, and in particular to a high-strength anti-corrosion fastener for an automobile engine and a molding process thereof. Background Art

[0002] Fasteners are a type of mechanical parts used for fastening connections and are extremely widely used. Various fasteners can be seen on various machinery, equipment, vehicles, ships, railways, bridges, buildings, structures, tools, instruments, meters and supplies. They are characterized by a wide variety of varieties and specifications, different performances and uses, and a high degree of standardization, serialization and generalization.

[0003] Chinese patent CN111692190A, authorized and announced on September 22, 2020, discloses an anti-loosening bolt structure, in which the plastic part and the plastic sleeve are fitted with the inside of the threaded hole by tightening the anti-loosening sleeve, and a beveled tooth surface is formed at the bottom of the top ring that fits with the beveled tooth surface at the top of the anti-loosening washer, and a threaded ring is formed from the inside to the outside of the bottom of the anti-loosening washer. During the tightening of the anti-loosening sleeve, the beveled tooth surface fits with the beveled tooth surface and rotates to make the threaded ring fit with the top of the connected part. The installation is convenient, the anti-loosening precision is high, and the bolt connection structure is effectively prevented from loosening, ensuring the reliability of the bolt connection structure. However, during the disassembly process of the anti-loosening bolt structure, once the connection between the groove and the screwdriver encounters slippage, or there is no screwdriver that matches the groove, the difficulty of disassembling the bolt will be increased, thereby affecting the maintenance work of the engine, making it still relatively inconvenient when used. Summary of the Invention

[0004] The purpose of the present invention is to provide a high-strength anti-corrosion fastener for automobile engines to solve the problem that during the disassembly process of the existing anti-loosening bolt structure proposed in the above background technology, if the connection between the groove and the screwdriver is slipped, or there is no screwdriver that matches the groove, it will increase the difficulty of disassembling the bolt, thereby affecting the engine maintenance work and making it still relatively inconvenient when used.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a high-strength anti-corrosion fastener for an automobile engine, comprising a screw and a nut, the inner wall surface of the lower connecting plate being threadedly connected to the screw, the outer wall of the screw being penetrated by an upper connecting plate, the top surface of the screw being fixedly connected to the nut, the surface of the nut being provided with a slot, the surface of the nut being provided with a groove, the surface of the groove being connected to a connecting sleeve, the inner wall of the connecting sleeve being fixedly connected to an extrusion block, the outer wall of the connecting sleeve being fixedly connected to a connecting block, the bottom end of the connecting sleeve being rotatably connected to a circular ring, the outer wall of the circular ring being fixedly connected to a limiting block, the outer wall of the circular ring being fixedly connected to a slide rail, the outer wall of the slide rail being slidably connected to a slider, the outer wall of the slider being fixedly connected to a pressing block, and the outer wall of the pressing block being bonded with a rubber pad.

[0006] Preferably, the screw is a coarse-rod half-thread screw.

[0007] Preferably, a thread groove is provided on the inner wall of the upper connecting plate, and the upper half of the screw is connected to a rubber sleeve.

[0008] Preferably, a connecting groove is provided on the inner wall of the groove, a limiting groove is provided on the inner wall of the groove, a rotating groove is provided on the inner wall of the groove, and the connecting groove, the limiting groove and the rotating groove are connected to each other.

[0009] Preferably, a spring is connected to the interior of the slide rail, and one end of the spring is fixedly connected to the slider, and the slider forms a telescopic structure with the slide rail through the spring.

[0010] Preferably, an air chamber is provided inside the pressing block, a connecting hole is provided on the surface of the pressing block, a connecting rod is slidably connected to the inner wall of the connecting hole, and one end of the connecting rod is fixedly connected to the rubber pad.

[0011] Preferably, one end surface of the extrusion block is a concave surface, and a layer of rubber sheet is bonded to the surface of the concave surface.

[0012] Preferably, an anti-slip groove is provided on the outer wall of the connecting sleeve.

[0013] A molding process for high-strength anti-corrosion fasteners for automobile engines comprises the following steps:

[0014] S1: Degreasing: First, soak the carbon steel in a pickling tank to remove oil and rust on the surface of the carbon steel;

[0015] S2: Cutting steel bars. After the carbon steel is soaked, it is straightened by a straightening machine and cut into steel bars for making bolts.

[0016] S3: die, which punches the steel bar through a die machine to form a hexagonal nut at one end of the steel bar;

[0017] S4: Chamfer, a chamfer is pressed out on the other end of the steel bar by an extruder to guide the rotation of the nut and prevent the straight edge from cutting your fingers;

[0018] S5: Thread rolling, the surface of the steel bar is formed into the texture of the bolt by the rotation and extrusion of the two groove plates of the thread rolling machine;

[0019] S6: For corrosion protection, the concentrated zinc solution is first preheated, and then the bolts are immersed in the solution to allow a chemical reaction between the zinc and the steel to form a zinc-iron alloy layer.

