Fastening screw with adjustable pressure

Abstract

The utility model discloses a pressure-adjustable fastening screw which comprises a screw rod, the top end of the screw rod is fixedly connected with a screw head, and a nut is arranged at the bottom end outside the screw rod. According to the pressure-adjustable fastening screw, the spring, the limiting sliding block and the guide rail are arranged, the nut abuts against the bottom ends of two parts, when the pressure of the spring needs to be adjusted, the nut is rotated, and the nut ascends outside the screw rod to enable the baffle to abut against the bottom end of the second connecting plate to enable the second connecting plate to ascend; a second connecting plate ascends to extrude a spring to adjust the pressure of the spring, so that a part can be fixed, a fastening screw is prevented from loosening and sliding off in the use process, a limiting sliding block can rotate in a guide rail when a screw rod rotates, the limiting sliding block and the guide rail can reduce friction between the first connecting plate and the second connecting plate, and the service life of the part is prolonged. The problems that in the using process, loosening and slipping are likely to happen, and using of parts is likely to be affected are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of screws, in particular to a fastening screw with adjustable pressure. Background Art

[0002] Screws can fix two parts together and play a tightening role. When in use, screws are an indispensable industrial necessity in daily life. The application field of fastening screws is very wide. They can be used in automobiles, bicycles, and various machine tools. Traditional fastening screws are easy to loosen and slip during use, which can easily affect the use of parts.

[0003] Therefore, we propose a new type of adjustable pressure fastening screw to improve the above-mentioned problems. Utility Model Content

[0004] The utility model aims to provide a fastening screw with adjustable pressure, so as to solve the problem in the above background technology that the fastening screw is easy to loosen and slip during use, which easily affects the use of parts.

[0005] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: a fastening screw with adjustable pressure, comprising a screw rod, the top end of the screw rod is fixedly connected to a screw head, the bottom end of the outside of the screw rod is provided with a nut, the bottom end of the outside of the screw rod is movably connected to a baffle, the top end of the baffle is provided with a second connecting plate, the bottom end of the screw head is provided with a first connecting plate, a spring is fixedly connected between the second connecting plate and the first connecting plate, the first connecting plate and the second connecting plate are respectively provided with mounting grooves, the top end of the baffle and the bottom end of the screw head are respectively provided with guide rails, and the two sides of the bottom end of the first connecting plate and the two sides of the bottom end of the second connecting plate are respectively fixedly connected to limit sliders.

[0006] Preferably, the limit slider is arranged inside the guide rail, and the limit slider rotates inside the guide rail.

[0007] Preferably, both sides of the bottom end of the first connecting plate are fixedly connected to limiting sleeves, both sides of the top end of the second connecting plate are fixedly connected to limiting sleeve rods, the top end of the limiting sleeve rods is fixedly connected to the limiting plate, and limiting sliding grooves are provided on both sides of the inside of the limiting sleeve.

[0008] Preferably, the limiting sleeve is sleeved on the outside of the limiting sleeve rod, and both sides of the limiting plate slide up and down inside the limiting sliding groove.

[0009] Preferably, a reserved groove is provided at the top of the screw head, a cross groove is provided at the bottom of the reserved groove, a limiting block is fixedly connected at the corner of the reserved groove, a hexagonal block is arranged inside the reserved groove, and a limiting groove is provided at the corner of the bottom end of the hexagonal block.

[0010] Preferably, the limiting block is embedded in the limiting groove, and the hexagonal block is installed in the reserved groove through the friction force between the limiting block and the limiting groove.

[0011] Compared with the prior art, the utility model has the beneficial effects that: the adjustable pressure fastening screw not only facilitates the adjustment of the screw pressure and improves the stability of the spring, but also facilitates the disassembly and installation of the screw;

[0012] (1) A spring, a first connecting plate, a mounting groove, a second connecting plate, a limit slider and a guide rail are provided, and a screw rod is screwed into the interior of two parts, and a nut is pressed against the bottom ends of the two parts. When the pressure of the spring needs to be adjusted, the nut is rotated, and the nut rises outside the screw rod so that the baffle plate presses against the bottom end of the second connecting plate to raise the second connecting plate. When the second connecting plate rises, the spring can be squeezed to adjust the pressure of the spring, thereby fixing the parts and preventing the fastening screws from loosening and falling during use. When the screw rod rotates, the limit slider will rotate inside the guide rail, and the limit slider and the guide rail can reduce the friction between the first connecting plate and the second connecting plate;

[0013] (2) By providing a limiting sleeve rod, a limiting sleeve, a limiting plate and a limiting slide groove, the limiting sleeve rod will slide inside the limiting sleeve when the spring is squeezed, thereby improving the stability of the spring. The limiting plate at the top end of the limiting sleeve rod is arranged inside the limiting slide groove, which can limit the spring and prevent the second connecting plate at the bottom end of the spring from accidentally detaching from the bottom end of the screw rod, thereby further improving the stability of the spring;

