Fastening bolt

Abstract

The invention discloses a fastening bolt and relates to the technical field of fasteners, the fastening bolt comprises an outer bolt head, a mounting groove is formed in the outer bolt head, one end and the top of the mounting groove both penetrate through the outer bolt head, a quick release bolt head is movably mounted in the outer bolt head, and a limiting mechanism is fixedly mounted at the bottom of the outer bolt head. By the adoption of the structure, when the device is used, a connecting steel wire can be drawn to enable a limiting ring to move upwards and a limiting telescopic spring to be compressed when the decorative flip cover is pried open through a screwdriver, and the screwdriver is inserted into a disassembly and assembly hole to drive an outer screw head to enable an adjustable screw rod to be screwed into a threaded hole; through occlusion of the limiting block and the limiting groove, attachment of the limiting ring and the anti-skid backing ring and elasticity of the telescopic spring, slipping of the external threads is avoided, after installation, the telescopic spring pulls back the connecting steel wire to enable the decorative flip cover to be closed, the magnetic ring adsorbs the flip cover, the decoration and protection effects are achieved, and the sliding base is prevented from being rusted.

Description

Technical Field

[0001] The invention belongs to the technical field of fasteners, and in particular relates to a fastening bolt. Background Art

[0002] As a vital mechanical connector, fastening bolts are widely and indispensable in various fields. They are generally long strips with external threads all around. They realize their connection function by cooperating with nuts or other parts with internal threads. However, the bolt heads under current technology are usually provided with threaded holes of different shapes or sizes, such as the common square, flat, inner triangle, triangular, cross, oval and plum blossom shapes. In actual operation, when the bolts need to be tightened, the user must select a matching designated screwdriver according to the difference in the shape of the screw groove of the bolt head to perform the tightening operation. However, in actual use scenarios, it is often the case that the user only has a single type of screwdriver, and at this time, it is impossible to tighten bolts of other different types, which undoubtedly brings many inconveniences to actual applications.

[0003] The Chinese patent with the announcement number "CN210318068U" discloses a fastening bolt, which includes a head, a screw rod arranged at the lower end of the head, a recessed groove, a cross groove, a slide plate and a slotted groove. This design allows the invention to be inserted with bolt cutters of different models and used to fix the fastening bolt, which has the effect of being more convenient to use;

[0004] However, during actual use, although the above-mentioned bolts can achieve quick disassembly and assembly of the screw heads, they still have certain limitations. They are only suitable for cross and flat-head screwdrivers. When faced with tightening requirements of other different shapes such as square, hexagonal, triangular, etc., it is obviously impossible to make corresponding adjustments and adaptations. At the same time, the disassembly and assembly holes of the screw heads are prone to rust or deformation during use, and the bolts cannot be disassembled at this time. It can be seen that there are certain defects and deficiencies in its overall use function. Moreover, in actual use, when the bolts are tightened in the threaded hole, if there is severe shaking, the tightened screw will be affected by external shaking and become loose, and may even fall off. In summary, the existing bolts have exposed certain defects and deficiencies in actual applications, and there is an urgent need to improve and optimize them to better meet various complex and changeable usage scenarios and needs and improve their overall practicality and reliability. Summary of the invention

[0005] In view of the problems mentioned in the background technology, the purpose of the present invention is to provide a fastening bolt to solve the problems in the prior art that the bolt has poor adaptability during overall disassembly and assembly and lacks good stability after installation.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions:

[0007] A fastening bolt comprises an outer screw head, a mounting groove is provided inside the outer screw head, one end and the top of the mounting groove both penetrate the outer screw head, a quick-release screw head is movably installed inside the outer screw head, a limiting mechanism is fixedly installed at the bottom of the outer screw head, an adjustable screw is fixedly installed in the middle of the bottom of the outer screw head, the limiting mechanism is sleeved on the outside of the adjustable screw, a protective mechanism is hinged on the top of the outer screw head, and the protective mechanism covers the outside of the mounting groove;

[0008] The quick-release screw head includes a slide seat and a slot. The slide seat is slidably connected to the inside of the installation slot. The slot is opened at both ends of the inside of the installation slot. Circular grooves are opened at both ends of the inner outer side of the slide seat. An elastic limiter is fixedly installed inside the circular groove. The outer end of the elastic limiter and the slot are engaged with each other. A linkage component is movably installed in the middle of the slide seat. The linkage component and the elastic limiter are meshed and connected. A disassembly hole is opened on the top of the slide seat.

[0009] Furthermore, the disassembly and assembly holes can be set to square, hexagonal, straight, inner triangle, triangular, cross, elliptical and plum blossom shapes with different specifications and shapes.

