A bolt with telescopic function and a method of using the same

Abstract

This invention discloses a telescopic bolt and its usage method, relating to the field of bolt fastening technology. It addresses the problem that while existing telescopic bolts can disassemble bolts of varying sizes, their telescopic movement relies entirely on spring pressure, making it difficult to stabilize the extended distance and thus reducing bolt installation stability. A nut is fixedly mounted above the upper screw, and a lower screw is movably mounted below it. The upper screw has a sliding rod groove inside, and a sliding rod is fixedly mounted at the upper end of the lower screw. A limit block locking structure groove is formed in the middle of the sliding rod. A limit block locking structure is movably mounted inside the limit block locking structure groove. Second limit block grooves are symmetrically arranged on both sides of the limit block locking structure groove, and limit blocks are slidably mounted inside the second limit block grooves. Two driving blocks are arranged vertically above and below the end of each limit block near the limit block locking structure.

Description

Technical Field

[0001] This invention relates to the field of fastening bolt technology, and in particular to a bolt with telescopic function and its method of use. Background Technology

[0002] A bolt is a cylindrical threaded fastener that is fitted with a nut. It consists of a head and a threaded shank, and is used to fasten two parts with through holes. This type of connection is called a bolted connection. Since the two parts can be separated by unscrewing the nut, a bolted connection is a detachable connection. In practice, the threaded hole depths of different devices vary, often requiring bolts of different lengths for connection, sometimes necessitating the use of washers. This wastes manpower and resources and does not improve work efficiency. Therefore, bolts need to have a telescoping function to solve this problem.

[0003] Chinese Patent Publication No. CN206017387U, authorized on March 15, 2017, discloses a telescopic handle bolt, comprising a screw rod with a groove at its top. The top of the screw rod is fixedly connected to the bottom of a nut. A groove is formed on the upper surface of the nut, and the bottom of the groove communicates with the groove. A pressure spring is provided in the groove, one end of which is fixedly connected to one end of a telescopic rod. A handle is attached to the groove, and the other end of the telescopic rod extends into the groove and is fixedly connected to the bottom of the handle. This telescopic handle bolt, through the coordinated use of a pressure spring, a telescopic rod, a handle, and a cover plate, allows the telescopic rod and handle to pop out of the nut of the bolt being screwed into the bolt hole. Since the telescopic rod and the inner cavity of the groove are both square, turning the handle can rotate the screw rod, thus eliminating the need to carry multiple bolt wrenches of different sizes to disassemble bolts of different sizes, thereby reducing inconvenience for maintenance personnel.

[0004] The existing technical solutions mentioned above have the following drawbacks: although they can disassemble bolts of different sizes, their extension and retraction rely entirely on the pressure of the spring, making it difficult to stabilize the distance after extension and retraction, thus reducing the stability of bolt installation. Therefore, we propose a bolt with extension and retraction function and its usage method to solve the problems mentioned above. Summary of the Invention

[0005] The purpose of this invention is to provide a bolt with telescopic function and its usage method, in order to solve the problem mentioned in the background art that although existing telescopic bolts can disassemble bolts of different sizes, their telescopic movement relies entirely on the pressure of the spring, making it difficult to stabilize the distance after telescopic movement, thus reducing the stability of bolt installation.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a bolt with telescopic function, comprising an upper screw, a nut fixedly disposed above the upper screw, and a lower screw movably disposed below the upper screw. The upper screw has a sliding rod groove inside, and a sliding rod is fixedly disposed at the upper end of the lower screw, with the sliding rod slidably connected to the sliding rod groove. A limit block locking structure groove is formed at the middle position of the sliding rod, and a limit block locking structure is movably disposed inside the limit block locking structure groove. Second limit block grooves are symmetrically arranged on both sides of the limit block locking structure groove, and limit blocks are slidably disposed inside the second limit block grooves. Two driving blocks are arranged vertically at the end of each limit block near the limit block locking structure. Push block assemblies are symmetrically arranged on both sides of the upper end of the limit block locking structure, each push block assembly including two push blocks. A chemical agent bubble groove is disposed inside the nut, and a chemical agent bubble is disposed inside the chemical agent bubble groove.

