Anti-theft screw structure

Abstract

The anti-theft screw structure comprises a screw head, a screw rod, an anti-theft cap, an anti-theft assembly, an insertion rod, a left clamping block, a right clamping block, a square groove, a through hole, a transverse hole and a clamping assembly, the lower portion of the screw head is fixedly connected with the screw rod, the anti-theft cap is arranged on the upper portion of the screw head, the anti-theft assembly is arranged on the lower portion of the interior of the anti-theft cap, and the insertion rod is fixedly connected with the insertion rod. The anti-theft assembly comprises an inserting rod, a left clamping block and a right clamping block, the inserting rod is vertically arranged on the lower portion in the anti-theft cap, the left clamping block and the right clamping block are arranged on the left side and the right side of the bottommost end of the inserting rod respectively, a square groove is formed in the middle of the upper portion of the screw head, and a through hole is vertically formed in the screw head. According to the anti-theft screw, the anti-theft cap can be firmly clamped into the screw head, so that the anti-theft cap blocks the square groove, and then the screw is not prone to being taken out.

Description

Technical Field

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

[0002] Screws are one of the most common fasteners in the machinery industry and are often used in industries such as construction, heavy industry, and chemical industry.

[0003] When assembling the screws of the prior art, workers need to hold the screw head by hand and then use tools to tighten the nut with the screw. However, when the screws of the prior art are in use, the connection strength between the head and the screw part is not high and is easily broken, resulting in screw damage; and one end of the screw part of the screws of the prior art is connected to the head, and the other end is threaded. And because the threaded end of the screw is generally arranged outside and is not protected, it is easily worn.

[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. The characteristics are as follows: a reinforcement block is provided at the connection between the head and the screw, and an alloy strengthening layer is coated on the outer layer of the screw. The head, the screw, and the reinforcement block are all made of high-strength steel materials. The alloy strengthening layer coated on the outer layer of the screw is manganese alloy or molybdenum alloy. The utility model is provided with a reinforcement block at the connection between its head and the screw, so that the screw is not easily twisted off under the condition of receiving huge external forces. Moreover, because an alloy strengthening layer is coated on the outer layer of the screw, the outer layer of the screw is not easily worn, greatly prolonging the service life of the screw. However, this structure still has the following defects:

[0005] Although this structure is provided with a reinforcement block at the connection between the head and the screw, so that the screw is not easily twisted off under the condition of receiving huge external forces, this screw lacks an anti-theft structure, resulting in the screw being easily unscrewed by thieves, thereby stealing special objects and causing economic losses.

[0006] In order to solve the problems raised in the above-mentioned technology, for example, application number CN201920176608.8 discloses an anti-theft screw, including a nut and a screw connected in one piece, the nut including a hemispherical round head and a hexagonal head located at the upper end of the round head, the upper end of the round head is provided with a connecting column protruding upward, the lower end of the hexagonal head extends with a connecting sleeve nested with the connecting column, the circumferential surface of the connecting column is provided with a plurality of protrusions extending along its length direction, and the inner wall of the connecting sleeve is provided with grooves corresponding to the protrusions one by one. The nut composed of a hemispherical round head and a hexagonal head can effectively avoid the safety hazards caused by the easy disassembly of the screw, and the structure is simple and the anti-theft is reliable. Through the cooperation of the protrusion and the positioning column, a special structural form can be formed, and a connecting sleeve with a specific shape and matching it can drive the screw to rotate, thereby making the anti-theft of the screw more reliable, but the structure still has the following defects:

[0007] Although the screw adopts a nut composed of a hemispherical round head and a hexagonal head, which can protect the screw from being difficult to be disassembled to a certain extent, when the thief uses a tool to knock and lift the nut with force, the nut is still easy to fall out, resulting in an unsatisfactory anti-theft effect. Summary of the invention

[0008] The purpose of the utility model is to solve the problems in the prior art and to provide an anti-theft screw structure, which can firmly clamp an anti-theft cap onto the screw head so that the anti-theft cap blocks the square groove, thereby making the screw difficult to be taken out.