[0010] Furthermore, the elastic limiting member includes a torsion spring, which is fixedly installed at the top of the circular groove, and the bottom of the torsion spring is fixedly connected to a turntable, and the turntable is rotatably connected to the lower end of the circular groove, and a support shaft is fixedly installed at the bottom of the turntable, and a gear is fixedly installed at the middle of the outer surface of the support shaft, and the bottom of one gear and the top of the other gear are fixedly connected to a limiting plate, and the outer end of the limiting plate is arranged in a right-angle trapezoid as a whole, and the end of the limiting plate is inserted into the inside of the slot, and the right-angle plate of the limiting plate is fitted and connected with the right-angle edge in the slot.

[0011] Furthermore, the linkage assembly includes a sliding groove and an empty groove, the sliding groove is opened in the middle part of the sliding seat, the sliding groove is slidably connected to the inside of the sliding groove, the bottom of the sliding seat is fixedly connected to the sliding rod, both ends of the sliding rod are fixedly connected to the racks, the sliding rod is meshed with the racks and two gears on both sides, the outer end of the rack is fixedly connected to the pull-out plate, the pull-out plate is opened inside a pulling hole, the overall cross-sectional shape of the pulling hole is carefully T-shaped, the empty groove is opened in the middle part of the outer side of the sliding seat, and the pull-out plate is slidably connected to the inside of the empty groove.

[0012] Furthermore, the protective mechanism includes an articulated seat, which is fixedly mounted on one side of the external screw head. A decorative flap is hinged on the inner side of the articulated seat, and the decorative flap covers the outer side of the mounting groove on the external screw head.

[0013] Furthermore, a magnetic ring is fixedly mounted on the bottom of the decorative flap, and the decorative flap is magnetically connected to the outer screw head via the magnetic ring.

[0014] Furthermore, the limiting mechanism includes an annular groove and an anti-slip gasket, the annular groove is opened at the bottom of the outer screw head, the inside of the annular groove is fixedly connected with a telescopic spring, the bottom of the telescopic spring is fixedly installed with a limiting ring, the anti-slip gasket is slidably connected to the outside of the adjustable screw, the top of the anti-slip gasket is opened with limiting grooves at equal intervals, the limiting grooves can be opened on the outside of the threaded holes on the surface of the required installation position, the bottom of the limiting ring is fixedly connected with limiting blocks at equal intervals, and the end of the limiting block is inserted into the inner side of the limiting groove.

[0015] Furthermore, a connecting steel wire is fixedly connected to the top of the limiting ring, a through hole is opened on the side of the external screw head close to the connecting steel wire, the through hole passes through the external screw head, and the end of the connecting steel wire passes through the through hole and is fixedly connected to the decorative flap.

[0016] Furthermore, the adjustable screw includes a hexagonal rod, which is fixedly connected to the bottom of the external screw head. The outer surface of the hexagonal rod is slidably connected to an internal hexagonal sleeve. The outer surface of the internal hexagonal sleeve is provided with an external thread. One side of the internal hexagonal sleeve is provided with limiting holes arranged linearly at equal intervals. The lower end of the hexagonal rod is provided with a clamping piece, and the end of the clamping piece is inserted into the inside of a limiting hole.

[0017] Furthermore, the clamping part includes a mounting hole, which is opened at the lower end of one side of the hexagonal rod. A limiting spring is fixedly connected to the inside of the mounting hole, and the end of the limiting spring is fixedly connected to a limiting boss. The end of the limiting boss is inserted into the inner side of a limiting hole, and the outer end of the limiting boss is set to a circular arc shape.

[0018] In summary, the present invention mainly has the following beneficial effects:

[0019] First, in the present invention, when the device is used, the decorative flap is pried open by a screwdriver, which pulls the connecting steel wire to move the limit ring upward and compress the limit telescopic spring. The screwdriver is inserted into the disassembly hole to drive the external screw head to screw the adjustable screw into the threaded hole. After installation, the upper limit block of the limit ring is inserted into the limit groove, and the telescopic spring is reset to stably insert the limit block. The outer thread is prevented from slipping through the engagement of the limit block with the limit groove, the fit of the limit ring with the anti-slip pad ring, and the elastic force of the telescopic spring. After installation, the telescopic spring pulls back the connecting steel wire to close the decorative flap, and the magnetic ring adsorbs the flap, which plays a decorative and protective role and prevents the sliding seat from rusting.

