Anti-falling screw

Abstract

The utility model relates to the technical field of screws, in particular to an anti-falling screw. According to the technical scheme, the screw comprises a screw rod and further comprises a screw head fixedly connected to one end of the screw rod, inner through grooves are formed in the screw head and the screw rod, through holes are formed in the two sides of the screw rod, and the through holes are communicated with the inner through grooves. According to the connecting device, the limiting rod abuts against the side edge of the clamping connecting device, the screw rod is prevented from falling off, and the fixing stability is improved.

Description

Technical Field

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

[0002] Screws are parts widely used to fix objects. Traditional screws are composed of a screw body and a screw head. The surface of the screw body is provided with screw threads, and the screw head is provided with straight lines as the fulcrum during rotation.

[0003] Screws are usually fixed by turning nuts to adapt their own threads to screw holes. However, the threads often become stripped due to external factors such as vibration and impact, eventually causing the screws to fall off, affecting the fixing effect on the object. The stability is poor and there are certain safety hazards. Therefore, the present application proposes a screw that prevents it from falling off. Summary of the invention

[0004] The utility model aims to provide a screw that prevents screws from falling off, aiming at the problem that threads are easily stripped, resulting in screws falling off and poor stability in the background art.

[0005] The technical solution of the utility model is: an anti-falling screw, comprising a screw rod, and also comprising:

[0006] A screw head fixedly connected to one end of the screw rod, wherein the screw head and the screw rod are provided with inner through grooves, and through holes are provided on both sides of the screw rod, and the through holes are connected to the inner through grooves;

[0007] A position-limiting anti-dropping component, which is arranged in the inner through slot to prevent the screw from loosening and falling off;

[0008] An impact device is arranged in the inner through groove and is used for driving the position limiting and anti-dropping component.

[0009] Optionally, a strong glue is provided on the outer wall of the screw head, a waterproof rubber sleeve is fixed on the surface of the strong glue, and a rubber gasket is connected to the outer wall of the bottom end of the screw head.

[0010] Optionally, the limit anti-slip assembly includes a trapezoidal sliding block slidably mounted on both sides of the bottom wall of the inner through groove, a return spring is fixedly mounted on one side of the trapezoidal sliding block, a limit rod is connected to the return spring, and the limit rod is located in the through hole.

[0011] Optionally, the impact device includes a bolt head arranged at the upper end of the inner through groove, the bottom end of the bolt head is connected to a moving rod, a connecting ring is installed on the moving rod, and a striking rod is connected to the connecting ring.

[0012] Optionally, the movable rod and the bolt head are connected by a movable shaft, and the upper end of the inner through groove is provided with an internal thread matching the bolt head.

[0013] Optionally, a rotating shaft is installed on the top of the bolt head, and a screw cap is fixedly connected to the top of the rotating shaft.

[0014] Compared with the prior art, the utility model has the following beneficial technical effects:

[0015] 1. By setting a trapezoidal sliding block, a limit rod, a reset spring, a movable shaft, a moving rod, a hitting rod and a bolt head, the screw cap is turned to rotate the rotating shaft, so that the bolt head is tightened in conjunction with the internal thread. Under the action of the movable shaft, the moving rod can drive the hitting rod to move downward, squeeze and hit the inclined surface of the trapezoidal sliding block, so that the trapezoidal sliding block drives the limit rod to move outward, so that the limit rod is against the side of the clamping connection device, thereby preventing the screw rod from falling off and improving the fixing stability.

[0016] 2. By setting rubber gaskets, super glue and waterproof rubber sleeves, when the adjustment screw is screwed into the screw hole as a whole, the waterproof rubber sleeve and the rubber gasket fit the surface of the workpiece to cover the screw hole, thereby blocking external water from entering and preventing water from directly penetrating into the screw hole and causing the screw to rust.