[0009] To achieve the above-mentioned purpose, the utility model proposes an anti-theft screw structure, comprising a screw head, a screw rod, an anti-theft cap, an anti-theft component, an insertion rod, a left clamping block, a right clamping block, a square groove, a through hole, a transverse hole, and a clamping component, wherein the screw rod is fixedly connected to the bottom of the screw head, an anti-theft cap is arranged above the screw head, and an anti-theft component is arranged at the lower part of the inner part of the anti-theft cap, and the anti-theft component comprises an insertion rod, a left clamping block and a right clamping block, the insertion rod is vertically arranged at the inner lower part of the anti-theft cap, and the left and right clamping blocks are respectively arranged on the left and right sides of the bottom end of the insertion rod, a square groove is opened at the upper middle part of the screw head, a through hole is vertically arranged inside the screw head, the through hole is located below the square groove, and the through hole is communicated with the square groove, transverse holes are symmetrically arranged on both sides of the interior of the screw head, the transverse holes are located on both sides of the through hole, and the transverse holes are communicated with the through hole, and clamping components used in conjunction with the anti-theft component are arranged in the transverse holes.

[0010] Preferably, the edges of the left clamping block and the right clamping block are both tilted upwards, and the outer side walls of the left clamping block and the right clamping block are both inclined.

[0011] Preferably, the clamping component includes a spring and a clamping block. One end of the spring is connected to the inner side wall of the transverse hole, and the other end of the spring is connected to the rear end face of the clamping block. The front end face of the clamping block is of an inclined surface structure, and the inclined surface of the front end face of the clamping block is adapted to the inclined surfaces of the outer side walls of the left clamping block and the right clamping block.

[0012] Preferably, a clamping groove is formed in the lower end face of the clamping block, and the clamping groove is adapted to the upwardly warped portions of the left clamping block and the right clamping block.

[0013] Preferably, a steel gasket is installed at the connection between the screw head and the screw rod.

[0014] Preferably, a sealing gasket is installed outside the screw rod, and the sealing gasket is located below the steel gasket.

[0015] Advantages of the present utility model:

[0016] 1. By the combined use of the anti-theft component and the clamping component, the anti-theft performance of the screw can be greatly improved. First, align the insertion rod on the anti-theft cap with the through hole, and then insert the insertion rod into the through hole below the square groove, while driving the left clamping block and the right clamping block on both sides into the through hole. During the downward movement of the left clamping block and the right clamping block, the inclined surfaces of the outer side walls will contact the inclined surface of the front end face of the clamping block, thereby driving the spring at the rear end face of the clamping block to contract inwardly under force, and then driving the clamping block to move inward until the left clamping block and the right clamping block are inserted into the inner bottom wall of the through hole. Subsequently, the spring resets to drive the clamping block to move forward, and at the same time, the front end face of the clamping block extends forward under the elasticity of the spring, so that the upwardly warped portions of the left clamping block and the right clamping block are caught in the clamping groove below the clamping block, thus firmly pressing the left clamping block and the right clamping block against the clamping block, making it impossible for thieves to pry open the anti-theft cap with any tool, thereby greatly improving the anti-theft performance. At the same time, the anti-theft cap is made of carbon steel, and carbon steel has a relatively high strength and can be used to withstand greater loads and forces, thus solving the problem that the nut is still prone to come off when thieves use tools to knock and forcefully pry up the nut.

[0017] 2. By providing the steel gasket and the sealing gasket, the steel gasket can improve the stability to a certain extent when the screw is tightened, and the sealing gasket can make the screw fit tightly on the surface of the connected object when tightened, thereby preventing impurities such as rainwater and dust from corroding the thread part of the screw by contacting through the gap. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the front view of a theft-proof screw structure of the present utility model;

[0019] Figure 2 is the schematic diagram of the anti-theft component of a theft-proof screw structure of the present utility model;

[0020] Figure 3 It is a schematic diagram of the clamping component of an anti-theft screw structure of the present utility model;

[0021] Figure 4 It is a plan view of the cross-section of the screw head of an anti-theft screw structure of the present utility model;

[0022] Figure 5 It is a three-dimensional view of the cross-section of the screw head of an anti-theft screw structure of the present utility model;

[0023] In the figure: 1 - screw head, 2 - screw rod, 3 - anti-theft cap, 4 - anti-theft component, 41 - insertion rod, 42 - left clamping block, 43 - right clamping block, 5 - square groove, 6 - through hole, 7 - transverse hole, 8 - clamping component, 81 - spring, 82 - clamping block, 822 - clamping groove, 9 - steel gasket, 10 - sealing gasket. Specific embodiments