[0020] Second, in the present invention, if the screwdriver is not matched or the slide seat is rusted and cannot be stably inserted and limited during use, tweezers or a hook can be used to hook the T-shaped pull hole. If there is no tool, a branch or the like can be used to hook the pull hole with the help of friction. Pulling the pull hole drives the pull plate to move the slide plate outward. The slide slides in the slide groove to keep the slide rod stable. The slide rod drives the rack, gear, support shaft and turntable to rotate, and the limit plate is pulled out of the slot, thereby pulling out the slide seat. Then, the slide seat of the corresponding disassembly hole is selected according to the shape of the screwdriver and inserted into the installation slot. The rear side of the limit plate is guided by the inclined surface. When it contacts the slot, the torsion spring is reset to insert the limit plate into the slot to complete the installation, so that the bolt can be conveniently adapted to various situations.

[0021] Third, in the present invention, when the bolt needs to be adjusted during use, the limiting boss at the arc-shaped end is pushed to contact the inner wall of the limiting hole, and the hexagonal sleeve can be pulled out to slide outside the hexagonal rod, and the limiting boss squeezes the limiting spring into the mounting hole, thereby adjusting the position of the inner hexagonal sleeve, and the spring is reset and inserted when the limiting boss reaches another limiting hole. In this way, the position of the external thread on the hexagonal rod can be flexibly adjusted, and the bolt length can be adjusted conveniently, thereby enhancing adaptability. Whether it is to cope with different installation scenarios or to meet different connection requirements, a stable connection can be achieved by adjusting the length, thereby improving flexibility and versatility of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the structure of the present invention when the decorative flap is removed and viewed from above;

[0024] Figure 3 It is a schematic diagram of the side structure of the protective mechanism of the present invention in a disassembled state;

[0025] Figure 4 It is a schematic diagram of the limiting mechanism and the quick-release screw head of the present invention when viewed from above;

[0026] Figure 5 It is a schematic structural diagram of the quick-release screw head of the present invention in a separated state;

[0027] Figure 6 It is a schematic diagram of the structure of the elastic limiting member of the present invention;

[0028] Figure 7 It is a schematic diagram of the structure of the limiting mechanism of the present invention;

[0029] Figure 8 This is a schematic diagram of the decorative flip cover structure of the present invention when viewed from above;

[0030] Fig. 9 It is a schematic diagram of the adjustable screw structure of the present invention.

[0031] Figure numerals: 1, external screw head; 2, limiting mechanism; 21, annular groove; 22, anti-skid pad ring; 23, telescopic spring; 24, limiting ring; 25, limiting groove; 26, limiting block; 27, connecting wire; 28, perforation; 3, quick-release screw head; 31, sliding seat; 32, slot; 33, circular groove; 34, disassembly hole; 35, linkage assembly; 351, sliding groove; 352, empty groove; 353, slider; 354, slide rod; 355, rack; 356, pull-out Plate; 357, pull hole; 36, elastic limiter; 361, torsion spring; 362, turntable; 363, support shaft; 364, gear; 365, limiter plate; 4, mounting groove; 5, protection mechanism; 51, hinge seat; 52, decorative flap; 53, magnetic ring; 6, adjustable screw; 61, hexagonal rod; 62, hexagonal sleeve; 63, limiter hole; 64, external thread; 65, clamping part; 651, mounting hole; 652, limiter spring; 653, limiter boss. DETAILED DESCRIPTION

[0032] refer to Figures 1 to 9 A fastening bolt of the present embodiment comprises an outer screw head 1, an installation groove 4 is provided inside the outer screw head 1, one end and the top of the installation groove 4 penetrate the outer screw head 1, a quick-release screw head 3 is movably installed inside the outer screw head 1, a limiting mechanism 2 is fixedly installed at the bottom of the outer screw head 1, an adjustable screw rod 6 is fixedly installed in the middle of the bottom of the outer screw head 1, the limiting mechanism 2 is sleeved on the outside of the adjustable screw rod 6, and a protective mechanism 5 is hinged on the top of the outer screw head 1, and the protective mechanism 5 covers the outside of the installation groove 4;

