High strength fastener screw

Abstract

The utility model discloses a high -strength fastening screw relates to screw technical field, including the stud, one end of the stud is fixedly connected with hex head, the surface of the stud is equipped with fastening screw thread, the one side of hex head is equipped with first hex recess. The utility model design scheme is through adopting the cooperation of circular platform wedge, screw rod, cylindrical head and limit piece, and when reinforcing, the small size of internal hexagon is inserted into the inside of second hex recess, then the cylindrical head and screw rod are rotated clockwise and pull circular platform wedge, and when driving circular platform wedge to slide to the direction of approaching cylindrical head, the bottom end of stud is opened, makes it closely attached on screw hole inner wall, thereby realizes the expansion reinforcement. The limit protruding piece sets up in the end of stud is in order to prevent circular platform wedge from sliding out the inside of cross slide groove, sets up anti -twist protruding piece and is used for limiting circular platform wedge and follows screw rod synchronous rotation, and the simple structure of this application has improved the fastening effect of screw.

Description

Technical Field

[0001] This utility model relates to the field of screw technology, and in particular to a high-strength fastening screw. Background Technology

[0002] A screw is a tool that uses the physical and mathematical principles of inclined planes, circular rotation, and friction to gradually tighten objects and machine parts. "Screw" is a general term for fasteners and is commonly used in everyday speech. Screws are indispensable industrial necessities in daily life: tiny screws are used in cameras, eyeglasses, watches, and electronics; general screws are used in televisions, electrical appliances, musical instruments, and furniture; large screws and nuts are used in engineering, construction, and bridges; and various sizes of screws are used in transportation equipment, airplanes, trams, and automobiles. Screws play a vital role in industry, and as long as industry exists on Earth, the function of screws will always be important.

[0003] Existing fastening screws can cause nuts to loosen due to machine vibrations during use, thus affecting the screw's tightness over parts. Therefore, a new technical solution needs to be designed to address this issue. Utility Model Content

[0004] In order to overcome the above-mentioned defects in the prior art, the present invention provides a high-strength fastening screw.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a high-strength fastening screw, including a stud, one end of which is fixedly connected to a hexagonal head, the surface of which is provided with fastening threads, and one side of which is provided with a first hexagonal groove. An expansion anti-loosening mechanism is provided inside the stud and the hexagonal head, and an anti-reverse mechanism is provided inside the hexagonal head.

[0006] The expansion and anti-loosening mechanism includes a frustum wedge, the surface of which is integrally formed with an anti-torsion protrusion, and the stud has a cross groove inside. The surfaces of the frustum wedge and the anti-torsion protrusion are slidably connected to the inside of the cross groove.

[0007] Furthermore, the end of the stud is integrally formed with a limiting protrusion, the end of the frustum wedge near the limiting protrusion is movably connected to the side of the limiting protrusion, and the end of the frustum wedge away from the limiting protrusion is provided with a threaded hole.

[0008] Furthermore, a screw is threadedly connected to the inside of the threaded hole, a limiting plate is fixedly connected to one end of the screw, and a cylindrical head is fixedly connected to one side of the limiting plate.

[0009] Furthermore, the surfaces of the screw, the limiting plate, and the cylindrical head are all rotatably connected to the interior of the screw and the hexagonal head, and a second hexagonal groove is provided on one side of the cylindrical head.

[0010] Furthermore, the anti-reverse mechanism includes a ratchet, the side of which is fixedly connected to one side of the cylindrical head, and a groove is formed inside the first hexagonal groove, with a rotating shaft and a fixed seat fixedly connected inside the groove.

[0011] Furthermore, a pawl is rotatably connected to the surface of the rotating shaft, and the end of the pawl is movably connected to the edge ratchet teeth of the ratchet wheel. A spring is fixedly connected to one side of the fixed seat, and the end of the spring is fixedly connected to the side of the pawl.

