Waterproof combined self-tapping screw

Abstract

The utility model provides a waterproof combined self-tapping screw, and relates to the technical field of self-tapping screw waterproofing, the waterproof combined self-tapping screw comprises a head part, a thread part, a separation blade, a groove, a sleeve and a sealing gasket, the sealing gasket is located in the groove, the sleeve can rotate in the groove through the sealing gasket, the outer surface of the sleeve is connected with a sealing cover, and the sealing cover is connected with the thread part. The sealing cover is connected with the other end of the sleeve in a clamped mode, an oil storage cavity is formed in the outer surface of the sleeve, the oil storage cavity is connected with the sleeve in a penetrating mode, and anti-rust oil is stored in the oil storage cavity, and according to the waterproof combined self-tapping screw, through cooperation of the sealing cover and the sleeve, the head of the self-tapping screw can be kept in a relatively-closed space, so that the waterproof capacity of the self-tapping screw is improved; meanwhile, through the oil storage cavity and the anti-rust oil in the oil storage cavity, the head, located in the relatively closed space, of the self-tapping screw can be wrapped by the anti-rust oil, so that corrosion of water vapor to the head of the self-tapping screw is reduced, the head of the self-tapping screw can be effectively protected, and later disassembly is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to self tapping screw waterproof technical field, specifically is a waterproof combination self tapping screw. BACKGROUND

[0002] Self tapping screw is a kind of threaded fastener in the metal or non-metal material pre-drilled hole self tapping thread. Self tapping screw is mostly used between thin metal plate (steel plate, saw plate etc.). When connecting, first make the threaded bottom hole to the connected piece, then screw the self tapping screw into the threaded bottom hole of the connected piece. Because the threaded surface of self tapping screw has high hardness, it can tap the internal thread in the threaded bottom hole of the connected piece, thereby forming the connection.

[0003] Although self tapping screw has the characteristics of convenient quick installation, but the waterproof capacity of traditional self tapping screw is poor, and the head of screw is prone to rust, which has certain difficulty in disassembly. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a waterproof combination self tapping screw, to solve the problems mentioned in the above background technology.

[0005] To achieve the above object, the utility model adopts the following technical scheme: the waterproof combination self tapping screw, including head and threaded part, the head is provided with the baffle between threaded part, the one end of head is provided with annular recess with baffle connection, still include the sleeve of two ends opening, the one end of sleeve is provided with annular sealing washer, sealing washer is located in the inside of recess, the sleeve can rotate in recess through sealing washer, the outer surface of sleeve is connected with the cover, the cover is clamped with the other end of sleeve, the outer surface of sleeve is provided with oil storage cavity, oil storage cavity is connected with sleeve through, the inside of oil storage cavity stores rust preventive oil.

[0006] Preferably, the outer surface of the sleeve is provided with a first annular protrusion, the inner surface of the cover is provided with a second annular protrusion, when the cover is clamped on the sleeve, the second annular protrusion is located between the first annular protrusion and the baffle, and the first annular protrusion and the second annular protrusion are in extrusion contact with each other.

[0007] Preferably, the oil storage cavity has a pressing area, the pressing area on the oil storage cavity is located on two sides of the oil storage cavity, when the threaded part is perpendicular to the workpiece surface, the two sides of the pressing area are also perpendicular to the workpiece surface.

[0008] Preferably, the inside of the cover is provided with a limiting ring, after the cover is clamped with the sleeve, the first annular protrusion is located between the second annular protrusion and the limiting ring, and the limiting ring abuts against one end of the sleeve.

[0009] Preferably, the inside of the groove is provided with an annular bottom ring, the bottom ring is located at the inner side of the sealing gasket, and the bottom ring and the sealing gasket are both made of rubber.

[0010] The utility model discloses beneficial effect is:

[0011] The waterproof combined self-tapping screw can keep the head of the self-tapping screw in a relatively closed space by cooperation of the cover and the sleeve, improve the waterproof capacity of the self-tapping screw, and can wrap the head of the self-tapping screw in the relatively closed space with rust-proof oil in the oil storage cavity and the rust-proof oil in the oil storage cavity, reduce rust of the head of the self-tapping screw by water vapor, effectively protect the head of the self-tapping screw, and facilitate later disassembly. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is the structure schematic diagram of the embodiment of the utility model.