[0033] The quick-release screw head 3 includes a slide seat 31 and a slot 32. The slide seat 31 is slidably connected to the inside of the mounting groove 4. The slot 32 is opened at both ends of the inside of the mounting groove 4. Circular grooves 33 are opened at both ends of the inner outer side of the slide seat 31. An elastic limiter 36 is fixedly installed inside the circular groove 33. The outer end of the elastic limiter 36 and the slot 32 are mutually engaged. A linkage component 35 is movably installed in the middle of the slide seat 31. The linkage component 35 and the elastic limiter 36 are meshed and connected. A disassembly hole 34 is opened on the top of the slide seat 31. The mounting groove 4 is opened in the outer screw head 1 for installing the quick-release screw head 3, so that the structure is compact and convenient for the installation and replacement of the quick-release screw head 3. The slide seat 31 of the quick-release screw head 3 can slide in the mounting groove 4 and can be elastically disassembled. The limit piece 36 is engaged with the slot 32 to achieve stable installation. At the same time, the linkage assembly 35 is meshed with the elastic limit piece 36, which is convenient for disassembly when needed, thereby improving the flexibility and convenience of using the bolt. The limit mechanism 2 is sleeved on the outside of the adjustable screw 6, which can limit and protect the screw, ensuring its stability and reliability during operation. The protective mechanism 5 hinged on the top of the outer screw head 1 can cover the outside of the installation slot 4 to play a protective role, preventing dust, moisture and other impurities from entering the installation slot 4 and affecting the performance of the bolt. At the same time, it also plays a certain decorative role on the internal structure, thereby improving the overall performance and service life of the bolt, so that it can better play a fastening and connection role in various application scenarios.

[0034] refer to Figure 1-Figure 5 The disassembly hole 34 can be set to square, hexagonal, straight, inner triangle, triangular, cross, elliptical and plum blossom shapes of different specifications and shapes. The disassembly hole 34 of the fastening bolt can be set to a variety of different specifications and shapes, which has significant advantages. The disassembly holes 34 of different shapes can meet the use requirements of various types of screwdrivers, greatly improving the adaptability of the tool. Whether it is a common hexagonal, cross, or a more special inner triangle, triangular, elliptical and plum blossom, corresponding operating tools can be found, which is very practical in actual use scenarios. For example, in the maintenance of some specific industrial equipment, it may be necessary to use a screwdriver of a specific shape to operate the bolt, and this design that can set disassembly holes 34 of various shapes can well adapt to this demand. For disassembly holes 34 of simple shapes such as straight, they can also play a role in some occasions where the torque requirement is not high but fast operation is required. This diversified design enables the fastening bolt to be easily installed and disassembled under different working environments and operating requirements, reducing the operating difficulties caused by tool mismatch, improving work efficiency, and enhancing the versatility and practicality of the bolt.

[0035] refer to Figure 1-Figure 8The elastic limiting member 36 includes a torsion spring 361, which is fixedly installed at the top of the circular groove 33. The bottom of the torsion spring 361 is fixedly connected to a turntable 362, which is rotatably connected to the lower end of the circular groove 33. A support shaft 363 is fixedly installed at the bottom of the turntable 362. A gear 364 is fixedly installed at the middle of the outer surface of the support shaft 363. The bottom of one gear 364 and the top of another gear 364 are fixedly connected to a limiting plate 365. The outer end of the limiting plate 365 is arranged in a right-angle trapezoid as a whole. The end of the limiting plate 365 is inserted into the interior of the card slot 32. The right-angle plate of the limiting plate 365 is fitted and connected with the right-angle edge in the card slot 32. The linkage component 35 includes a slide slot 351 and an empty slot 352. The slide slot 351 is opened at In the middle of the slide seat 31, a slider 353 is slidably connected to the inside of the slide groove 351, and the bottom of the slider 353 is fixedly connected to the slide rod 354. Both ends of the slide rod 354 are fixedly connected to racks 355. The slide rod 354 is meshed with the racks 355 on both sides and two gears 364. The outer end of the rack 355 is fixedly connected to a pull-out plate 356. A pull hole 357 is provided inside the pull-out plate 356. The overall cross-sectional shape of the pull hole 357 is T-shaped. The empty slot 352 is provided in the middle of the outer side of the slide seat 31. The pull-out plate 356 is slidably connected to the inside of the empty slot 352. The torsion spring 361 in the elastic limiter 36 provides an elastic supporting force for the turntable 362, so that the turntable 362 can stably rotate in the circular slot 33. When the turntable 362 rotates, the gear 364 is driven to rotate through the support shaft 363, thereby driving the limit plate 365 to move. The outer end of the limit plate 365 is a right-angled trapezoid and is closely connected with the right-angled edge in the slot 32. This design allows the limit plate 365 to fit tightly when inserted into the slot 32, providing a stable limiting effect, effectively preventing the slide seat 31 from moving randomly in the installation slot 4, and ensuring the stability of the bolt connection. The slide groove 351 in the linkage assembly 35 provides a sliding track for the slider 353, ensuring the linearity and stability of the movement of the slider 353. The slide rod 354 at the bottom of the slider 353 is meshed with the two gears 364 through the racks 355 at both ends, realizing the transmission and conversion of force. When the pull-out plate 356 is pulled, the pull-out plate 356 slides in the empty groove 352, driving the slide rod 354 to move, and then driving the gear 364 to rotate through the rack 355, so as to control the extension and retraction of the limit plate 365. This design makes the operation more convenient when the slide seat 31 needs to be disassembled or installed. The pulling hole 357 is designed with a T-shaped cross-section, which facilitates the insertion and operation of tools such as tweezers, hooks, and even hook-shaped or rough-surfaced objects such as branches, thereby increasing the convenience and operability of the operation. The overall design makes the installation and removal process of the bolt slide seat 31 simple and efficient, and can ensure the stability and reliability of the connection during use, improve the overall performance and service life of the bolt, and is suitable for various different usage scenarios and needs.