[0007] Preferably, the outer surface of the lower screw is provided with threads.

[0008] Preferably, the lower end of the chemical reagent bubble tank is connected to the middle position of the upper end of the sliding rod groove. An upper sealing film is provided above the chemical reagent bubble and is fixedly connected to the inner wall of the chemical reagent bubble tank. A lower sealing film is provided below the chemical reagent bubble and is fixedly connected to the inner wall of the lower end of the chemical reagent bubble tank. The upper sealing film is made of rubber and the lower sealing film is made of plastic. The chemical reagent bubble has a fan-shaped structure.

[0009] Preferably, a first compression spring is provided between the upper end of the limiting block locking structure and the inner wall of the limiting block locking structure groove, a magnetic block is provided at the upper end of the limiting block locking structure, and a support block is provided at the lower end of the limiting block locking structure. The support block and the magnetic block are the same size, and the lower end face of the support block is in contact with the lower screw.

[0010] Preferably, a drive rod is provided at the middle position of the limiting block locking structure, and the drive rod is fixedly connected to the magnetic block and the support block respectively. One end of the push block extends into the interior of the second limiting block groove. The push block is an isosceles trapezoidal structure, and the width of the end of the push block near the drive rod is greater than the other end. The drive block is an isosceles trapezoidal structure, and the push block fits against the drive block. The width of the end of the drive block near the limiting block is greater than the other end.

[0011] Preferably, the upper and lower ends of the limiting block are symmetrically provided with protrusions, and a second tension spring is provided between the rear side of the protrusion and the inner wall of the second limiting block groove. The two sides of the sliding rod groove are symmetrically provided with first limiting block grooves, and the first limiting block grooves are rectangular grooves. One end of the limiting block extends into the interior of the first limiting block groove, and the limiting block is in contact with the inner wall of the first limiting block groove.

[0012] Preferably, the upper end of the nut has a bolt hole, and the bolt hole is located above the chemical reagent soaking tank, and the chemical reagent soaking tank communicates with the bolt hole.

[0013] Preferably, vent pipes are symmetrically arranged on both sides inside the nut, the upper end of the vent pipes is connected to the outside of the upper end of the nut, and the lower end of the vent pipes is connected to the sliding rod groove. The upper end of the vent pipes has a serpentine structure.

[0014] A method for using a bolt with telescopic function includes the following steps:

[0015] Step 1: Pull the lower screw downwards, allowing the sliding rod to slide to the lower end of the locking structure groove of the limiting block. Attract the magnet to one side of the nut. The magnetic force is greater than the spring force of the first compression spring. Due to the magnetic force, the locking structure of the limiting block with the magnetic block moves upwards. At this time, the pushing block pushes the driving block. When the pushing force is greater than the spring force of the second tension spring, the limiting block slides into the groove of the first limiting block. At this time, the vertical side of the driving block is in contact with the vertical side of the pushing block above. The limiting block moves into the groove of the first limiting block, and the limiting block allows the upper screw and the sliding rod to be fixedly clamped together.

[0016] Step 2: Insert the screwdriver into the bolt hole and drive the bolt into the mounting hole until the rear end of the bolt is in contact with the rear end of the mounting hole.

[0017] Step 3: Remove the magnet. The elastic force of the first compression spring causes the locking structure groove of the limiting block to move downward, pushing the side of the block to fit against the inclined surface of the drive block, thus releasing the limiting block.

[0018] Step 4: Press the upper screw into the mounting hole to move the excess sliding rod deeper into the sliding rod groove;

[0019] Step 5: The elastic force of the first compression spring causes the vertical side of the push block to fit against the vertical side of the drive block below, thereby limiting the position of the limit block again and maintaining the stability of the relative position of the screw and the lower screw.