[0024] Refer to Figures 1 to 5 For an anti-theft screw structure of the present utility model, it includes a screw head 1, a screw rod 2, an anti-theft cap 3, an anti-theft component 4, an insertion rod 41, a left clamping block 42, a right clamping block 43, a square groove 5, a through hole 6, a transverse hole 7, and a clamping component 8. The screw rod 2 is fixedly connected below the screw head 1. An anti-theft cap 3 is arranged above the screw head 1. An anti-theft component 4 is arranged below the interior of the anti-theft cap 3. The anti-theft component 4 includes an insertion rod 41, a left clamping block 42, and a right clamping block 43. The insertion rod 41 is vertically arranged at the lower inner part of the anti-theft cap 3. The left clamping block 42 and the right clamping block 43 are respectively arranged on the left and right sides at the bottom end of the insertion rod 41. A square groove 5 is opened in the middle above the screw head 1. A through hole 6 is vertically arranged inside the screw head 1. The through hole 6 is located below the square groove 5 and is communicated with the square groove 5. Transverse holes 7 are symmetrically arranged on both sides inside the screw head 1. The transverse holes 7 are located on both sides of the through hole 6 and are communicated with the through hole 6. Clamping components 8 that are used in cooperation with the anti-theft component 4 are arranged in the transverse holes 7. In this application, the anti-theft cap 3 is made of carbon steel. Carbon steel has relatively high strength and can be used to bear larger loads and forces, thereby preventing thieves from prying open the anti-theft cap 3 by knocking. At the same time, the anti-theft cap 3 not only plays a role in anti-theft, but also can prevent rainwater from entering the square groove 5, thus avoiding the problem of inconvenient disassembly caused by rusting of the square groove 5.

[0025] Refer to Figure 2 For an anti-theft screw structure of the present utility model, the edges of the left clamping block 42 and the right clamping block 43 are both upwardly warped, and the outer side walls of the left clamping block 42 and the right clamping block 43 are both of inclined surface structures.

[0026] Refer to Figure 3The utility model provides an anti-theft screw structure, the clamping assembly 8 includes a spring 81 and a clamping block 82, one end of the spring 81 is connected to the inner side wall of the transverse hole 7, and the other end of the spring 81 is connected to the rear end face of the clamping block 82, and the front end face of the clamping block 82 is an inclined structure, and the inclined surface of the front end face of the clamping block 82 is adapted to the inclined surfaces of the outer side walls of the left clamping block 42 and the right clamping block 43. When the left clamping block 42 and the right clamping block 43 are in the process of descending, the inclined surface of the outer side wall will contact the inclined surface of the front end face of the clamping block 82, thereby driving the rear end face spring 81 of the clamping block 82 to be forced to contract inwardly, and then driving the clamping block 82 to move inwardly until the left clamping block 42 and the right clamping block 43 are inserted into the inner bottom wall of the through hole 6, and then the spring 81 is reset to drive the clamping block 82 to move forward.

[0027] See also Figure 3 , Figure 4 and Figure 5 The utility model provides an anti-theft screw structure, and a clamping groove 822 is provided on the lower end surface of the clamping block 82. The clamping groove 822 is adapted to the upper raised portion of the left clamping block 42 and the right clamping block 43. By providing the clamping groove 822, the left clamping block 42 and the right clamping block 43 can be firmly pressed against the clamping block 82.

[0028] See also Figure 1 The utility model discloses an anti-theft screw structure, wherein a steel gasket 9 is installed at the connection between the screw head 1 and the screw rod 2, and a sealing gasket 10 is installed on the outside of the screw rod 2. The sealing gasket 10 is located below the steel gasket 9. The steel gasket 9 can improve the partial stability when the screw is tightened, and the sealing gasket 10 can make the screw fit tightly to the surface of the connected object when it is tightened, thereby preventing impurities such as rainwater and dust from corroding the threaded part of the screw due to contacting the threaded part through the gap.

