Fastening type screw

Abstract

The utility model discloses a fastening type screw which comprises a screw head, a screw rod and a thread, one end of the screw rod is fixedly connected with the screw head, the other end of the thread is gradually shrunk into a tip end, the thread is arranged on the screw rod in a surrounding mode, a metal gasket and a rubber mat are sleeved on the screw rod, the metal gasket is located between the screw head and the rubber mat, and a plurality of protruding marks are arranged on the metal gasket in a protruding mode. Convex marks extend outwards from the center of the metal gasket in the radius direction of the metal gasket, the surfaces of the convex marks are in an arc shape, the convex marks are distributed around the center of the metal gasket in a circumferential array mode, a plurality of grooves are formed in the lower end of the screw head and correspond to the convex marks, and the section of each groove is in an arc shape. After the screw is locked, the rubber mat is clamped on the metal gasket and the surface of an object, due to the fact that the friction force between the rubber mat and the metal surface is large, the groove and the convex mark are formed, the convex mark is clamped into the groove, the friction force between the screw head and the metal gasket can be increased, and therefore the screw is prevented from loosening.

Description

Technical Field

[0001] The utility model relates to the technical field of fasteners, in particular to a fastening screw. Background Art

[0002] Screw refers to screw, which is a tool that uses the physics and mathematical principles of the circular rotation of the inclined surface of an object and the friction force to gradually tighten objects and parts. Screw is a general term for fasteners and a daily colloquialism. Screw is a common fastener that is widely used in machinery, electrical appliances and buildings. It is generally made of metal, cylindrical, and has concave and convex grooves on the surface called threads. Since objects and parts will vibrate during daily use, the screws installed on them will become loose as the objects and parts run for a long time, which may cause the built-in components of the objects and parts to detach, and then the objects and parts cannot work normally. Utility Model Content

[0003] In order to solve the above-mentioned deficiencies in the prior art, the utility model provides a fastening screw.

[0004] In order to achieve the above technical effects, the utility model adopts the following scheme:

[0005] A fastening screw comprises a screw head, a screw rod and a thread, wherein one end of the screw rod is fixedly connected to the screw head, and the other end of the thread gradually narrows to a tip, and the thread is arranged around the screw rod, and a metal gasket and a rubber gasket are sleeved on the screw rod, and the metal gasket is located between the screw head and the rubber gasket, and a plurality of convex marks are protruding from the metal gasket, and the convex marks extend outward from the center of the metal gasket along the radius direction of the metal gasket, and the surface of the convex marks is in an arc shape, and the plurality of convex marks are distributed in a circular array around the center of the metal gasket, and a plurality of grooves are provided at the lower end of the screw head, and the grooves correspond to the convex marks, and the cross-sectional shape of the grooves is in an arc shape.

[0006] According to a preferred technical solution, at least one thread cut is provided on the thread, and the thread cut is inclined along the length direction of the screw.

[0007] A preferred technical solution is that a tool groove is formed at one end of the screw head away from the screw rod, and a S-shaped groove, a cross groove or a Pozidriv groove is formed at the bottom of the tool groove. A rubber plug is provided on the screw head which is partially inserted into the tool groove, and the cross-section of the rubber plug is arranged in a "T" shape.

[0008] According to a preferred technical solution, the screw rod and the screw head are integrally formed.

[0009] According to a preferred technical solution, a dovetail piece is fixedly provided on the side wall of the tip of the screw.

[0010] Compared with the prior art, the beneficial effects are:

[0011] The utility model has a simple structure and is easy to use. By adding a metal gasket and a rubber gasket, after locking the screw, the rubber gasket is clamped between the metal gasket and the surface of the object. Since the friction between the rubber gasket and the metal surface is large, and the grooves and convex marks are provided, the convex marks are inserted into the grooves to increase the friction between the screw head and the metal gasket, thereby preventing the screw from loosening. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model;

[0013] Figure 2 It is a cross-sectional schematic diagram of the utility model;

[0014] Figure 3 yes Figure 1 A schematic diagram of the enlarged structure of part A.

[0015] Figure markings: 1. screw head; 2. screw rod; 3. thread; 4. tip; 5. metal gasket; 6. rubber gasket; 7. thread cut; 8. dovetail piece; 9. convex mark; 10. rubber plug; 11. tool groove; 12. slot; 13. groove. DETAILED DESCRIPTION

[0016] 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.