[0020] Step 6: Press the upper sealing membrane in the chemical agent bubble tank. The diameter of the lower sealing membrane is smaller than that of the upper sealing membrane. The hydraulic pressure of the chemical agent bubble causes the lower sealing membrane to break, and the chemical agent enters the sliding rod groove. The air inside the sliding rod groove is discharged through the air outlet pipe. After the chemical agent solidifies, it makes the position of the upper screw and the lower screw more stable.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. The limiting block locking structure of the present invention can slide inside the limiting block locking structure groove. The limiting block locking structure can be pressed by the setting of the first compression spring. At this time, the support block is in contact with the lower screw, and the vertical side of the driving block is in contact with the vertical side of the upper pushing block. The limiting block moves into the first limiting block groove. The limiting block fixes the upper screw and the sliding rod. When adjustment is required, the magnetic block can be attracted by the magnet, so that the side of the pushing block is in contact with the inclined surface of the driving block, releasing the limiting block. At this time, the distance between the upper screw and the lower screw can be adjusted. After the adjustment is completed, the limiting block can be locked again by the elastic force of the first compression spring. This solves the problem that although the existing telescopic bolts can disassemble bolts of different sizes, their extension and retraction rely entirely on the pressure of the spring, making it difficult to stabilize the distance after extension and retraction, thus reducing the stability of bolt installation.

[0023] 2. By pressing the upper sealing membrane inside the chemical agent bubble, the lower sealing membrane, whose diameter is smaller than that of the upper sealing membrane, causes the lower sealing membrane to break due to the hydraulic pressure of the chemical agent bubble. The chemical agent enters the sliding rod groove, and the air inside the sliding rod groove is discharged through the air outlet pipe. After the chemical agent solidifies, it makes the positions of the upper and lower screws more stable. Attached Figure Description

[0024] Figure 1 This is the front view of the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of the present invention;

[0026] Figure 3 In this invention Figure 2 A magnified view of a portion of area A;

[0027] Figure 4 This is a schematic diagram of the nut structure in this invention;

[0028] Figure 5 This is a perspective view of the connection relationship between the lower screw and the screw in this invention;

[0029] Figure 6 This is a perspective view of the limiting block locking structure in this invention.

[0030] In the diagram: 1. Upper screw; 2. Lower screw; 3. Nut; 4. Thread; 5. Chemical bubble; 6. Sliding rod groove; 7. Sliding rod; 8. Limiting block locking structure; 9. Limiting block; 10. First limiting block groove; 11. Second limiting block groove; 12. Limiting block locking structure groove; 13. First compression spring; 14. Magnetic block; 15. Second tension spring; 16. Drive block; 17. Bolt hole; 18. Chemical bubble groove; 19. Upper sealing membrane; 20. Lower sealing membrane; 21. Vent pipe; 22. Drive rod; 23. Push block; 24. Support block. Detailed Implementation

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0032] Please see Figure 1-6 An embodiment of the present invention provides a bolt with telescopic function, comprising an upper screw 1, a nut 3 fixedly disposed above the upper screw 1, a lower screw 2 movably disposed below the upper screw 1, a sliding rod groove 6 provided inside the upper screw 1, a sliding rod 7 fixedly disposed at the upper end of the lower screw 2, and the sliding rod 7 slidably connected to the sliding rod groove 6, a limit block locking structure groove 12 provided at the middle position of the sliding rod 7, a limit block locking structure 8 movably disposed inside the limit block locking structure groove 12, second limit block grooves 11 symmetrically disposed on both sides of the limit block locking structure groove 12, a limit block 9 slidably disposed inside the second limit block groove 11, two driving blocks 16 disposed vertically at the end of the limit block 9 near the limit block locking structure 8, a push block group symmetrically disposed on both sides of the upper end of the limit block locking structure 8, the push block group including two push blocks 23, a chemical agent bubble groove 18 disposed inside the nut 3, and a chemical agent bubble 5 disposed inside the chemical agent bubble groove 18.