[0036] refer to Figure 1-Figure 3 and Figure 8 The protection mechanism 5 includes an articulated seat 51, which is fixedly installed on one side of the outer screw head 1. A decorative flap 52 is hinged on the inner side of the articulated seat 51. The decorative flap 52 covers the outer side of the mounting groove 4 on the outer screw head 1. A magnetic ring 53 is fixedly installed on the bottom of the decorative flap 52. The decorative flap 52 is magnetically connected to the outer screw head 1 through the magnetic ring 53. The limiting mechanism 2 includes an annular groove 21 and an anti-slip pad ring 22. The annular groove 21 is opened at the bottom of the outer screw head 1. A telescopic spring 23 is fixedly connected to the inside of the annular groove 21. A limiting ring 24 is fixedly installed on the bottom of the telescopic spring 23. The anti-slip pad ring 22 is slidably connected to the outer side of the adjustable screw 6. The top of the anti-slip pad ring 22 is evenly spaced to open limiting grooves 25. The limiting grooves 25 can be opened at the required The bottom of the limiting ring 24 is evenly spaced and fixedly connected to the limiting block 26, and the end of the limiting block 26 is inserted into the inner side of the limiting groove 25. The top of the limiting ring 24 is fixedly connected with a connecting wire 27. A through hole 28 is provided on the side of the outer screw head 1 close to the connecting wire 27. The through hole 28 penetrates the outer screw head 1, and the end of the connecting wire 27 penetrates the through hole 28 and is fixedly connected to the decorative flap 52. The hinged seat 51 in the protective mechanism 5 enables the decorative flap 52 to be flexibly opened and closed. The decorative flap 52 covers the outer side of the installation groove 4 of the outer screw head 1, which not only plays a physical protective role, effectively prevents dust, impurities, etc. from entering the installation groove 4 and protects the internal structure from erosion, but also is magnetically connected to the outer screw head 1 through the magnetic ring 53. The decorative flap 52 can be opened and closed at any time during use, and the operation is simple and convenient. In the limiting mechanism 2, the telescopic spring 23 in the annular groove 21 provides an elastic supporting force for the limiting ring 24. When the bolt is installed, the limiting block 26 at the bottom of the limiting ring 24 can be inserted into the limiting groove 25 at the top of the anti-slip pad ring 22. The limiting block 26 cooperates with the limiting groove 25 to further limit the bolt, thereby enhancing the stability of the bolt during use and effectively preventing the bolt from loosening or displacement due to external force. In particular, in some vibration or complex force environments, this limiting effect is particularly important. At the same time, the connecting wire 2 7 The limiting ring 24 is connected to the decorative flap 52. When the decorative flap 52 is opened, the connecting wire 27 can drive the limiting ring 24 to move upward, which is convenient for the installation operation of the bolt. After the installation is completed, the telescopic spring 23 can prompt the decorative flap 52 to close through the connecting wire 27, thereby realizing the linkage and automation of the overall structure, improving the operating efficiency and convenience of use. The anti-skid pad ring 22 slides on the outside of the adjustable screw 6, which not only plays an anti-skid role, but also increases the friction between the bolt and the installation surface, further improving the stability of the connection. In addition, the setting position of the limiting groove 25 is flexible, and can be opened on the outside of the threaded hole on the surface of the required installation position according to actual needs. It has strong adaptability, so that the bolt can be widely used in various installation scenarios.