[0012] The beneficial effects of this utility model are that the design scheme of this utility model adopts an expansion anti-loosening mechanism, a cross slide groove, a frustum wedge, a limiting protrusion, an anti-torsion protrusion, a threaded hole, a screw, a cylindrical head, a second hexagonal groove, and a limiting piece. In use, a wrench or an Allen wrench is used to screw the stud and the hexagonal head into the screw hole, which can further reinforce the screw. A small Allen wrench is inserted into the second hexagonal groove, and then the cylindrical head and the screw are rotated clockwise to pull the frustum wedge. Since the frustum wedge and the slide groove in which it is located are both frustum shaped, and the stud is divided into four by the cross slide groove, when the frustum wedge slides towards the cylindrical head, it will open the bottom end of the stud, making it tightly fit against the inner wall of the screw hole, thereby achieving expansion reinforcement. The limiting protrusion is located at the end of the stud to prevent the frustum wedge from slipping out of the cross groove. The anti-torsion protrusion is used to limit the frustum wedge from rotating synchronously with the screw. Before removing the screw, the cylindrical head needs to be rotated counterclockwise to move the frustum wedge away and exit the expansion and reinforcement state. The limiting piece is used to provide support force. This application has a simple structure and improves the screw tightening effect. By using a ratchet, groove, shaft, fixed seat, pawl, and spring, the anti-reverse mechanism locks the screw and cylindrical head in place. When the screw is expanded and reinforced using the expansion and anti-loosening mechanism, the cylindrical head needs to be rotated clockwise. At this time, the ratchet rotates synchronously with the cylindrical head. The end of the pawl, due to the lateral push of the spring, will always be against the ratchet teeth of the ratchet to limit the reverse rotation. When removing the screw, simply move the pawl to one side to rotate the cylindrical head counterclockwise. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the structure of this utility model from another perspective; Figure 3 This is a schematic cross-sectional view of the expansion and anti-loosening mechanism of this utility model; Figure 4 This is a cross-sectional structural diagram of the present invention; Figure 5This is a schematic diagram of the structure at point A of this utility model.

[0015] In the diagram: 1. Stud; 2. Hexagonal head; 3. Fastening thread; 4. First hexagonal groove; 5. Expansion anti-loosening mechanism; 6. Cross groove; 7. Frustum wedge; 8. Limiting protrusion; 9. Anti-torsion protrusion; 10. Threaded hole; 11. Screw; 12. Cylindrical head; 13. Second hexagonal groove; 14. Limiting plate; 15. Anti-reverse mechanism; 16. Ratchet; 17. Groove; 18. Shaft; 19. Fixing base; 20. Pad; 21. Spring. Detailed Implementation

[0016] To more clearly illustrate the technical solution of this utility model, the following description is made in conjunction with the accompanying drawings. Obviously, the drawings described below are only one embodiment of this utility model. For those skilled in the art, other embodiments can be obtained based on these drawings and embodiments without creative effort, and all of them fall within the protection scope of this utility model.

[0017] Example 1 according to Figure 1-5 As shown, a high-strength fastening screw includes a stud 1, one end of which is fixedly connected to a hexagonal head 2. The surface of the stud 1 is provided with fastening threads 3. A first hexagonal groove 4 is provided on one side of the hexagonal head 2. An expansion anti-loosening mechanism 5 is provided inside the stud 1 and the hexagonal head 2. An anti-reverse mechanism 15 is also provided inside the hexagonal head 2. The expansion anti-loosening mechanism 5 includes a frustum wedge 7. An anti-torsion protrusion 9 is integrally formed on the surface of the frustum wedge 7. A cross groove 6 is provided inside the stud 1. The surfaces of the frustum wedge 7 and the anti-torsion protrusion 9 are slidably connected inside the cross groove 6. The end of the stud 1 is integrally formed with a limiting protrusion 8. The end of the frustum wedge 7 near the limiting protrusion 8 is movably connected to the side of the limiting protrusion 8. The end of the frustum wedge 7 away from the limiting protrusion 8 is provided with a threaded hole 10. The threaded hole 10 is internally threaded with a screw 11. One end of the screw 11 is fixedly connected with a limiting piece 14. One side of the limiting piece 14 is fixedly connected with a cylindrical head 12. The surfaces of the screw 11, the limiting piece 14 and the cylindrical head 12 are all rotatably connected to the inside of the stud 1 and the hexagonal head 2. A second hexagonal groove 13 is provided on one side of the cylindrical head 12.