[0029] Working process of this utility model:

[0030] During the working process of this novel anti-theft screw structure, first, align the insertion rod 41 on the anti-theft cap 3 with the through hole 6, then insert the insertion rod 41 into the through hole 6 below the square groove 5, and at the same time drive the left clamping block 42 and the right clamping block 43 on both sides into the through hole 6. During the descending process of the left clamping block 42 and the right clamping block 43, the inclined surfaces on the outer sidewalls will come into contact with the inclined surface on the front end face of the clamping block 82, thereby driving the spring 81 on the rear end face of the clamping block 82 to contract inwardly, and further driving the clamping block 82 to move inwardly until the left clamping block 42 and the right clamping block 43 are inserted into the inner bottom wall of the through hole 6. Subsequently, the spring 41 resets to drive the clamping block 82 to move forward, and at the same time, the front end face of the clamping block 82 extends forward under the elasticity of the spring 41, so that the upturned parts above the left clamping block 42 and the right clamping block 43 are caught in the clamping groove 822 below the clamping block 82, thereby firmly pressing the left clamping block 42 and the right clamping block 43 against the clamping block 82, making it impossible for thieves to pry open the anti-theft cap with any tool, and thus greatly improving the anti-theft performance.

[0031] By providing the steel gasket 9 and the sealing gasket 10, the steel gasket 9 can improve the stability to a certain extent when the screw is tightened, and the sealing gasket 10 can make the screw fit tightly on the surface of the connected object when tightened, thereby preventing impurities such as rainwater and dust from corroding this part by contacting the threaded part of this screw through the gap.

[0032] The above embodiments are illustrative of the present invention and not restrictive thereof. Any simply transformed scheme of the present invention belongs to the protection scope of the present invention.

Claims

1. An anti-theft screw structure, characterized in that: The invention comprises a screw head (1), a screw rod (2), an anti-theft cap (3), an anti-theft component (4), an insertion rod (41), a left clamping block (42), a right clamping block (43), a square groove (5), a through hole (6), a transverse hole (7), and a clamping component (8); the screw rod (2) is fixedly connected to the bottom of the screw head (1); the anti-theft cap (3) is arranged above the screw head (1); the anti-theft component (4) is arranged at the bottom of the anti-theft cap (3); the anti-theft component (4) comprises an insertion rod (41), a left clamping block (42), and a right clamping block (43); the insertion rod (41) is vertically arranged at the bottom of the anti-theft cap (3); A left clamping block (42) and a right clamping block (43) are respectively arranged on the left and right sides of the bottom end of the insertion rod (41); a square slot (5) is provided in the middle of the upper part of the screw head (1); a through hole (6) is vertically arranged inside the screw head (1); the through hole (6) is located below the square slot (5), and the through hole (6) is communicated with the square slot (5); transverse holes (7) are symmetrically arranged on both sides of the interior of the screw head (1); the transverse holes (7) are located on both sides of the through hole (6), and the transverse holes (7) are communicated with the through hole (6); and a clamping component (8) used in conjunction with the anti-theft component (4) is arranged in each of the transverse holes (7).

2. The anti-theft screw structure according to claim 1, characterized in that: The edges of the left clamping block (42) and the right clamping block (43) are both arranged to be tilted upwards, and the outer side walls of the left clamping block (42) and the right clamping block (43) are both inclined structures.

3. The anti-theft screw structure according to claim 1, characterized in that: The clamping assembly (8) comprises a spring (81) and a clamping block (82), one end of the spring (81) being connected to the inner wall of the transverse hole (7), and the other end of the spring (81) being connected to the rear end face of the clamping block (82), the front end face of the clamping block (82) being an inclined surface structure, and the inclined surface of the front end face of the clamping block (82) being adapted to the inclined surfaces of the outer walls of the left clamping block (42) and the right clamping block (43).

4. The anti-theft screw structure according to claim 3, characterized in that: A clamping groove (822) is provided on the lower end surface of the clamping block (82), and the clamping groove (822) is adapted to the upper raised portions of the left clamping block (42) and the right clamping block (43).

5. The anti-theft screw structure according to claim 1, characterized in that: A steel gasket (9) is installed at the connection between the screw head (1) and the screw rod (2).

6. The anti-theft screw structure according to claim 5, characterized in that: A sealing gasket (10) is installed on the outside of the screw rod (2), and the sealing gasket (10) is located below the steel gasket (9).

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