[0037] refer to Figure 1-Figure 3 and Fig. 9 The adjustable screw 6 includes a hexagonal rod 61, which is fixedly connected to the bottom of the external screw head 1. The outer surface of the hexagonal rod 61 is slidably connected with an inner hexagonal sleeve 62. The outer surface of the inner hexagonal sleeve 62 is provided with an external thread 64. One side of the inner hexagonal sleeve 62 is provided with limit holes 63 arranged linearly at equal intervals. The lower end of the hexagonal rod 61 is provided with a clamping piece 65. The end of the clamping piece 65 is inserted into the inside of a limit hole 63. The clamping piece 65 includes a mounting hole 651. The mounting hole 651 is provided at the lower end of one side of the hexagonal rod 61. The inside of the mounting hole 651 is fixedly connected to a limit spring 652. The end of the limit spring 652 is fixedly connected to the limit convex Column 653, the end of the limiting protrusion 653 is inserted into the inner side of a limiting hole 63, the outer end of the limiting protrusion 653 is set to an arc shape, the hexagonal rod 61 provides a stable support and sliding track for the inner hexagonal sleeve 62, ensuring that the inner hexagonal sleeve 62 can slide smoothly on its outer surface, and the external thread 64 on the outer surface of the inner hexagonal sleeve 62 enables the bolt to have a basic fastening function, and through the combination with the inner hexagonal sleeve 62, tools can be better used for operation during installation and removal, which improves the convenience and efficiency of operation. The adjustable design is a highlight. By sliding the inner hexagonal sleeve 62 on the hexagonal rod 61, The overall length of the bolt can be flexibly adjusted to adapt to connecting parts of different thicknesses or different installation requirements. This is very practical in practical applications. For example, in some occasions where high assembly accuracy is required, or when facing installation objects of different specifications, the bolt length can be accurately adjusted to ensure the stability and reliability of the connection. The cooperation between the limiting hole 63 and the clamping member 65 plays a key limiting role. The limiting spring 652 in the clamping member 65 provides elastic support for the limiting boss 653. When the end of the limiting boss 653 is inserted into the limiting hole 63, the position of the hexagonal sleeve 62 on the hexagonal rod 61 can be effectively fixed to prevent it from The outer end of the limiting boss 653 is set to be an arc shape, so that when adjusting the position of the inner hexagon socket 62, it is only necessary to gently push the limiting boss 653, and its arc-shaped end can smoothly contact the inner wall of the limiting hole 63 and squeeze the limiting spring 652, so that the limiting boss 653 is received in the mounting hole 651. At this time, the inner hexagon socket 62 can be easily slid for length adjustment. This design is convenient for operation and improves the accuracy and flexibility of adjustment, so that the adjustable screw 6 can perform well in various complex use environments, and enhances the overall performance and application range of the fastening bolt.

[0038] Principle and advantages of use: During the use of the device, by setting the limiting mechanism 2 and the protective mechanism 5, when using the bolts for installation, first use a screwdriver to pry open the decorative flap 52. In this process, the decorative flap 52 will be opened and the connecting wire 27 will be pulled. As the connecting wire 27 is pulled, the limiting ring 24 will move upward. At this time, the limiting telescopic spring 23 is in a compressed state. After the screwdriver pries open the decorative flap 52, it is inserted into the inside of the disassembly hole 34, and then the screwdriver is twisted to drive the outer screw head 1 to drive the adjustable screw 6 to rotate so that it drills into the inner side of the threaded hole to be installed. After the installation is completed, the limiting block 26 on the limiting ring 24 can be inserted into the inner side of the limiting groove 25. At this time, with the help of the resetting effect of the telescopic spring 23, the limiting block 26 can be stably inserted into the inside of the limiting groove 25. Through the mutual engagement of the limiting block 26 and the limiting groove 25, The limiting ring 24 and the anti-skid washer 22 can be stably fitted together. In this way, after the screw and the anti-skid washer 22 are stably fitted together, the bolt can be stably installed. The mutual limiting effect of the limiting groove 25 and the limiting ring 24, plus the elastic force provided by the telescopic spring 23, prompts the limiting block 26 and the limiting groove 25 to be stably plugged in. As a whole, the phenomenon of slipping of the external thread 64 under severe shaking can be effectively avoided. Moreover, after the installation is completed, the telescopic spring 23 will reset and pull the connecting steel wire 27, thereby prompting the decorative flap 52 to close. At the same time, the magnetic ring 53 can also adsorb the decorative flap 52 to the top of the external screw head 1. The decorative flap 52 covers the top of the external screw head 1 and can completely cover the entire slide seat 31, thereby achieving excellent decorative and protective performance, effectively preventing the slide seat 31 from being rusted, extending the service life of the bolt, and improving its appearance and stability in use.