[0033] In use, the limiting block locking structure 8 can slide inside the limiting block locking structure groove 12. The limiting block locking structure 8 can be pressed by the first compression spring 13. At this time, the support block 24 is in contact with the lower screw 2, the vertical side of the drive block 16 is in contact with the vertical side of the upper push block 23, and the limiting block 9 moves into the first limiting block groove 10. The limiting block 9 fixes the upper screw 1 and the sliding rod 7. When adjustment is required, the magnet can attract the magnetic block 14, so that the side of the push block 23 is in contact with the inclined surface of the drive block 16, releasing the limitation of the limiting block 9. At this time, the distance between the upper screw 1 and the lower screw 2 can be adjusted. After the adjustment is completed, the limiting block 9 can be locked again by the elastic force of the first compression spring 13. After the fixation is completed, the chemical agent is injected into the sliding rod groove 6 to improve the locking of the position of the upper screw 1 and the lower screw 2.

[0034] 1. Upper screw 2. Lower screw 3. Nut 4. Thread 5. Chemical bubble 6. Sliding rod groove 7. Limiting block locking structure 8. Limiting block 9. First limiting block groove 10. Second limiting block groove 11. Limiting block locking structure groove 12. First compression spring 13. Magnetic block 14. Second tension spring 15. Drive block 16. Bolt hole 17. Chemical bubble groove 18. Upper sealing film 19. Lower sealing film 20. Vent pipe 21. Drive rod 22. Push block 23. Support block 24.

[0035] Please see Figure 1-2 The outer surface of the lower screw 2 is provided with threads 4.

[0036] Please see Figure 2 and Figure 4 The lower end of the chemical reagent bubble tank 18 is connected to the middle position of the upper end of the sliding rod groove 6. An upper sealing membrane 19 is provided above the chemical reagent bubble 5 and is fixedly connected to the inner wall of the chemical reagent bubble tank 18. A lower sealing membrane 20 is provided below the chemical reagent bubble 5 and is fixedly connected to the inner wall of the lower end of the chemical reagent bubble tank 18. The upper sealing membrane 19 is made of rubber and the lower sealing membrane 20 is made of plastic. The chemical reagent bubble 5 has a fan-shaped structure.

[0037] Please see Figure 2-5 A first compression spring 13 is provided between the upper end of the limiting block locking structure 8 and the inner wall of the limiting block locking structure groove 12. A magnetic block 14 is provided at the upper end of the limiting block locking structure 8, and a support block 24 is provided at the lower end of the limiting block locking structure 8. The support block 24 and the magnetic block 14 have the same size, and the lower end face of the support block 24 is in contact with the lower screw 2. A drive rod 22 is provided at the middle position of the limiting block locking structure 8, and the drive rod 22 is fixedly connected to the magnetic block 14 and the support block 24 respectively. One end of the push block 23 extends into the interior of the second limiting block groove 11. The push block 23 has an isosceles trapezoidal structure, and the width of the end of the push block 23 near the drive rod 22 is greater than the other end. The drive block 16 has an isosceles trapezoidal structure, and the push block 23 is in contact with the drive block 16. The width of the end of the drive block 16 near the limiting block 9 is greater than the other end. The upper and lower ends of the limiting block 9 are symmetrically provided with protrusions, and a second tension spring 15 is provided between the rear side of the protrusion and the inner wall of the second limiting block groove 11. The two sides of the sliding rod groove 6 are symmetrically provided with first limiting block grooves 10, and the first limiting block grooves 10 are rectangular grooves. One end of the limiting block 9 extends into the interior of the first limiting block groove 10, and the limiting block 9 is in contact with the inner wall of the first limiting block groove 10.

[0038] Please see Figure 4 The upper end of the nut 3 is provided with a bolt hole 17, which is located above the chemical reagent tank 18. The chemical reagent tank 18 is connected to the bolt hole 17. The two sides inside the nut 3 are symmetrically provided with vent pipes 21. The upper end of the vent pipe 21 is connected to the outside of the upper end of the nut 3, and the lower end of the vent pipe 21 is connected to the sliding rod groove 6. The upper end of the vent pipe 21 has a serpentine structure.

