Rust-proof wear-resistant screw structure

Abstract

The utility model discloses a rust-proof wear-resistant screw structure which comprises a screw head, a screw rod, a hexagonal groove, an oil injection hole, an oil storage chamber, an oil outlet channel, an oil outlet chamber, an oil outlet groove, an oil outlet hole, an oil guide groove, a circular sealing groove and a sealing assembly. An oil injection hole is formed in the screw head, the upper end of the oil injection hole is communicated with the hexagonal groove, an oil storage cavity is formed in the center of the interior of the screw head, the lower end of the oil injection hole is communicated with the oil storage cavity, the lower end of the oil storage cavity is communicated with an oil outlet channel, and the lower end of the oil outlet channel extends into the screw rod. According to the screw, the speed that lubricating oil flows out can be reduced, then the situation that the lubricating oil becomes dry in a short time is avoided, and meanwhile the sealing cover can be firmly fixed to the screw head.

Description

Technical Field

[0001] The utility model relates to the technical field of fasteners, in particular to the technical field of an anti-rust and wear-resistant screw structure. Background Art

[0002] A screw is a tool that uses the physical and mathematical principles of the inclined plane circle rotation and friction of an object to gradually fasten machine parts. Screws are indispensable industrial necessities in daily life: such as extremely small screws used in cameras, glasses, watches, electronics, etc.; general screws for televisions, electrical products, musical instruments, furniture, etc.; for engineering, construction, and bridges, large screws and nuts are used; for transportation tools, airplanes, trams, cars, etc., both large and small screws are used. Screws play an important role in industry. As long as there is industry on the earth, the function of screws will always be important. Screws are the common inventions of people in production and life for thousands of years. Judging from the application fields, it is the first great invention of mankind.

[0003] However, when the screws of the prior art are in use, the connection strength between the head and the screw rod part is not high and is prone to breakage, resulting in screw damage; and one end of the screw rod part of the screws of the prior art is connected to the head, and the other end is threaded. And because one end of the screw rod with threads is generally arranged outside and is not protected, it is easy to wear.

[0004] To solve the problems raised in the background art, for example, the patent application No. CN201420686371.5 discloses a high-strength screw, including a head and a screw rod, characterized in that: a reinforcing block is provided at the connection between the head and the screw rod, and an alloy reinforcing layer is coated on the outer layer of the screw rod. The head, the screw rod and the reinforcing block are all made of high-strength steel materials. The high-strength screw adopted by the utility model has a reinforcing block at the connection between its head and the screw rod, so that the screw is not easily twisted off under the condition of receiving huge external forces. Moreover, because an alloy reinforcing layer is coated on the outer layer of the screw rod, the outer layer of the screw rod is not easily worn, greatly extending the service life of the screw. However, this structure still has the following defects:

[0005] Although this structure improves the overall strength by adding a reinforcing block and at the same time coats an alloy reinforcing layer on the outer layer of the screw rod, making the screw rod not easily worn, the rust prevention effect of the alloy reinforcing layer coated on the outer layer of the screw rod is not ideal and cannot fully protect the screw rod. Once the screw rusts, the fastening effect will decrease.

[0006] To solve the problems raised in the above technologies, for example, Patent Application No. CN201920661313.X discloses an anti-rust and wear-resistant internal hexagonal round head machine screw, including a screw head. At a position close to the center on the outer wall of the bottom of the screw head, there is a threaded rod. Near the center position inside the threaded rod, there is an oil storage groove, and the opening direction of the oil storage groove is upward. A plurality of oil leakage holes are opened on the circumferential inner wall of the oil storage groove. This anti-rust and wear-resistant internal hexagonal round head machine screw, through the mutual cooperation of the circular hole, the oil storage groove and the oil leakage holes, can enhance the lubrication and wear resistance of the threaded rod and prevent the threaded rod from rusting. However, this structure still has the following defects:

[0007] 1. Although the lubricating oil is poured into the oil storage groove in this structure, and the lubricating oil flows out through the oil leakage holes, there is a lack of a blocking structure in the oil leakage holes, so that the speed of the lubricating oil flowing out is relatively fast, which leads to the lubricating oil being easily dried up in a short time, thus reducing the anti-rust effect;