[0014] (3) A hexagonal block, a cross slot, a limit block and a limit slot are provided. The hexagonal block is installed inside the screw head through the limit block and the limit slot. When the screw head and the screw rod need to be rotated, a wrench is used to rotate the hexagonal block. The hexagonal block can drive the screw rod to rotate through the screw head to install and disassemble the screw rod. When a screwdriver is used without a wrench, the hexagonal block is taken out of the reserved slot, so that the cross slot can be exposed. The hexagonal block is arranged inside the reserved slot to prevent the cross slot from being blocked by impurities. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a front view cross-sectional structural schematic diagram of the utility model;

[0016] Figure 2 It is a schematic diagram of an enlarged cross-sectional top view of the screw head of the utility model;

[0017] Figure 3 This is a schematic diagram of a partial cross-section enlarged structure of a limiting sleeve of the utility model;

[0018] Figure 4 For the utility model Figure 1 Schematic diagram of the enlarged cross-section structure at point A in the middle.

[0019] In the figure: 1. screw rod; 2. nut; 3. limit sleeve rod; 4. spring; 5. first connecting plate; 6. screw head; 7. hexagonal block; 8. mounting groove; 9. limit sleeve; 10. second connecting plate; 11. baffle; 12. cross groove; 13. limit block; 14. limit groove; 15. limit plate; 16. limit slide groove; 17. limit slide block; 18. guide rail. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Example 1: Please refer to Figure 1-4 , a fastening screw with adjustable pressure, comprising a screw rod 1, a screw head 6 is fixedly connected to the top of the screw rod 1, a nut 2 is arranged at the bottom of the screw rod 1, a baffle 11 is movably connected to the bottom of the screw rod 1, a second connecting plate 10 is arranged at the top of the baffle 11, a first connecting plate 5 is arranged at the bottom of the screw head 6, a spring 4 is fixedly connected between the second connecting plate 10 and the first connecting plate 5, mounting grooves 8 are respectively provided inside the first connecting plate 5 and the second connecting plate 10, guide rails 18 are respectively provided at the top of the baffle 11 and the bottom of the screw head 6, and both sides of the bottom end of the first connecting plate 5 and the bottom end of the second connecting plate 10 are respectively fixedly connected to limit sliders 17;

[0022] The limit slider 17 is arranged inside the guide rail 18, and the limit slider 17 rotates inside the guide rail 18;

[0023] Specifically, Figure 1 and Figure 4As shown, the screw rod 1 is screwed into the interior of the two components, and the nut 2 is against the bottom ends of the two components. When the pressure of the spring 4 needs to be adjusted, the nut 2 is rotated, and the nut 2 rises outside the screw rod 1 so that the baffle 11 is against the bottom end of the second connecting plate 10 to make the second connecting plate 10 rise. When the second connecting plate 10 rises, the spring 4 can be squeezed to adjust the pressure of the spring 4, so that the components can be fixed to prevent the fastening screws from loosening and falling during use. When the screw rod 1 rotates, the limit slider 17 will rotate inside the guide rail 18, and the limit slider 17 and the guide rail 18 can reduce the friction between the first connecting plate 5 and the second connecting plate 10.

[0024] Embodiment 2: The two sides of the bottom end of the first connecting plate 5 are fixedly connected to the limiting sleeve 9, the two sides of the top end of the second connecting plate 10 are fixedly connected to the limiting sleeve rod 3, the top end of the limiting sleeve rod 3 is fixedly connected to the limiting plate 15, the limiting sleeve 9 is provided with limiting grooves 16 on both sides, the limiting sleeve 9 is sleeved on the outside of the limiting sleeve rod 3, and the two sides of the limiting plate 15 slide up and down inside the limiting grooves 16;

[0025] Specifically, Figure 1 and Figure 3 As shown, when the spring 4 is squeezed, the limiting sleeve rod 3 will slide inside the limiting sleeve 9, thereby improving the stability of the spring 4. The limiting plate 15 at the top of the limiting sleeve rod 3 is arranged inside the limiting slide groove 16, which can limit the spring 4 and prevent the second connecting plate 10 at the bottom end of the spring 4 from accidentally detaching from the bottom end of the screw rod 1, thereby further improving the stability of the spring 4.

[0026] Embodiment 3: A reserved groove is provided at the top of the screw head 6, a cross groove 12 is provided at the bottom of the reserved groove, a limiting block 13 is fixedly connected at the corner of the reserved groove, a hexagonal block 7 is provided inside the reserved groove, a limiting groove 14 is provided at the corner of the bottom end of the hexagonal block 7, the limiting block 13 is embedded in the limiting groove 14, and the hexagonal block 7 is installed in the reserved groove by the friction between the limiting block 13 and the limiting groove 14;

[0027] Specifically, Figure 1 and Figure 2 As shown, the hexagonal block 7 is installed inside the screw head 6 through the limit block 13 and the limit groove 14. When the screw head 6 and the screw rod 1 need to be rotated, the hexagonal block 7 is rotated with a wrench. The hexagonal block 7 can drive the screw rod 1 to rotate through the screw head 6 to install and disassemble the screw rod 1. When there is no wrench and a screwdriver is used, the hexagonal block 7 is taken out from the inside of the reserved groove, so that the cross groove 12 can leak out. The hexagonal block 7 is arranged inside the reserved groove to prevent the cross groove 12 from being blocked by impurities.