[0039] A method for using a bolt with telescopic function includes the following steps:

[0040] Step 1: Pull the lower screw 2 downwards, allowing the sliding rod 7 to slide to the lower end of the limiting block locking structure groove 12. Attract the magnet to one side of the nut 3. The magnetic force is greater than the elastic force of the first compression spring 13. Due to the magnetic force, the limiting block locking structure 8 with the magnetic block 14 moves upwards. At this time, the pushing block 23 pushes the driving block 16. When the pushing force is greater than the elastic force of the second tension spring 15, the limiting block 9 slides into the first limiting block groove 10. At this time, the vertical side of the driving block 16 is in contact with the vertical side of the upper pushing block 23. The limiting block 9 moves into the first limiting block groove 10, and the limiting block 9 achieves a fixed clamping between the upper screw 1 and the sliding rod 7.

[0041] Step 2: Insert the screwdriver into the bolt hole 17 and drive the bolt into the mounting hole until the rear end of the bolt is in contact with the rear end of the mounting hole.

[0042] Step 3: Remove the magnet. The elastic force of the first compression spring 13 causes the locking structure groove 12 of the limiting block to move downward, pushing the side of the block 23 to fit against the inclined surface of the drive block 16, thus releasing the limiting block 9.

[0043] Step 4: Press the upper screw 1 into the mounting hole to move the excess sliding rod 7 deeper into the sliding rod groove 6;

[0044] Step 5: The elastic force of the first compression spring 13 causes the vertical side of the push block 23 to fit against the vertical side of the drive block 16 below, thereby limiting the limit block 9 again and maintaining the stability of the relative position of the screw 1 and the lower screw 2.

[0045] Step 6: Press the upper sealing membrane 19 in the chemical agent bubble tank 18. The diameter of the lower sealing membrane 20 is smaller than the diameter of the upper sealing membrane 19. The hydraulic pressure of the chemical agent bubble 5 causes the lower sealing membrane 20 to break. The chemical agent enters the sliding rod groove 6. The air inside the sliding rod groove 6 is discharged through the air outlet pipe 21. After the chemical agent solidifies, the positions of the upper screw 1 and the lower screw 2 become more stable.

[0046] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A bolt with telescopic function, comprising an upper threaded rod (1), characterized in that: A nut (3) is fixedly installed above the upper screw (1), and a lower screw (2) is movably installed below the upper screw (1). A sliding rod groove (6) is provided inside the upper screw (1), and a sliding rod (7) is fixedly installed at the upper end of the lower screw (2), and the sliding rod (7) is slidably connected to the sliding rod groove (6). A limit block locking structure groove (12) is provided at the middle position of the sliding rod (7), and a limit block locking structure (8) is movably installed inside the limit block locking structure groove (12). (12) is symmetrically provided with a second limiting block groove (11) on both sides. A limiting block (9) is slidably provided inside the second limiting block groove (11). Two driving blocks (16) are provided on the upper and lower ends of the limiting block (9) near the limiting block locking structure (8). Pushing block groups are symmetrically provided on both sides of the upper end of the limiting block locking structure (8). The pushing block group includes two pushing blocks (23). A chemical agent bubble tank (18) is provided inside the nut (3). A chemical agent bubble (5) is provided inside the chemical agent bubble tank (18). The lower end of the chemical agent bubble tank (18) is connected to the middle position of the upper end of the sliding rod groove (6). An upper sealing film (19) is provided above the chemical agent bubble (5), and the upper sealing film (19) is fixedly connected to the inner wall of the chemical agent bubble tank (18). A lower sealing film (20) is provided below the chemical agent bubble (5), and the lower sealing film (20) is fixedly connected to the inner wall of the lower end of the chemical agent bubble tank (18). The upper sealing film (19) is made of rubber, and the lower sealing film (20) is made of plastic. The chemical agent bubble (5) has a fan-shaped structure. A first compression spring (13) is provided between the upper end of the limiting block locking structure (8) and the inner wall of the limiting block locking structure groove (12). A magnetic block (14) is provided at the upper end of the limiting block locking structure (8). A support block (24) is provided at the lower end of the limiting block locking structure (8). The support block (24) and the magnetic block (14) are the same size. The lower end face of the support block (24) is in contact with the lower screw (2). A drive rod (22) is provided at the middle position of the limiting block locking structure (8), and the drive rod (22) is fixedly connected to the magnetic block (14) and the support block (24) respectively. One end of the push block (23) extends into the interior of the second limiting block groove (11). The push block (23) is an isosceles trapezoidal structure, and the width of the end of the push block (23) near the drive rod (22) is greater than the other end. The drive block (16) is an isosceles trapezoidal structure, and the push block (23) and the drive block (16) are in contact. The width of the end of the drive block (16) near the limiting block (9) is greater than the other end.