[0013] Figure 2 It is the structure schematic diagram of the sleeve inside.

[0014] Figure 3 It is Figure 2 The partial close-up view of A in Fig.

[0015] Figure 4 It is Figure 2 The partial close-up view of B in Fig.

[0016] In the drawing: 1, head; 2, threaded portion; 3, baffle; 4, sleeve; 5, sealing gasket; 6, cover; 7, oil storage cavity; 8, first annular protrusion; 9, second annular protrusion; 10, pressing area; 11, limiting ring; 12, bottom ring. DETAILED DESCRIPTION

[0017] The specific embodiment of the utility model is further explained in combination with the drawings.

[0018] As Figures 1-4 Indicated, a kind of waterproof combined self-tapping screw, including head 1 and threaded portion 2, baffle 3 is provided between head 1 and threaded portion 2, and one end of baffle 3 in head 1 is provided with annular groove, still include sleeve 4 of two ends opening, one end of sleeve 4 is provided with annular sealing gasket 5, sealing gasket 5 is located in the inside of groove, and sleeve 4 can rotate in groove by sealing gasket 5, the outer surface of sleeve 4 is connected with cover 6, cover 6 is clamped with the other end of sleeve 4, the outer surface of sleeve 4 is provided with oil storage cavity 7, and oil storage cavity 7 is connected with sleeve 4, and rust-proof oil is stored in the inside of oil storage cavity 7.

[0019] When the self-tapping screw is used, one hand holds the oil storage cavity 7, and the other hand holds the electric drill. Since the oil storage cavity 7 is manually held, the stability of the self-tapping screw can be improved, the electric drill and the head 1 of the self-tapping screw can be aligned, and the threaded portion 2 of the self-tapping screw and the workpiece can be aligned, thereby improving the convenience of using the self-tapping screw. After the blocking piece 3 contacts the workpiece, the self-tapping screw is stopped, and then the cover 6 is rotated to be clamped at one end of the sleeve 4. Before this, the oil storage cavity 7 is always located below the sleeve 4. After the cover 6 closes one end of the sleeve 4, the oil storage cavity 7 is rotated to drive the sleeve 4 to rotate. The oil storage cavity 7 can be moved from below the sleeve 4 to above the sleeve 4. At this time, the rust-proof oil in the oil storage cavity 7 can enter the sleeve 4 and the cover 6 under the action of gravity. The rust-proof oil in the oil storage cavity 7 can fill and cover the head 1 of the self-tapping screw. Through the combination of the cover and the sleeve 4, the waterproof capability of the self-tapping screw is improved, and the rust-proof oil is internally provided to reduce the entry of external water vapor between the cover and the sleeve 4, which can further improve the waterproof capability of the head 1 of the self-tapping screw.

[0020] When the self-tapping screw needs to be disassembled, the oil storage cavity 7 is first rotated to below the sleeve 4, and a period of time is waited so that the rust-proof oil in the cover 6 and the sleeve 4 can flow back to the oil storage cavity 7. After most of the rust-proof oil flows back to the oil storage cavity 7, the cover 6 is opened, one hand holds the oil storage cavity 7, and the other hand uses the electric drill to disassemble the self-tapping screw.

[0021] Further, the outer surface of the sleeve 4 is provided with a first annular protrusion 8, and the inner surface of the cover 6 is provided with a second annular protrusion 9. When the cover 6 is clamped on the sleeve 4, the second annular protrusion 9 is located between the first annular protrusion 8 and the blocking piece 3, and the first annular protrusion 8 and the second annular protrusion 9 are in extrusion contact with each other. The sleeve 4 and the cover 6 are both made of plastic material, and the deformation resistance of the sleeve 4 is stronger than that of the cover 6. During the clamping process of the cover 6 on the sleeve 4, the deformation degree of the cover 6 is greater than that of the sleeve 4. Therefore, the second annular protrusion 9 on the cover 6 can pass through the first annular protrusion 8, and the extrusion contact between the first annular protrusion 8 and the second annular protrusion 9 can improve the sealing performance between the cover 6 and the sleeve 4, thereby reducing the entry of water vapor between the cover 6 and the sleeve 4.