[0017] The utility model enables the limiting rod to abut against the side of the clamping connection device, thus preventing the screw rod from falling off and improving the fixing stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A structural schematic diagram of an embodiment of the utility model is given;

[0019] Figure 2 A schematic diagram of the internal structure of the inner through groove of an embodiment of the utility model is given;

[0020] Figure 3 A schematic diagram of a rubber gasket connection structure of an embodiment of the utility model is given;

[0021] Figure 4 A schematic diagram of a limit rod connection structure of an embodiment of the utility model is given.

[0022] Figure numerals: 1. screw rod; 2. screw head; 3. internal through groove; 4. through hole; 5. bolt head; 6. moving rod; 7. connecting ring; 8. impact rod; 9. trapezoidal sliding block; 10. reset spring; 11. limit rod; 12. movable shaft; 13. internal thread; 14. rotating shaft; 15. screw cap; 16. rubber gasket; 17. super glue; 18. waterproof rubber sleeve. DETAILED DESCRIPTION

[0023] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all of the embodiments.

[0024] The components of the embodiments of the present invention generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0025] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.

[0026] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0027] It should be noted that the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] Example

[0030] like Figure 1 and Figure 2 As shown, the utility model provides an anti-falling screw, comprising a screw rod 1, and a screw head 2 fixedly connected to one end of the screw rod 1, wherein the outer surface of the screw rod 1 is provided with a thread, and the thread of the screw rod 1 and the screw hole are tightened by twisting the screw head 2 to complete the fixed connection of the object;

[0031] In addition, inner through grooves 3 are provided inside the screw head 2 and the screw rod 1, and through holes 4 are provided on both sides of the screw rod 1. The through holes 4 are connected to the inner through grooves 3, and the through holes 4 provide the prerequisite working conditions for preventing the screw from falling off.

[0032] like Figure 1 and Figure 3 As shown, a strong glue 17 is provided on the outer wall of the screw head 2, a waterproof rubber sleeve 18 is fixed on the surface of the strong glue 17, and a rubber gasket 16 is connected to the outer wall of the bottom end of the screw head 2. When the adjustment screw is screwed into the screw hole as a whole, the waterproof rubber sleeve 18 cooperates with the rubber gasket 16 to fit the surface of the workpiece and cover the screw hole, thereby blocking external water from entering and preventing water from directly penetrating into the interior of the screw hole and causing rust on the screw.

[0033] like Figure 2 and Figure 4 As shown, the device also includes a limit anti-slip assembly, which is arranged in the inner through groove 3 to prevent the screw from loosening and falling off. The limit anti-slip assembly includes a trapezoidal sliding block 9 slidably installed on both sides of the bottom wall of the inner through groove 3, and a reset spring 10 is fixedly installed on one side of the trapezoidal sliding block 9. A limit rod 11 is connected to the reset spring 10. The limit rod 11 is located in the through hole 4. The limit rod 11 can be moved by the sliding of the trapezoidal sliding block 9, so that the limit rod 11 moves out of the through hole 4 and abuts against the side of the clamping connection device, thereby preventing the screw rod 1 from falling off.

[0034] like Figure 2 As shown, the screw also includes an impact device, which is arranged in the inner through slot 3 for driving the limit anti-slip assembly. The impact device includes a bolt head 5 arranged at the upper end of the inner through slot 3, and the bottom end of the bolt head 5 is connected to a moving rod 6, on which a connecting ring 7 is installed, and a top hitting rod 8 is connected to the connecting ring 7. The top hitting rod 8 can be moved by moving the moving rod 6, so that the top hitting rod 8 hits the oblique end surfaces of the two trapezoidal sliding blocks 9, so that the two trapezoidal sliding blocks 9 slide outward, and at the same time, the limit rod 11 moves outward;

[0035] Furthermore, the movable rod 6 and the bolt head 5 are connected by a movable shaft 12, and the movable shaft 12 can transmit force and torque. When the bolt head 5 rotates, it is transmitted to the movable rod 6 through the movable shaft 12, thereby realizing power transmission between the two. The upper end of the inner through groove 3 is provided with an internal thread 13 matching the bolt head 5. When the bolt head 5 is rotated, the internal thread 13 is tightened. Through the connection of the movable shaft 12, the movable rod 6 can be moved up and down, driving the impact rod 8 to move by impact.