[0017] A fastening screw comprises a screw head 1, a screw rod 2 and a thread 3, wherein one end of the screw rod 2 is fixedly connected to the screw head 1, and the other end of the thread 3 is gradually reduced to a tip 4, and the thread 3 is arranged around the screw rod 2, and a metal gasket 5 and a rubber gasket 6 are sleeved on the screw rod 2, and the metal gasket 5 is located between the screw head 1 and the rubber gasket 6, and a plurality of convex marks 9 are protruding from the metal gasket 5, and the convex marks 9 extend outward from the center of the metal gasket 5 along the radius direction of the metal gasket 5, and the surface of the convex marks 9 is in an arc shape, and a plurality of convex marks 9 are distributed in a circular array around the center of the metal gasket 5, and a plurality of grooves 13 are opened at the lower end of the screw head 1, and the grooves 13 correspond to the convex marks 9, and the cross-sectional shape of the grooves 13 is in an arc shape.

[0018] The surface of the machine and the metal gasket 5 are both made of metal, and the surface is generally smooth, and the friction with rubber is large. Therefore, after the screw is tightened, the rubber gasket 6 is clamped between the metal gasket 5 and the surface of the object, increasing the friction between the metal gasket 5 and the object. In addition, because of the convex marks 9 and the grooves 13 on the metal gasket 5 and the screw head 1, the convex marks 9 are stuck in the grooves 13, increasing the friction between the metal gasket 5 and the screw head 1, thereby preventing the screw from loosening. In the process of tightening the screw, when the metal gasket 5 is pressed against the rubber gasket 6 and does not rotate, when the screw head 1 is rotated by an external force, the rubber gasket 6 is elastic and will be squeezed inward, so the convex marks 9 with arc shapes on the surface can be squeezed out of the arc-shaped grooves 13, so that the screw head 1 can continue to rotate.

[0019] According to a preferred technical solution, at least one thread cut 7 is provided on the thread 3 , and the thread cut 7 is inclined along the length direction of the screw rod 2 .

[0020] The thread cutout 7 increases the friction between the thread 3 and the inner wall of the thread 3 hole of the object, further preventing the screw from loosening.

[0021] According to a preferred technical solution, a tool groove 11 is provided at one end of the screw head 1 away from the screw rod 2, and a straight groove 12, a cross groove or a Pozidriv groove is provided at the bottom of the tool groove 11. A rubber plug 10 is provided on the screw head 1 and partially inserted into the tool groove 11, and the cross-section of the rubber plug 10 is arranged in a "T" shape.

[0022] By plugging the rubber plug 10 at the notch of the tool groove 11, it is possible to prevent liquid from entering and prevent the internal I-shaped groove 12, the cross groove or the Pozi groove from being corroded.

[0023] According to a preferred technical solution, the screw rod 2 and the screw head 1 are integrally formed.

[0024] Improve the strength of the overall screw to prevent breakage during use.

[0025] According to a preferred technical solution, a dovetail piece 8 is fixedly provided on the side wall of the tip 4 of the screw rod 2 .

[0026] By scraping the inner wall of the screw hole of the object with the dovetail piece 8, impurities such as hair scraps on the inner wall of the screw hole can be removed, so that the screw can be screwed into the screw hole more easily.

[0027] In the description of the present utility model, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present utility model.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0029] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.

Claims

1. A fastening screw, characterized in that: The invention comprises a screw head (1), a screw rod (2) and a thread (3), wherein one end of the screw rod (2) is fixedly connected to the screw head (1), and the other end of the thread (3) is gradually narrowed to a tip (4), and the thread (3) is arranged around the screw rod (2), and a metal gasket (5) and a rubber gasket (6) are sleeved on the screw rod (2), and the metal gasket (5) is located between the screw head (1) and the rubber gasket (6), and a plurality of convex marks (9) are protruding from the metal gasket (5), and the convex marks (9) extend outward from the center of the metal gasket (5) along the radius direction of the metal gasket (5), and the surface of the convex marks (9) is in an arc shape, and the plurality of convex marks (9) are distributed in a circular array around the center of the metal gasket (5), and a plurality of grooves (13) are opened at the lower end of the screw head (1), and the grooves (13) correspond to the convex marks (9), and the cross-sectional shape of the grooves (13) is in an arc shape; The thread (3) is provided with at least one thread cutout (7), and the thread cutout (7) is arranged obliquely along the length direction of the screw rod (2).

2. A fastening screw according to claim 1, characterized in that: A tool groove (11) is formed at one end of the screw head (1) away from the screw rod (2); a straight groove (12), a cross groove or a Pozidriv groove is formed at the bottom of the tool groove (11); a rubber plug (10) is provided on the screw head (1) and is partially inserted into the tool groove (11); and the cross section of the rubber plug (10) is arranged in a "T" shape.

3. A fastening screw according to claim 1, characterized in that: The screw rod (2) and the screw head (1) are integrally formed.

4. A fastening screw according to claim 1, characterized in that: A dovetail piece (8) is fixedly provided on the side wall of the tip (4) of the screw rod (2).

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