[0039] By setting the quick-release screw head 3, if the screwdriver does not match or the slide seat 31 is severely rusted, resulting in the screwdriver being unable to be stably inserted into the limit position, the device also has a clever countermeasure. The pull hole 357 here is designed as a T-shape by taking out tweezers or a hook, and has a certain particularity. If there is no tool such as a hook, objects such as branches can be directly inserted into it for adjustment, because even if it is a branch, a certain friction force will be generated between it and the pull hole 357, and the pull hole 357 can also be hooked. By pulling the pull hole 357, the pull plate 356 can be driven to move the slide plate outward. At this time, the slider 353 will slide on the inner side of the slide groove 351. This design can well maintain the sliding stability of the slide rod 354. After the slide rod 354 slides, it can drive the rack 355 to drive the gear 364 to rotate. The rotation of the gear 364 will drive the support shaft 363 to drive the turntable 362 to rotate, thereby pulling the limit plate 365 away from the inner side of the slot 32 of the installation slot 4. When the limit plate 365 is out of the slot 32, the slide 31 can be pulled out. At this time, the slide 31 with the disassembly hole 34 of the corresponding shape can be selected according to the shape of the screwdriver, and the slide 31 can be directly inserted into the inner side of the installation slot 4. The rear inclined surface of the isosceles trapezoidal limit plate 365 can play a guiding role. During the insertion of the slide 31, the inward movement of the limit plate 365 will drive the torsion spring 361 to be in a compressed state. When the slide 31 is fully inserted into the interior of the installation slot 4, the limit plate 365 contacts the slot 3 2, the torsion spring 361 will reset and drive the limiting plate 365 to insert into the inner side of the slot 32, and the installation of the slide seat 31 can be completed through the mutual limitation of the limiting plate 365 and the slot 32. It can be seen that the bolt can quickly disassemble and assemble the slide seat 31 during use, whether it is rusted and cannot be disassembled at the disassembly hole 34, or the shape and specification of the disassembly hole 34 are not suitable, it can be replaced. The overall use is more convenient and has strong adaptability, which is worthy of wide promotion and application in related fields.

[0040] By setting the adjustable screw 6, when the adjustable screw 6 needs to be adjusted during use of the device, the limiting boss 653 can be pushed. Since the end of the limiting boss 653 is designed to be arc-shaped, it is only necessary to push the limiting boss 653 with a little force to make the front end arc surface of the limiting boss 653 contact the inner wall of the limiting hole 63. At this time, the hexagonal sleeve can be pulled out to slide on the outer surface of the hexagonal rod 61. Once the hexagonal sleeve is pulled out to slide, the arc surface of the front end of the limiting boss 653 can squeeze the limiting spring 652, so that the limiting boss 653 is retracted into the inside of the mounting hole 651. At this time, the position of the limiting boss 653 can be flexibly adjusted. The position of the hexagonal sleeve 62 on the hexagonal rod 61 is adjusted. When the limiting boss 653 moves to another limiting hole 63, the limiting spring 652 will be reset and inserted into the inner side of the limiting hole 63. Such reciprocating operation can flexibly adjust the position of the hexagonal sleeve 62 on the hexagonal rod 61, thereby realizing flexible adjustment of the position of the external thread 64 on the hexagonal rod 61. It can be seen that the device as a whole can conveniently adjust the length of the fastening bolt, which can improve the adaptability of the bolt during use, so that it can better adapt to different installation scenarios and requirements, and enhance its flexibility and versatility in use.

Claims

1. A fastening bolt, comprising an outer screw head (1), characterized in that: The outer screw head (1) is provided with a mounting groove (4) inside, one end and the top of the mounting groove (4) penetrate the outer screw head (1), a quick-release screw head (3) is movably installed inside the outer screw head (1), a limiting mechanism (2) is fixedly installed at the bottom of the outer screw head (1), an adjustable screw rod (6) is fixedly installed in the middle of the bottom of the outer screw head (1), the limiting mechanism (2) is sleeved on the outside of the adjustable screw rod (6), and a protective mechanism (5) is hinged on the top of the outer screw head (1), and the protective mechanism (5) covers the outside of the mounting groove (4); The quick-release screw head (3) comprises a slide seat (31) and a clamping groove (32); the slide seat (31) is slidably connected to the inside of the installation groove (4); the clamping groove (32) is provided at two ends inside the installation groove (4); circular grooves (33) are provided at both ends of the inner and outer sides of the slide seat (31); an elastic limiting member (36) is fixedly installed inside the circular groove (33); the outer end of the elastic limiting member (36) and the clamping groove (32) are clamped with each other; a linkage assembly (35) is movably installed in the middle of the slide seat (31); the linkage assembly (35) and the elastic limiting member (36) are meshed and connected; and a disassembly hole (34) is provided at the top of the slide seat (31).

2. A fastening bolt according to claim 1, characterized in that: The disassembly and assembly holes (34) can be arranged in square, hexagonal, straight, inner triangle, triangular, cross, elliptical and plum blossom shapes with different specifications and shapes.

