High-strength automobile fastening screw

Abstract

The utility model belongs to the technical field of screws, and particularly relates to a high-strength automobile fastening screw which comprises a bolt head, a gasket is fixedly connected to the lower portion of the bolt head, a screw rod is fixedly connected to the lower portion of the gasket, the bolt head, the gasket and the screw rod are integrally formed, a shaft core hole is formed in the surface of the bolt head, and the shaft core hole is connected with the gasket. A shaft core is arranged in the shaft core hole, and the upper end of the shaft core is fixedly connected with an end cover. According to the high-strength automobile fastening screw, the axis is arranged to be matched with the screw shaft core hole, the screw is inserted into the axis after being fastened, the lower section of the axis extrudes the surface of the shaft core hole, the thread is expanded, the gap between the thread and the threaded hole is reduced, the fastening strength is improved, and the problems that when an existing fastening screw is used, a nut is loosened due to vibration of a machine, and the screw is damaged are solved. And the technical problem that fastening of the part by the screw is affected is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of screws, in particular to a high-strength automobile fastening screw. Background Art

[0002] A screw is a tool that uses the physical and mathematical principles of the inclined circular rotation of an object and friction to gradually tighten objects and parts.

[0003] Screws are indispensable industrial necessities in daily life: such as tiny screws used in cameras, glasses, clocks, electronics, etc.; general screws used in televisions, electrical products, musical instruments, furniture, etc.; large screws and nuts used in engineering, construction, and bridges; and large and small screws used in transportation equipment, airplanes, trams, and cars. Screws have important tasks in industry, and as long as there is industry on earth, the function of screws will always be important.

[0004] The existing fastening screws may loosen the nuts due to the vibration of the machine during use, thereby affecting the fastening of the screws to the parts. Therefore, a new technical solution needs to be designed to solve this problem. Utility Model Content

[0005] Based on the technical problem that the nut of the existing fastening screws may become loose due to the vibration of the machine when in use, thereby affecting the fastening of the screws to the parts, the utility model proposes a high-strength automobile fastening screw.

[0006] The utility model provides a high-strength automobile fastening screw, comprising a bolt head, a gasket fixedly connected below the bolt head, a screw rod fixedly connected below the gasket, the bolt head, the gasket and the screw rod being integrally formed, an axial core hole being opened on the surface of the bolt head, an axial center being arranged inside the axial core hole, and an end cover being fixedly connected to the upper end of the axial center.

[0007] Preferably, the bolt head is a hexagonal bolt, the upper end of the bolt head is provided with a chamfer, and the axial core hole is coaxially arranged with the bolt head.

[0008] Preferably, the bolt head, the gasket and the screw rod are located on the same axis, a thread is formed at the lower end of the screw rod, and a chamfer is formed at the bottom of the screw rod.

[0009] Preferably, the shaft core hole passes through the bottom of the screw rod, the upper section of the shaft core hole is a straight hole, and the lower section of the shaft core hole is a tapered hole.

[0010] Preferably, the surface of the shaft center is movably connected to the surface of the shaft core hole, and the surface of the end cover is slidably connected to the surface of the bolt head.

[0011] Preferably, the upper diameter of the shaft center is matched with the upper diameter of the shaft core hole, and the taper of the shaft center is slightly larger than the taper of the shaft core hole.

[0012] The beneficial effects of the utility model are:

[0013] By arranging the axis to match the screw axis core hole, the axis is inserted after the screw is tightened, and the lower section of the axis squeezes the surface of the axis core hole to expand the thread, thereby reducing the gap between the thread and the threaded hole, improving the tightening strength, and solving the technical problem that the nut of the existing fastening screws may become loose due to the vibration of the machine during use, thereby affecting the tightening of the screw to the part. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of a high-strength automobile fastening screw proposed by the utility model;

[0015] Figure 2 This is a three-dimensional diagram of the shaft core hole structure of a high-strength automobile fastening screw proposed by the utility model;

[0016] Figure 3 The utility model is a three-dimensional diagram of the axial structure of a high-strength automobile fastening screw.