[0018] In this embodiment, when using it, the stud 1 and the hexagonal head 2 are screwed into the screw hole with the help of a wrench or an Allen wrench. The screw can be further reinforced. A small Allen wrench is inserted into the second hexagonal groove 13. Then, the cylindrical head 12 and the screw 11 are rotated clockwise to pull the frustum wedge 7. Since the frustum wedge 7 and the groove it is in (the outside of the cross groove 6 is used to prevent the anti-torsion protrusion 9 from sliding in a cross shape, and its center is used to make the frustum wedge 7 slide in a frustum-shaped cavity) are both frustum-shaped, and the stud 1 is divided into four by the cross groove 6, when the frustum wedge 7 slides towards the cylindrical head 12, it will open the bottom end of the stud 1, so that it is tightly attached to the inner wall of the screw hole, thereby achieving expansion reinforcement. The limiting protrusion 8 is located at the end of the stud 1 to prevent the frustum wedge 7 from slipping out of the cross groove 6. The anti-torsion protrusion 9 is used to limit the frustum wedge 7 from rotating synchronously with the screw 11. Before removing the screw, the cylindrical head 12 needs to be rotated counterclockwise to move the frustum wedge 7 away, thus exiting the expanded and reinforced state. The limiting piece 14 is provided with support force at this time. This application has a simple structure and improves the screw tightening effect.

[0019] Example 2 according to Figure 1-5 As shown, based on Embodiment 1, this utility model provides a technical solution: Preferably, the anti-reverse mechanism 15 includes a ratchet 16, the side of which is fixedly connected to one side of the cylindrical head 12. A groove 17 is provided inside the first hexagonal groove 4. A rotating shaft 18 and a fixed seat 19 are fixedly connected inside the groove 17. A pawl 20 is rotatably connected to the surface of the rotating shaft 18. The end of the pawl 20 is movably connected to the edge ratchet tooth of the ratchet 16. A spring 21 is fixedly connected to one side of the fixed seat 19. The end of the spring 21 is fixedly connected to the side of the pawl 20.

[0020] In this embodiment, the anti-reverse mechanism 15 is used to lock the screw 11 and the cylindrical head 12 against reverse rotation. When the screw is expanded and reinforced by the expansion anti-loosening mechanism 5, the cylindrical head 12 needs to be rotated clockwise. At this time, the ratchet 16 rotates synchronously with the cylindrical head 12. The end of the pawl 20 will always be pressed against the ratchet teeth of the ratchet 16 due to the lateral push of the spring 21 to restrict reverse rotation. When removing the screw, the pawl 20 can be moved to one side to rotate the cylindrical head 12 counterclockwise.

[0021] The working principle of this high-strength fastening screw will be explained in detail below.