3. A fastening bolt according to claim 1, characterized in that: The elastic limiting member (36) comprises a torsion spring (361), wherein the torsion spring (361) is fixedly mounted on the top of the circular groove (33), the bottom of the torsion spring (361) is fixedly connected with a rotating disk (362), the rotating disk (362) is rotatably connected to the lower end of the circular groove (33), the bottom of the rotating disk (362) is fixedly mounted with a support shaft (363), a gear (364) is fixedly mounted on the middle part of the outer surface of the support shaft (363), the bottom of one gear (364) and the top of another gear (364) are both fixedly connected with a limiting plate (365), the outer end of the limiting plate (365) is arranged in a right-angle trapezoid as a whole, the end of the limiting plate (365) is inserted into the interior of the card slot (32), and the right-angle plate of the limiting plate (365) is fitted and connected with the right-angle edge in the card slot (32).

4. A fastening bolt according to claim 3, characterized in that: The linkage assembly (35) includes a slide groove (351) and an empty groove (352). The slide groove (351) is opened in the middle of the slide seat (31). The slide groove (351) is slidably connected to a slider (353) inside. The bottom of the slider (353) is fixedly connected to a slide rod (354). Both ends of the slide rod (354) are fixedly connected to racks (355). The slide rod (354) is meshedly connected to the racks (355) and two gears (364) on both sides. The outer end of the rack (355) is fixedly connected to a pull-out plate (356). A pull-out hole (357) is opened inside the pull-out plate (356). The overall cross-sectional shape of the pull-out hole (357) is carefully arranged in a T shape. The empty groove (352) is opened in the middle of the outer side of the slide seat (31). The pull-out plate (356) is slidably connected to the inside of the empty groove (352).

5. A fastening bolt according to claim 1, characterized in that: The protection mechanism (5) comprises a hinged seat (51), the hinged seat (51) is fixedly mounted on one side of the external screw head (1), a decorative flap (52) is hingedly mounted on the inner side of the hinged seat (51), and the decorative flap (52) covers the outer side of the mounting groove (4) on the external screw head (1).

6. A fastening bolt according to claim 5, characterized in that: A magnetic ring (53) is fixedly mounted on the bottom of the decorative flap (52), and the decorative flap (52) is magnetically connected to the outer screw head (1) via the magnetic ring (53).

7. A fastening bolt according to claim 6, characterized in that: The limiting mechanism (2) comprises an annular groove (21) and an anti-skid pad ring (22); the annular groove (21) is provided at the bottom of the external screw head (1); a telescopic spring (23) is fixedly connected to the inside of the annular groove (21); a limiting ring (24) is fixedly installed at the bottom of the telescopic spring (23); the anti-skid pad ring (22) is slidably connected to the outside of the adjustable screw rod (6); limiting grooves (25) are provided at equal intervals on the top of the anti-skid pad ring (22); the limiting grooves (25) can be provided at the outside of the threaded holes on the surface of the desired installation position; a limiting block (26) is fixedly connected to the bottom of the limiting ring (24) at equal intervals; and the end of the limiting block (26) is inserted into the inner side of the limiting groove (25).

8. A fastening bolt according to claim 7, characterized in that: A connecting steel wire (27) is fixedly connected to the top of the limiting ring (24); a through hole (28) is provided on a side of the external screw head (1) close to the connecting steel wire (27); the through hole (28) passes through the external screw head (1); and the end of the connecting steel wire (27) passes through the through hole (28) and is fixedly connected to the decorative flap (52).

9. A fastening bolt according to claim 1, characterized in that: The adjustable screw rod (6) comprises a hexagonal rod (61), the hexagonal rod (61) is fixedly connected to the bottom of the external screw head (1), the outer surface of the hexagonal rod (61) is slidably connected to an inner hexagonal sleeve (62), the outer surface of the inner hexagonal sleeve (62) is provided with an external thread (64), one side of the inner hexagonal sleeve (62) is provided with limiting holes (63) arranged linearly at equal intervals, and the lower end of the hexagonal rod (61) is provided with a clamping piece (65), and the end of the clamping piece (65) is inserted into the inside of a limiting hole (63).

10. A fastening bolt according to claim 9, characterized in that: The clamping member (65) comprises a mounting hole (651), wherein the mounting hole (651) is provided at the lower end of one side of the hexagonal rod (61), the interior of the mounting hole (651) is fixedly connected to a limiting spring (652), the end of the limiting spring (652) is fixedly connected to a limiting boss (653), the end of the limiting boss (653) is inserted into the inner side of a limiting hole (63), and the outer end of the limiting boss (653) is arranged to be in an arc shape.

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