[0017] In the figure: 1. Bolt head; 2. Gasket; 3. Screw; 4. Shaft core hole; 5. Shaft center; 6. End cover; 7. Thread. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0019] Reference Figure 1-Figure 3 A high-strength automobile fastening screw comprises a bolt head 1, a gasket 2 is fixedly connected below the bolt head 1, a screw rod 3 is fixedly connected below the gasket 2, the bolt head 1, the gasket 2 and the screw rod 3 are integrally formed, an axial core hole 4 is opened on the surface of the bolt head 1, an axial core 5 is arranged inside the axial core hole 4, and an end cover 6 is fixedly connected to the upper end of the axial core 5.

[0020] The bolt head 1 is a hexagonal bolt, the upper end of the bolt head 1 is provided with a chamfer, and the axial core hole 4 is coaxially arranged with the bolt head 1.

[0021] Furthermore, the upper end of the bolt head 1 is chamfered.

[0022] The bolt head 1 , the washer 2 and the screw rod 3 are located on the same axis. A thread 7 is provided at the lower end of the screw rod 3 , and a chamfer is provided at the bottom of the screw rod 3 .

[0023] Furthermore, the bolt head 1 , the washer 2 and the screw rod 3 are integrally cast.

[0024] The shaft core hole 4 passes through the bottom of the screw rod 3 , the upper section of the shaft core hole 4 is a straight hole, and the lower section of the shaft core hole 4 is a tapered hole.

[0025] Furthermore, the interior of the thread 7 corresponds to a tapered hole.

[0026] The surface of the shaft center 5 is movably connected to the surface of the shaft core hole 4 , and the surface of the end cover 6 is slidably connected to the surface of the bolt head 1 .

[0027] Furthermore, the end cover 6 is convenient for knocking the shaft core 5 and forcing it into the shaft core hole 4 .

[0028] The upper diameter of the shaft core 5 matches the upper diameter of the shaft core hole 4 , and the taper of the shaft core 5 is slightly larger than the taper of the shaft core hole 4 .

[0029] Furthermore, the shaft core 5 is inserted into the shaft core hole 4 to extrude the inner wall of the thread 7 section.

[0030] By setting the axis 5 to cooperate with the screw axis core hole 4, the axis 5 is inserted after the screw is tightened, and the lower section of the axis 5 squeezes the surface of the axis core hole 4 to expand the thread 7, so that the gap between the thread 7 and the thread 7 hole is reduced, thereby improving the fastening strength, and solving the technical problem that the nut of the existing fastening screws may become loose due to the vibration of the machine during use, thereby affecting the fastening of the screw to the part.

[0031] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A high-strength automobile fastening screw, comprising a bolt head (1), characterized in that: A gasket (2) is fixedly connected below the bolt head (1), a screw rod (3) is fixedly connected below the gasket (2), the bolt head (1), the gasket (2) and the screw rod (3) are integrally formed, an axial core hole (4) is provided on the surface of the bolt head (1), an axial core (5) is provided inside the axial core hole (4), and an end cover (6) is fixedly connected to the upper end of the axial core (5).

2. A high-strength automotive fastening screw according to claim 1, characterized in that: The bolt head (1) is a hexagonal bolt, the upper end of the bolt head (1) is provided with a chamfer, and the axial core hole (4) is coaxially arranged with the bolt head (1).

3. The high-strength automotive fastening screw according to claim 1, characterized in that: The bolt head (1), the washer (2) and the screw rod (3) are located on the same axis; a thread (7) is provided at the lower end of the screw rod (3); and a chamfer is provided at the bottom of the screw rod (3).

4. The high-strength automotive fastening screw according to claim 1, characterized in that: The shaft core hole (4) passes through the bottom of the screw rod (3), the upper section of the shaft core hole (4) is a straight hole, and the lower section of the shaft core hole (4) is a tapered hole.

5. The high-strength automotive fastening screw according to claim 1, characterized in that: The surface of the shaft center (5) is movably connected to the surface of the shaft core hole (4), and the surface of the end cover (6) is slidably connected to the surface of the bolt head (1).

6. The high-strength automotive fastening screw according to claim 1, characterized in that: The upper diameter of the shaft center (5) matches the upper diameter of the shaft core hole (4), and the taper of the shaft center (5) is slightly larger than the taper of the shaft core hole (4).

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