[0008] 2. At the same time, the connecting cover is prone to falling off due to external environmental factors, and then the external rainwater enters the oil storage groove, thus reducing the anti-rust effect of the screw. Summary of the Invention

[0009] The purpose of the present utility model is to solve the problems in the prior art, and propose an anti-rust and wear-resistant screw structure, which can slow down the speed of the lubricating oil flowing out, and thus avoid the situation that the lubricating oil dries up in a short time. At the same time, the sealing cover can be firmly fixed on the screw head.

[0010] To achieve the above purpose, the present utility model proposes an anti-rust and wear-resistant screw structure, including a screw head, a screw rod, a hexagonal groove, an oil injection hole, an oil storage chamber, an oil outlet channel, an oil outlet chamber, an oil outlet groove, an oil outlet hole, an oil guiding groove, a circular sealing groove, and a sealing component. The screw rod is fixedly connected below the screw head. In the middle of the upper part of the screw head, there is a hexagonal groove. Inside the screw head, there is an oil injection hole, and the upper end of the oil injection hole communicates with the hexagonal groove. At the central position inside the screw head, there is an oil storage chamber, and the lower end of the oil injection hole communicates with the oil storage chamber. The lower end of the oil storage chamber is communicated with an oil outlet channel, and the lower end of the oil outlet channel extends into the screw rod. Above the screw rod, there is an oil outlet chamber, and the upper end of the oil outlet chamber communicates with the oil outlet channel. The lower end of the oil outlet chamber is communicated with an oil outlet groove, and the lower end of the oil outlet groove is communicated with an oil outlet hole. The oil outlet end of the oil outlet hole extends to the outer wall of the screw rod. The outer wall of the screw rod is vertically provided with an oil guiding groove, and the oil guiding groove communicates with the oil outlet hole. On the upper end face of the screw head, there is a circular sealing groove in a circular structure, and a sealing component is installed in the circular sealing groove.

[0011] Preferably, the oil outlet chamber is located at the central position above the screw rod, and the oil outlet chamber is in a funnel shape.

[0012] Preferably, there are two oil outlet holes, the two oil outlet holes are symmetrically arranged, and the oil outlet holes are all inclined downward.

[0013] Preferably, a plurality of blocking pieces are arranged up and down on the inner walls of the oil outlet holes, and the blocking pieces are evenly spaced.

[0014] Preferably, there are two oil guide grooves, the two oil guide grooves are symmetrically arranged, and the upper ends of the oil guide grooves communicate with the oil outlet ends of the oil outlet holes.

[0015] Preferably, a receiving cavity is arranged at the central position below the inside of the screw rod, and reinforcing rods are symmetrically arranged in the receiving cavity.

[0016] Preferably, holes are symmetrically arranged on the inner bottom wall of the circular sealing groove, and first magnets are arranged in both of the two holes.

[0017] Preferably, the sealing assembly includes a sealing cover, a sealing ring, fixing rods, and second magnets. A sealing ring adapted to the circular sealing groove is arranged below the sealing cover. The sealing ring is threadedly connected to the circular sealing groove. Fixing rods adapted to the holes are symmetrically arranged below the sealing ring, and second magnets attracted to the first magnets are arranged below both of the two fixing rods.

[0018] Advantages of the present utility model:

[0019] 1. Through the combined use of the oil injection hole, the oil storage chamber, the oil outlet channel, the oil outlet chamber, the oil outlet groove, the oil outlet hole, the oil guide groove, and the blocking piece, the present utility model can enhance the lubrication and wear resistance of the threaded rod, prevent the threaded rod from rusting. After the lubricating oil is injected into the oil storage chamber through the oil injection hole, the lubricating oil then flows into the oil outlet channel and then into the oil outlet chamber from the oil outlet channel. Since the oil outlet chamber is in a funnel shape, the lubricating oil can slowly flow into the oil outlet groove, and then flow into the oil outlet holes on both sides from the oil outlet groove. Since there are a plurality of blocking pieces in the oil outlet holes, the flow rate of the lubricating oil is further slowed down, and the lubricating effect can be maintained during long-term use. Finally, it flows into the gap between the bolt rod and the workpiece from the oil guide groove, so that the screw can always maintain the effects of lubrication and wear resistance during long-term use, thus solving the problem that the outflow speed of the lubricating oil is relatively fast, which easily causes the lubricating oil to dry out in a short time, thereby reducing the rust prevention effect;