[0028] Working principle: when the utility model is in use, the hexagonal block 7 is installed inside the screw head 6 through the limit block 13 and the limit groove 14. When the screw head 6 and the screw rod 1 need to be rotated, the hexagonal block 7 is used to be rotated with a wrench. The hexagonal block 7 can drive the screw rod 1 to rotate through the screw head 6 to install and disassemble the screw rod 1. When there is no wrench and a screwdriver is used, the hexagonal block 7 is taken out from the inside of the reserved groove, so that the cross groove 12 can be exposed. The leakage of the cross groove 12 can facilitate the use of a screwdriver to rotate the screw head 6 and the screw rod 1, and the screw rod 1 is screwed into the interior of the two components. The nut 2 is against the bottom ends of the two components. When the pressure of the spring 4 needs to be adjusted, the nut 2 is rotated, and the nut 2 rises on the outside of the screw rod 1 to make the baffle 11 against the bottom end of the second connecting plate 10 to make the second connecting plate 10 rise. The rise of the second connecting plate 10 can adjust the spring 4 by squeezing. The pressure of the spring 4 can fix the parts and prevent the fastening screws from loosening and slipping during use. When the screw rod 1 rotates, the limit slider 17 will rotate inside the guide rail 18. The limit slider 17 and the guide rail 18 can reduce the friction of the first connecting plate 5 and the second connecting plate 10. When the spring 4 is squeezed, the limit sleeve 3 will slide inside the limit sleeve 9, thereby improving the stability of the spring 4. The limit plate 15 at the top of the limit sleeve 3 is arranged inside the limit slide groove 16, which can limit the spring 4 and prevent the second connecting plate 10 at the bottom of the spring 4 from accidentally detaching from the bottom end of the screw rod 1, thereby further improving the stability of the spring 4. After installation, the hexagonal block 7 is installed inside the screw head 6 through the limit block 13 and the limit groove 14. The hexagonal block 7 is arranged inside the reserved groove to prevent the cross groove 12 from being blocked by impurities.

[0029] It is obvious 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 present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A fastening screw with adjustable pressure, comprising a screw rod (1), characterized in that: The top end of the screw rod (1) is fixedly connected to a screw head (6), the bottom end of the outside of the screw rod (1) is provided with a nut (2), the bottom end of the outside of the screw rod (1) is movably connected to a baffle (11), the top end of the baffle (11) is provided with a second connecting plate (10), the bottom end of the screw head (6) is provided with a first connecting plate (5), a spring (4) is fixedly connected between the second connecting plate (10) and the first connecting plate (5), the inside of the first connecting plate (5) and the second connecting plate (10) are respectively provided with mounting grooves (8), the top end of the baffle (11) and the bottom end of the screw head (6) are respectively provided with guide rails (18), and both sides of the bottom end of the first connecting plate (5) and the bottom end of the second connecting plate (10) are respectively fixedly connected to limit sliders (17).

2. The adjustable pressure fastening screw according to claim 1, characterized in that: The limiting slide block (17) is arranged inside the guide rail (18), and the limiting slide block (17) rotates inside the guide rail (18).

3. The adjustable pressure fastening screw according to claim 1, characterized in that: The two sides of the bottom end of the first connecting plate (5) are fixedly connected to the limiting sleeve (9), the two sides of the top end of the second connecting plate (10) are fixedly connected to the limiting sleeve rod (3), the top end of the limiting sleeve rod (3) is fixedly connected to the limiting plate (15), and the limiting sleeve (9) has limiting sliding grooves (16) formed on the two sides thereof.

4. The adjustable pressure fastening screw according to claim 3, characterized in that: The limiting sleeve (9) is sleeved on the outside of the limiting sleeve rod (3), and the two sides of the limiting plate (15) slide up and down inside the limiting sliding groove (16).

5. The adjustable pressure fastening screw according to claim 1, characterized in that: A reserved groove is provided at the top of the screw head (6), a cross groove (12) is provided at the bottom of the reserved groove, a limiting block (13) is fixedly connected at the corner of the reserved groove, a hexagonal block (7) is provided inside the reserved groove, and a limiting groove (14) is provided at the corner of the bottom end of the hexagonal block (7).

6. The adjustable pressure fastening screw according to claim 5, characterized in that: The limiting block (13) is embedded in the limiting groove (14), and the hexagonal block (7) is installed in the reserved groove through the friction force between the limiting block (13) and the limiting groove (14).

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