[0022] Further, the oil storage cavity 7 has a pressing area 10 on it. The pressing area 10 on the oil storage cavity 7 is located on both sides of the oil storage cavity 7. When the threaded portion 2 is perpendicular to the surface of the workpiece, the two sides of the pressing area 10 are also perpendicular to the surface of the workpiece. When the oil storage cavity 7 moves to the upper surface of the sleeve 4, the pressing area 10 on the oil storage cavity 7 can be pressed to speed up the entry of the rust-proof oil in the oil storage cavity 7 into the cover 6 and the sleeve 4. The oil storage cavity 7 is also made of plastic material.

[0023] When the self-tapping screw is used in a non-horizontal state, after the self-tapping screw is fixed, the rust-proof oil in the oil storage cavity 7 can be squeezed out through the pressing area 10, so that the head 1 surface of the self-tapping screw is coated with an oil film, even if the rust-proof oil flows back into the oil storage cavity 7, the oil film formed can protect the head 1 of the self-tapping screw, so as to improve the waterproof and rust-proof ability.

[0024] Further, the inside of the cover 6 is provided with a limiting ring 11, after the cover 6 is clamped with the sleeve 4, the first annular protrusion 8 is located between the second annular protrusion 9 and the limiting ring 11, and the limiting ring 11 abuts against one end of the sleeve 4, the limiting ring 11 can effectively control the overturning angle of the cover 6, so as to ensure that the cover 6 and the sleeve 4 can form a tight clamping after the clamping is completed, so as to avoid that the cover 6 is excessively extruded and damaged or the sealing performance between the cover 6 and the sleeve 4 after clamping is reduced.

[0025] Further, the inside of the groove is provided with an annular bottom ring 12, the bottom ring 12 is located on the inner side of the sealing gasket 5, the bottom ring 12 and the sealing gasket 5 are both made of rubber material, the bottom ring 12 is fixed in the inside of the groove, and the bottom ring 12 and the sealing gasket 5 are extruded with each other, so as to improve the sealing performance between the sealing gasket 5 and the bottom ring 12 when the sleeve 4 rotates.

[0026] In the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

Claims

1. A waterproof combination self-tapping screw, characterized in that, The device includes a head and a threaded portion, with a baffle plate between the head and the threaded portion. One end of the head connected to the baffle plate has an annular groove. It also includes a sleeve with openings at both ends. One end of the sleeve has an annular sealing gasket located inside the groove, allowing the sleeve to rotate within the groove. A cap is connected to the outer surface of the sleeve, engaging with the other end of the sleeve. An oil reservoir is located on the outer surface of the sleeve, communicating with the sleeve, and storing rust-preventive oil inside.

2. The waterproof combination self-tapping screw according to claim 1, characterized in that, The outer surface of the sleeve is provided with a first annular protrusion, and the inner surface of the cover is provided with a second annular protrusion. When the cover is snapped onto the sleeve, the second annular protrusion is located between the first annular protrusion and the baffle, and the first annular protrusion and the second annular protrusion are pressed and contacted with each other.

3. The waterproof combination self-tapping screw according to claim 2, characterized in that, The oil reservoir has a pressing area, which is located on two sides of the oil reservoir. When the threaded portion is perpendicular to the workpiece surface, both sides of the pressing area are also perpendicular to the workpiece surface.

4. The waterproof combination self-tapping screw according to claim 2, characterized in that, The cap is provided with a limiting ring inside. After the cap is engaged with the sleeve, the first annular protrusion is located between the second annular protrusion and the limiting ring, and the limiting ring abuts against one end of the sleeve.

5. The waterproof combination self-tapping screw according to claim 1, characterized in that, The groove has an annular bottom ring inside, which is located inside the sealing gasket. Both the bottom ring and the sealing gasket are made of rubber.

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