[0020] 2. By the combined use of the sealing cover, sealing ring, fixing rod, second magnet, and first magnet, the sealing cover can be firmly fixed on the screw head. First, thread the sealing ring on the sealing cover tightly into the circular sealing groove. When tightened to a certain extent, align the fixing rod with the hole and press the sealing cover downward forcefully, so that the second magnet on the fixing rod attracts the first magnet in the hole, thereby further improving the firmness of the sealing cover, making the sealing cover not easy to fall off, protecting the oil injection hole from water ingress, increasing the rust prevention effect of the screw, and solving the problem that the connection cover is likely to fall off due to external environmental factors, and then allowing external rainwater to enter the oil storage tank, thus reducing the rust prevention effect of the screw. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is the front view of an anti-rust and wear-resistant screw structure of the present utility model;

[0022] Figure 2 is the sectional view of an anti-rust and wear-resistant screw structure of the present utility model;

[0023] Figure 3 is the enlarged schematic view of the oil outlet hole of an anti-rust and wear-resistant screw structure of the present utility model;

[0024] Figure 4 is the schematic view of the sealing assembly of an anti-rust and wear-resistant screw structure of the present utility model;

[0025] In the figure: 1 - screw head, 2 - screw rod, 3 - hexagonal groove, 4 - oil injection hole, 5 - oil storage chamber, 6 - oil outlet channel, 7 - oil outlet chamber, 8 - oil outlet groove, 9 - oil outlet hole, 91 - blocking piece, 10 - oil guiding groove, 11 - circular sealing groove, 111 - hole, 112 - first magnet, 12 - sealing assembly, 122 - sealing cover, 123 - sealing ring, 124 - fixing rod, 125 - second magnet, 13 - accommodating cavity, 133 - reinforcing rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] Refer to Figures 1 to 4, a rust-proof and wear-resistant screw structure of the present utility model, comprising a screw head 1, a screw rod 2, a hexagonal groove 3, an oil injection hole 4, an oil storage chamber 5, an oil outlet channel 6, an oil outlet chamber 7, an oil outlet groove 8, an oil outlet hole 9, an oil guiding groove 10, a circular sealing groove 11, and a sealing assembly 12. A screw rod 2 is fixedly connected below the screw head 1. A hexagonal groove 3 is formed in the middle of the upper part of the screw head 1. An oil injection hole 4 is arranged inside the screw head 1. The upper end of the oil injection hole 4 communicates with the hexagonal groove 3. An oil storage chamber 5 is arranged at the central position inside the screw head 1. The lower end of the oil injection hole 4 communicates with the oil storage chamber 5. The lower end of the oil storage chamber 5 is connected with an oil outlet channel 6. The lower end of the oil outlet channel 6 extends into the inside of the screw rod 2. An oil outlet chamber 7 is arranged above the inside of the screw rod 2. The upper end of the oil outlet chamber 7 communicates with the oil outlet channel 6. The lower end of the oil outlet chamber 7 is connected with an oil outlet groove 8. The lower end of the oil outlet groove 8 is connected with an oil outlet hole 9. The oil outlet end of the oil outlet hole 9 extends to the outer wall of the screw rod 2. An oil guiding groove 10 is vertically arranged on the outer wall of the screw rod 2. The oil guiding groove 10 communicates with the oil outlet hole 9. A circular sealing groove 11 in a circular structure is formed on the upper end surface of the screw head 1. A sealing assembly 12 is installed in the circular sealing groove 11.