2. A bolt with telescopic function according to claim 1, characterized in that: The outer surface of the lower screw (2) is provided with threads (4).

3. A bolt with telescopic function according to claim 1, characterized in that: The upper and lower ends of the limiting block (9) are symmetrically provided with protrusions, and a second tension spring (15) is provided between the rear side of the protrusion and the inner wall of the second limiting block groove (11). The two sides of the sliding rod groove (6) are symmetrically provided with first limiting block grooves (10), and the first limiting block groove (10) is a rectangular groove. One end of the limiting block (9) extends into the interior of the first limiting block groove (10), and the limiting block (9) is in contact with the inner wall of the first limiting block groove (10).

4. A bolt with telescopic function according to claim 3, characterized in that: The nut (3) has a bolt hole (17) at its upper end, and the bolt hole (17) is located above the chemical reagent bath (18), and the chemical reagent bath (18) is connected to the bolt hole (17).

5. A bolt with telescopic function according to claim 4, characterized in that: The nut (3) has symmetrical air outlet pipes (21) on both sides inside. The upper end of the air outlet pipe (21) is connected to the outside of the upper end of the nut (3), and the lower end of the air outlet pipe (21) is connected to the sliding rod groove (6). The upper end of the air outlet pipe (21) has a serpentine structure.

6. A method of using a bolt with telescopic function as described in claim 5, characterized in that, Includes the following steps: Step 1: Pull the lower screw (2) downwards and let the sliding rod (7) slide to the lower end of the locking structure groove (12) of the limiting block. Attach the magnet to one side of the nut (3). The magnetic force is greater than the elastic force of the first compression spring (13). Due to the magnetic force, the limiting block locking structure (8) with the magnetic block (14) is moved upwards. At this time, the pushing block (23) pushes the driving block (16). When the pushing force is greater than the elastic force of the second tension spring (15), the limiting block (9) slides into the first limiting block groove (10). At this time, the vertical side of the driving block (16) is in contact with the vertical side of the pushing block (23) above. The limiting block (9) moves into the first limiting block groove (10). The limiting block (9) allows the upper screw (1) and the sliding rod (7) to be fixedly clamped. Step 2: Insert the screwdriver into the bolt hole (17) and drive the bolt into the mounting hole until the rear end of the bolt fits against the rear end of the mounting hole. Step 3: Remove the magnet. The elastic force of the first compression spring (13) causes the locking structure groove (12) of the limiting block to move downward, and the side of the pushing block (23) fits against the inclined surface of the driving block (16), releasing the limiting block (9). Step 4: Press the upper screw (1) into the mounting hole to move the excess sliding rod (7) deeper into the sliding rod groove (6); Step 5: The elastic force of the first compression spring (13) causes the vertical side of the push block (23) to fit against the vertical side of the drive block (16) below, thereby limiting the limit block (9) again and maintaining the stability of the relative position of the upper screw (1) and the lower screw (2). Step 6: Press the upper sealing membrane (19) in the chemical agent bubble tank (18). The diameter of the lower sealing membrane (20) is smaller than that of the upper sealing membrane (19). The hydraulic pressure of the chemical agent bubble (5) causes the lower sealing membrane (20) to break. The chemical agent enters the sliding rod groove (6). The air inside the sliding rod groove (6) is discharged through the air outlet pipe (21). After the chemical agent solidifies, the positions of the upper screw (1) and the lower screw (2) become more stable.

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