[0022] according to Figure 1-5As shown, when using this utility model, a wrench or Allen wrench is used to screw the stud 1 and the hexagonal head 2 into the screw hole. The screw can be further reinforced. A small Allen wrench is inserted into the second hexagonal groove 13. Then, the cylindrical head 12 and the screw 11 are rotated clockwise to pull the frustum wedge 7. Since the frustum wedge 7 and the groove it is in (the outside of the cross groove 6 is cross-shaped for the anti-torsion protrusion 9 to slide, and its center is a frustum-shaped cavity for the frustum wedge 7 to slide) are both frustum-shaped, and the stud 1 is divided into four by the cross groove 6, when the frustum wedge 7 slides towards the cylindrical head 12, it will open the bottom end of the stud 1, making it tightly attached to the inner wall of the screw hole, thereby achieving expansion and reinforcement. The limiting protrusion 8 is located at the end of the stud 1 to prevent the frustum wedge 7 from sliding out of the cross groove 6. The anti-torsion protrusion 9 is used to limit the frustum wedge 7 from rotating synchronously with the screw 11. Before removing the screw, the cylindrical head 12 needs to be rotated counterclockwise to move the frustum wedge 7 away and exit the expansion and reinforcement state. The limiting piece 14 is used to provide support at this time. This application has a simple structure and improves the screw tightening effect. The anti-reverse mechanism 15 is used to lock the screw 11 and the cylindrical head 12 against reverse rotation. When the screw is expanded and reinforced by the expansion and anti-loosening mechanism 5, the cylindrical head 12 needs to be rotated clockwise. At this time, the ratchet 16 rotates synchronously with the cylindrical head 12. The end of the pawl 20 will always be pressed against the ratchet teeth of the ratchet 16 due to the lateral push of the spring 21 to limit the reverse rotation. When removing the screw, the pawl 20 can be moved to one side to rotate the cylindrical head 12 counterclockwise.

[0023] The above embodiments are merely exemplary embodiments of this utility model and are not intended to limit this utility model. The scope of protection of this utility model is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this utility model within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this utility model.

Claims

1. A high-strength fastening screw, comprising a stud (1), characterized in that: One end of the stud (1) is fixedly connected to a hexagonal head (2), the surface of the stud (1) is provided with a fastening thread (3), one side of the hexagonal head (2) is provided with a first hexagonal groove (4), the stud (1) and the hexagonal head (2) are provided with an expansion anti-loosening mechanism (5), and the hexagonal head (2) is provided with an anti-reverse mechanism (15). The expansion anti-loosening mechanism (5) includes a frustum wedge (7), the surface of which is integrally formed with an anti-torsion protrusion (9), and the stud (1) has a cross groove (6) inside. The surfaces of the frustum wedge (7) and the anti-torsion protrusion (9) are slidably connected inside the cross groove (6).

2. The high-strength fastening screw according to claim 1, characterized in that, The end of the stud (1) is integrally formed with a limiting protrusion (8), and the end of the frustum wedge (7) near the limiting protrusion (8) is movably connected to the side of the limiting protrusion (8). The end of the frustum wedge (7) away from the limiting protrusion (8) is provided with a threaded hole (10).

3. A high-strength fastening screw according to claim 2, characterized in that, The threaded hole (10) is internally threaded with a screw (11), one end of the screw (11) is fixedly connected to a limiting piece (14), and one side of the limiting piece (14) is fixedly connected to a cylindrical head (12).

4. A high-strength fastening screw according to claim 3, characterized in that, The surfaces of the screw (11), the limiting piece (14) and the cylindrical head (12) are rotatably connected to the inside of the screw (1) and the hexagonal head (2), and a second hexagonal groove (13) is provided on one side of the cylindrical head (12).

5. A high-strength fastening screw according to claim 3, characterized in that, The anti-reverse mechanism (15) includes a ratchet (16), the side of which is fixedly connected to one side of the cylindrical head (12). The first hexagonal groove (4) has a groove (17) inside, and a rotating shaft (18) and a fixed seat (19) are fixedly connected inside the groove (17).

6. A high-strength fastening screw according to claim 5, characterized in that, A pawl (20) is rotatably connected to the surface of the rotating shaft (18), and the end of the pawl (20) is movably connected to the edge ratchet tooth of the ratchet wheel (16). A spring (21) is fixedly connected to one side of the fixed seat (19), and the end of the spring (21) is fixedly connected to the side of the pawl (20).

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