[0027] Refer to Figure 2 , a rust-proof and wear-resistant screw structure of the present utility model, the oil outlet chamber 7 is located at the central position above the inside of the screw rod 2, and the oil outlet chamber 7 is in a funnel shape. Due to the funnel shape of the oil outlet chamber 7, the lubricating oil can slowly flow into the oil outlet groove 8.

[0028] Refer to Figure 2 and Figure 3 , a rust-proof and wear-resistant screw structure of the present utility model, the number of the oil outlet holes 9 is two. The two oil outlet holes 9 are symmetrically arranged, and the oil outlet holes 9 are both inclined downward. A plurality of blocking pieces 91 are arranged up and down on the inner walls of the oil outlet holes 9. The blocking pieces 91 are equidistantly distributed. By arranging a plurality of blocking pieces 91, the flowing speed of the lubricating oil is further slowed down, and the lubricating effect can be maintained during long-term use.

[0029] Refer to Figure 2 , a rust-proof and wear-resistant screw structure of the present utility model, the number of the oil guiding grooves 10 is two. The two oil guiding grooves 10 are symmetrically arranged, and the upper ends of the oil guiding grooves 10 communicate with the oil outlet ends of the oil outlet holes 9.

[0030] Refer to Figure 2 , a rust-proof and wear-resistant screw structure of the present utility model, a receiving cavity 13 is arranged at the central position below the inside of the screw rod 2. Reinforcing rods 133 are symmetrically arranged in the receiving cavity 13. By arranging the reinforcing rods 133, the strength of the screw rod 2 can be improved, so that the screw rod 2 is not easily broken during use.

[0031] Refer to Figure 2 and Figure 4 For a rust-proof and wear-resistant screw structure of the present utility model, holes 111 are symmetrically arranged on the inner bottom wall of the circular sealing groove 11. First magnets 112 are arranged in both of the two holes 111. The sealing assembly 12 includes a sealing cover 122, a sealing ring 123, a fixing rod 124, and a second magnet 125. A sealing ring 123 adapted to the circular sealing groove 11 is arranged below the sealing cover 122. The sealing ring 123 is in threaded connection with the circular sealing groove 11. Fixing rods 124 adapted to the holes 111 are symmetrically arranged below the sealing ring 123. Second magnets 125 attracted to the first magnets 112 are arranged below both of the two fixing rods 124. The sealing ring 123 on the sealing cover 122 is screwed tightly into the circular sealing groove 11. When tightened to a certain extent, the fixing rods 124 are aligned with the holes 111, and the sealing cover 122 is pressed downward forcefully, so that the second magnets 125 on the fixing rods 124 are attracted to the first magnets 112 in the holes 111, thereby further improving the firmness of the sealing cover 122, making the sealing cover 122 not easily fall off, protecting the oil injection hole 4 from not easily getting water, and thus increasing the rust-proof effect of the screw.

[0032] Working process of the present utility model:

[0033] During the working process of a rust-proof and wear-resistant screw structure of the present utility model, first, lubricating oil is injected into the oil storage chamber 5 from the oil injection hole 4. Subsequently, the lubricating oil flows into the oil outlet passage 6 and then flows into the oil outlet chamber 7 from the oil outlet passage 6. Since the oil outlet chamber 7 is in a funnel shape, the lubricating oil can slowly flow into the oil outlet groove 8, and then flows into the oil outlet holes 9 on both sides from the oil outlet groove 8. Since a plurality of blocking pieces 91 are arranged in the oil outlet holes 9, the flowing speed of the lubricating oil is further slowed down, and the lubricating effect can be maintained during long-term use. Finally, it flows into the gap between the bolt rod 2 and the workpiece from the oil guiding groove 10, so that the screw can always maintain the lubricating and wear-resistant effects during long-term use. Finally, the sealing ring 123 on the sealing cover 122 is screwed tightly into the circular sealing groove 11. When tightened to a certain extent, the fixing rods 124 are aligned with the holes 111, and the sealing cover 122 is pressed downward forcefully, so that the second magnets 125 on the fixing rods 124 are attracted to the first magnets 112 in the holes 111, thereby further improving the firmness of the sealing cover 122, making the sealing cover 122 not easily fall off, protecting the oil injection hole 4 from not easily getting water, and thus increasing the rust-proof effect of the screw.