[0020] Compared with the prior art, the beneficial effect of the present invention is that when the bolt is disassembled and the thread is slipped, by connecting the ring with the groove and rotating the connecting sleeve, the extrusion block squeezes and pushes the pressing block, and the rubber pad squeezes the surface of the screwdriver, thereby clamping the screwdriver, ensuring that the bolt can still be disassembled in the case of thread slippage. When using other types of screwdrivers, the air inside the air chamber is squeezed through the connecting rod inside the rubber pad, thereby pushing the connecting rod that is not in contact with the screwdriver to slide outward, thereby squeezing the surface of the screwdriver, so that the bolt can still be disassembled when using other types of screwdrivers. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the side appearance structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of the connection groove and the limiting groove cooperating with each other in the present invention;

[0023] Figure 3 This is a schematic diagram of the structure of the nut and the connecting sleeve cooperating with each other in the present invention;

[0024] Figure 4 This is a schematic diagram of the structure of the connecting sleeve and the ring cooperating with each other in the present invention;

[0025] Figure 5 This is a schematic diagram of the structure of the extrusion block of the present invention;

[0026] Figure 6 This is a schematic diagram of the structure in which the connecting hole and the connecting rod cooperate with each other in the present invention.

[0027] In the figure: 1. Lower connecting plate; 2. Screw; 3. Upper connecting plate; 4. Threaded groove; 5. Rubber sleeve; 6. Nut; 7. Slot; 8. Groove; 9. Connecting groove; 10. Limiting groove; 11. Rotating groove; 12. Connecting sleeve; 13. Anti-slip groove; 14. Extrusion block; 15. Connecting block; 16. Ring; 17. Limiting block; 18. Slide rail; 19. Spring; 20. Slider; 21. Pressing block; 22. Rubber pad; 23. Air chamber; 24. Connecting hole; 25. Connecting rod. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] See also Figure 1-6 The present invention provides a technical solution: a high-strength anti-corrosion fastener for an automobile engine, comprising a screw 2 and a nut 6, the inner wall surface of the lower connecting plate 1 is threadedly connected to the screw 2, the outer wall of the screw 2 is penetrated by the upper connecting plate 3, the top surface of the screw 2 is fixedly connected to the nut 6, the surface of the nut 6 is provided with a slot 7, the surface of the nut 6 is provided with a groove 8, the surface of the groove 8 is connected to a connecting sleeve 12, the inner wall of the connecting sleeve 12 is fixedly connected to an extrusion block 14, the outer wall of the connecting sleeve 12 is fixedly connected to a connecting block 15, the bottom end of the connecting sleeve 12 is rotatably connected to a ring 16, the outer wall of the ring 16 is fixedly connected to a limiting block 17, the outer wall of the ring 16 is fixedly connected to a slide rail 18, the outer wall of the slide rail 18 is slidably connected to a slider 20, the outer wall of the slider 20 is fixedly connected to a pressing block 21, and the outer wall of the pressing block 21 is bonded with a rubber pad 22.

[0030] Furthermore, the screw 2 is a thick-rod half-thread screw. Compared with the full-thread screw, the half-thread screw has the advantages of higher load-bearing capacity, easy disassembly and wider application range.

[0031] Furthermore, a thread groove 4 is opened on the inner wall of the upper connecting plate 3, and the upper half of the screw 2 is connected to a rubber sleeve 5. Through the setting of the thread groove 4 and the rubber sleeve 5, when the screw 2 is connected, the screw 2 will squeeze the upper connecting plate 3 and the rubber sleeve 5. After being squeezed, the rubber sleeve 5 will be deformed and expand outward, so that the surface of the rubber sleeve 5 and the surface of the thread groove 4 fit each other, thereby increasing the friction between the screw 2 and the upper connecting plate 3, and improving the stability of the screw 2 fixing the upper connecting plate 3.

[0032] Furthermore, a connecting groove 9 is provided on the inner wall of the groove 8, a limiting groove 10 is provided on the inner wall of the groove 8, and a rotation groove 11 is provided on the inner wall of the groove 8, and the connecting groove 9, the limiting groove 10 and the rotation groove 11 are connected to each other. Through the setting of the connecting groove 9, the limiting groove 10 and the rotation groove 11, first, the connecting sleeve 12 and the ring 16 are slid into the interior of the groove 8 through the sliding connection of the limiting block 17 and the connecting block 15 with the connecting groove 9. When the connecting sleeve 12 and the ring 16 completely slide into the interior of the groove 8, the limiting block 17 enters the interior of the limiting groove 10, and the connecting block 15 and the rotation groove 11 are on the same horizontal line. Then, the connecting sleeve 12 is rotated to make the connecting block 15 slide into the interior of the rotation groove 11, and the limiting groove 10 limits the limiting block 17 to prevent the connecting sleeve 12 from driving the ring 16 to rotate synchronously during rotation.