[0036] Furthermore, a rotating shaft 14 is installed on the top of the bolt head 5, and a screw cap 15 is fixedly connected to the top of the rotating shaft 14. Twisting the screw cap 15 can rotate the rotating shaft 14 to drive the bolt head 5 to be tightened and rotated more conveniently, easily and labor-savingly.

[0037] Working principle: When the screw head 2 is turned and rotated, the threads on the screw rod 1 and the screw hole threads are tightened, and then the screw cap 15 is turned to rotate the shaft 14. The rotation of the shaft 14 drives the bolt head 5 to rotate, and cooperates with the internal thread 13 to rotate and tighten the bolt head 5. Under the action of the movable shaft 12, when the bolt head 5 is rotated and tightened, the moving rod 6 can drive the impact rod 8 to move downward, so that the impact rod 8 hits the inclined end surfaces of the two trapezoidal sliding blocks 9, causing the two trapezoidal sliding blocks 9 to slide outward. The limit rod 11 moves out of the through hole 4 and compresses the return spring 10, so that the limit rod 11 abuts against the side of the clamping connection device to prevent the screw rod 1 from falling off. When disassembly is required, it is only necessary to reverse the screw cap 15 to loosen the bolt head 5 and move the top rod 8 upward. At this time, the trapezoidal sliding block 9 is no longer subjected to the extrusion force, and the return spring 10 extends and resets, driving the trapezoidal sliding block 9 to move inward, so that the limit rod 11 extends back into the through hole 4, which is easy and labor-saving while preventing the screw from falling off.

[0038] The above-mentioned specific embodiments are only several optional embodiments of the present invention. Based on the technical solution of the present invention and the relevant inspiration of the above-mentioned embodiments, those skilled in the art can make various alternative improvements and combinations to the above-mentioned specific embodiments.

Claims

1. An anti-drop screw, comprising a screw rod (1), characterized in that: Also includes: A screw head (2) is fixedly connected to one end of the screw rod (1), the screw head (2) and the screw rod (1) are both provided with inner through grooves (3), through holes (4) are provided on both sides of the screw rod (1), and the through holes (4) are connected to the inner through grooves (3); A position-limiting anti-dropping component, the position-limiting anti-dropping component is arranged in the inner through groove (3) to prevent the screw from loosening and falling off; An impact device is arranged in the inner through groove (3) and is used for driving the position limiting and anti-dropping component.

2. The anti-falling screw according to claim 1, characterized in that: A strong glue (17) is provided on the outer wall of the screw head (2), a waterproof rubber sleeve (18) is fixed on the surface of the strong glue (17), and a rubber gasket (16) is connected to the outer wall of the bottom end of the screw head (2).

3. The anti-falling screw according to claim 1, characterized in that: The limit anti-slip assembly comprises a trapezoidal sliding block (9) slidably mounted on both sides of the bottom wall of the inner through groove (3); a return spring (10) is fixedly mounted on one side of the trapezoidal sliding block (9); a limit rod (11) is connected to the return spring (10); and the limit rod (11) is located in the through hole (4).

4. The anti-falling screw according to claim 1, characterized in that: The impact device comprises a bolt head (5) arranged at the upper end of the inner through groove (3); the bottom end of the bolt head (5) is connected to a moving rod (6); a connecting ring (7) is installed on the moving rod (6); and a striking rod (8) is connected to the connecting ring (7).

5. The anti-falling screw according to claim 4, characterized in that: The moving rod (6) and the bolt head (5) are matched and connected via a movable shaft (12), and the upper end of the inner through groove (3) is provided with an internal thread (13) matching the bolt head (5).

6. The anti-falling screw according to claim 4, characterized in that: A rotating shaft (14) is installed on the top of the bolt head (5), and a screw cap (15) is fixedly connected to the top of the rotating shaft (14).

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