[0034] The above embodiments are illustrative of the present utility model, not restrictive thereof. Any solution obtained by simply transforming the present utility model belongs to the protection scope of the present utility model.

Claims

1. A rust-proof and wear-resistant screw structure, characterized in that: The invention comprises a screw head (1), a screw rod (2), a hexagonal groove (3), an oil filling hole (4), an oil storage chamber (5), an oil outlet passage (6), an oil outlet chamber (7), an oil outlet groove (8), an oil outlet hole (9), an oil guide groove (10), a circular sealing groove (11), and a sealing assembly (12). The screw head (1) is fixedly connected to the screw rod (2) at the bottom, the hexagonal groove (3) is provided at the top middle part of the screw head (1), an oil filling hole (4) is provided inside the screw head (1), the upper end of the oil filling hole (4) is communicated with the hexagonal groove (3), an oil storage chamber (5) is provided at the center position inside the screw head (1), the lower end of the oil filling hole (4) is communicated with the oil storage chamber (5), and the lower end of the oil storage chamber (5) is connected to the An oil outlet passage (6) is provided, the lower end of the oil outlet passage (6) extending to the interior of the screw rod (2), an oil outlet chamber (7) is arranged above the interior of the screw rod (2), the upper end of the oil outlet chamber (7) communicating with the oil outlet passage (6), the lower end of the oil outlet chamber (7) communicating with an oil outlet groove (8), the lower end of the oil outlet groove (8) communicating with an oil outlet hole (9), the oil outlet end of the oil outlet hole (9) extending to the outer wall of the screw rod (2), an oil guide groove (10) vertically arranged on the outer wall of the screw rod (2), the oil guide groove (10) communicating with the oil outlet hole (9), the upper end surface of the screw head (1) is provided with a circular sealing groove (11) in a circular structure, a sealing assembly (12) being installed in the circular sealing groove (11).

2. The rust-proof and wear-resistant screw structure according to claim 1, characterized in that: The oil outlet chamber (7) is located at the upper center position inside the screw rod (2), and the oil outlet chamber (7) is in the shape of a funnel.

3. The rust-proof and wear-resistant screw structure according to claim 1, characterized in that: There are two oil outlet holes (9), the two oil outlet holes (9) are symmetrically arranged, and both of the oil outlet holes (9) are distributed in a downwardly inclined manner.

4. The rust-proof and wear-resistant screw structure according to claim 1, characterized in that: The inner wall of the oil outlet hole (9) is provided with a plurality of blocking sheets (91) at upper and lower positions, and the blocking sheets (91) are distributed at equal intervals.

5. The rust-proof and wear-resistant screw structure according to claim 1, characterized in that: There are two oil guide grooves (10), which are symmetrically arranged, and the upper ends of the oil guide grooves (10) are both in communication with the oil outlet end of the oil outlet hole (9).

6. The rust-proof and wear-resistant screw structure according to claim 1, characterized in that: A receiving cavity (13) is provided at a central position at the lower interior of the screw rod (2), and reinforcing rods (133) are symmetrically arranged in the receiving cavity (13).

7. The rust-proof and wear-resistant screw structure according to claim 1, characterized in that: The inner bottom wall of the circular sealing groove (11) is symmetrically provided with holes (111), and a first magnet (112) is provided in each of the two holes (111).

8. The rust-proof and wear-resistant screw structure according to claim 7, characterized in that: The sealing assembly (12) comprises a sealing cover (122), a sealing ring (123), a fixing rod (124), and a second magnet (125); a sealing ring (123) adapted to the circular sealing groove (11) is arranged below the sealing cover (122); the sealing ring (123) is threadedly connected to the circular sealing groove (11); fixing rods (124) adapted to the hole (111) are symmetrically arranged below the sealing ring (123); and second magnets (125) attracted to the first magnet (112) are arranged below the two fixing rods (124).

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