[0033] Furthermore, a spring 19 is connected to the inside of the slide rail 18, and one end of the spring 19 is fixedly connected to the slider 20. The slider 20 forms a telescopic structure with the slide rail 18 through the spring 19. Through the setting of the spring 19, the spring 19 can push the slider 20 to reset when the slider 20 is not subjected to external force.

[0034] Furthermore, an air chamber 23 is provided inside the pressing block 21, and a connecting hole 24 is provided on the surface of the pressing block 21. A connecting rod 25 is slidably connected to the inner wall of the connecting hole 24, and one end of the connecting rod 25 is fixedly connected to the rubber pad 22. Through the setting of the connecting rod 25, when other types of screwdrivers are used, when the surface of the rubber pad 22 squeezes the screwdriver, the connecting rod 25 inside the rubber pad 22 slides toward the inside of the connecting hole 24 under the action of external force, and squeezes the air inside it into the air chamber 23, and squeezes the air inside the air chamber 23. After being squeezed, the air inside the air chamber 23 will push the connecting rod 25 that is not in contact with the screwdriver, and move the rubber pad 22 at its front end outward, thereby squeezing the surface of the screwdriver.

[0035] Furthermore, one end surface of the extrusion block 14 is concave, and a layer of rubber sheet is bonded to the concave surface. Through the setting of the extrusion block 14, when the connecting block 15 completely slides into the interior of the rotating groove 11, the concave surface of the extrusion block 14 is just stuck on the surface of the pressing block 21, and the friction between the extrusion block 14 and the pressing block 21 is increased by the rubber sheet, thereby improving the stability when the extrusion block 14 and the pressing block 21 are connected.

[0036] Furthermore, an anti-skid groove 13 is provided on the outer wall of the connecting sleeve 12 . Through the provision of the anti-skid groove 13 , the anti-skid groove 13 can increase the friction between the connecting sleeve 12 and the palm, thereby ensuring stability when rotating the connecting sleeve 12 .

[0037] The present invention also provides an embodiment of a method for using a high-strength anti-corrosion fastener for an automobile engine:

[0038] S1: Degreasing: First, soak the carbon steel in a pickling tank to remove oil and rust on the surface of the carbon steel;

[0039] S2: Cutting steel bars. After the carbon steel is soaked, it is straightened by a straightening machine and cut into steel bars for making bolts.

[0040] S3: a punching die, which punches the steel bar through a punching die machine to form a hexagonal nut 6 at one end of the steel bar;

[0041] S4: Chamfer, a chamfer is pressed out on the other end of the steel bar by an extruder to guide the rotation of the nut and prevent the straight edge from cutting your fingers;

[0042] S5: Thread rolling, the surface of the steel bar is formed into the texture of the bolt by the rotation and extrusion of the two groove plates of the thread rolling machine;

[0043] S6: For corrosion protection, the concentrated zinc solution is first preheated, and then the bolts are immersed in the solution to allow a chemical reaction between the zinc and the steel to form a zinc-iron alloy layer.

[0044] Working principle: When the bolts are disassembled and the thread is stripped, first slide the connecting sleeve 12 and the ring 16 into the interior of the groove 8 through the sliding connection between the limit block 17 and the connecting block 15 and the connecting groove 9. After the connecting sleeve 12 and the ring 16 have completely slid into the interior of the groove 8, the limit block 17 enters the interior of the limit groove 10, and the connecting block 15 and the rotating groove 11 are on the same horizontal line. Then, the connecting sleeve 12 is rotated to make the connecting block 15 slide into the interior of the rotating groove 11, and the limit groove 10 limits the limit block 17 to prevent the connecting sleeve 12 from driving the ring 16 to rotate synchronously during rotation, so that the extrusion block 14 on the inner wall of the connecting sleeve 12 squeezes the surface of the pressing block 21, thereby pushing the pressing block 21 to continue to slide on the surface of the slide rail 18, so that the pressing block 2 The rubber pad 22 on the surface of the screwdriver squeezes the surface of the screwdriver, so that the screwdriver can still complete the removal of the bolt in the event of thread slippage. At the same time, when using other types of screwdrivers, when the surface of the rubber pad 22 squeezes the screwdriver, the connecting rod 25 inside the rubber pad 22 slides toward the inside of the connecting hole 24 under the action of external force, and squeezes the air inside it into the air chamber 23, and squeezes the air inside the air chamber 23. After being squeezed, the air inside the air chamber 23 pushes the connecting rod 25 that is not in contact with the screwdriver, and moves the rubber pad 22 at its front end outward, thereby squeezing the surface of the screwdriver, so that when using other types of screwdrivers, the bolt can still be removed. In this way, the use process of a high-strength anti-corrosion fastener for automobile engines is completed.

[0045] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A high-strength anti-corrosion fastener for an automobile engine, comprising a screw (2) and a nut (6), characterized in that: The inner wall surface of the lower connecting plate (1) is threadedly connected to a screw rod (2), the outer wall of the screw rod (2) is penetrated by an upper connecting plate (3), the top surface of the screw rod (2) is fixedly connected to a nut (6), the surface of the nut (6) is provided with a slot (7), the surface of the nut (6) is provided with a groove (8), the surface of the groove (8) is connected to a connecting sleeve (12), the inner wall of the connecting sleeve (12) is fixedly connected to an extrusion block (14), the connecting sleeve (12) is fixedly connected to the inner wall of the connecting sleeve (12), and the connecting sleeve (12) is fixedly connected to the inner wall of the connecting sleeve (12). ) is fixedly connected to the outer wall of a connecting block (15), the bottom end of the connecting sleeve (12) is rotatably connected to a circular ring (16), a limiting block (17) is fixedly connected to the outer wall of the circular ring (16), a slide rail (18) is fixedly connected to the outer wall of the circular ring (16), a slider (20) is slidably connected to the outer wall of the slide rail (18), a pressing block (21) is fixedly connected to the outer wall of the slider (20), and a rubber pad (22) is bonded to the outer wall of the pressing block (21).

2. The high-strength anti-corrosion fastener for automobile engines according to claim 1, characterized in that: The screw (2) is a coarse-rod, half-thread screw.

3. The high-strength anti-corrosion fastener for automobile engines according to claim 1, characterized in that: A thread groove (4) is provided on the inner wall of the upper connecting plate (3), and the upper half of the screw rod (2) is connected to a rubber sleeve (5).

4. The high-strength anti-corrosion fastener for automobile engines according to claim 1, characterized in that: A connecting groove (9) is provided on the inner wall of the groove (8), a limiting groove (10) is provided on the inner wall of the groove (8), and a rotating groove (11) is provided on the inner wall of the groove (8), and the connecting groove (9), the limiting groove (10) and the rotating groove (11) are connected to each other.

5. The high-strength anti-corrosion fastener for automobile engines according to claim 1, characterized in that: The interior of the slide rail (18) is connected with a spring (19), and one end of the spring (19) is fixedly connected to a slider (20). The slider (20) forms a telescopic structure with the slide rail (18) through the spring (19).

6. The high-strength anti-corrosion fastener for automobile engines according to claim 1, characterized in that: An air chamber (23) is provided inside the pressing block (21), a connecting hole (24) is provided on the surface of the pressing block (21), a connecting rod (25) is slidably connected to the inner wall of the connecting hole (24), and one end of the connecting rod (25) is fixedly connected to the rubber pad (22).

7. The high-strength anti-corrosion fastener for automobile engines according to claim 1, characterized in that: One end surface of the extrusion block (14) is a concave surface, and a layer of rubber sheet is bonded to the surface of the concave surface.

8. The high-strength anti-corrosion fastener for automobile engines according to claim 1, characterized in that: An anti-slip groove (13) is provided on the outer wall of the connecting sleeve (12).

9. The molding process of a high-strength anti-corrosion fastener for an automobile engine according to claim 1, characterized in that: The following steps are involved: S1: Degreasing: First, soak the carbon steel in a pickling tank to remove oil and rust on the surface of the carbon steel; S2: Cutting steel bars. After the carbon steel is soaked, it is straightened by a straightening machine and cut into steel bars for making bolts. S3: a punching die, which punches the steel bar through a punching die machine, thereby forming a hexagonal nut (6) at one end of the steel bar; S4: Chamfer, a chamfer is pressed out on the other end of the steel bar by an extruder to guide the rotation of the nut and prevent the straight edge from cutting your fingers; S5: Thread rolling, the surface of the steel bar is formed into the texture of the bolt by the rotation and extrusion of the two groove plates of the thread rolling machine; S6: For corrosion protection, the concentrated zinc solution is first preheated, and then the bolts are immersed in the solution to allow a chemical reaction between the zinc and the steel to form a zinc-iron alloy layer.

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