Combined screw

Abstract

The utility model relates to the technical field of fasteners, and discloses a combined screw which comprises a screw body, an extension assembly is arranged in the screw body, the extension assembly comprises an extension nail, a disc fixedly arranged above the extension nail, protruding blocks fixedly arranged on the left side and the right side of the disc and a fixing assembly located in the screw body, and the diameter of the extension nail is smaller than that of the screw body. A through groove matched with the disc and the protruding block is formed in the bottom wall of the screw, a movable groove communicated with the through groove is formed in the screw, and the protruding block is fixed to the screw through a fixing assembly after being inserted into the through groove and the movable groove. The screw has the beneficial effect of preventing the internal cavity of a cavity part from being broken, and solves the problem that when part of parts are internally provided with cavities and traditional screws with fixed diameters and lengths are locked, the traditional screws interfere with the internal cavities of the parts, so that the cavities are broken.

Description

Technical Field

[0001] The utility model relates to the technical field of fasteners, in particular to a combined screw. Background Art

[0002] A screw is a tool that uses the physics and mathematics of the circular rotation of an inclined surface and friction to gradually tighten objects and parts. "Screw" is a common term for fasteners, a common colloquialism. Screws are an indispensable industrial necessity in our daily lives.

[0003] Screws are often used to fix connections between mechanical parts. During the process of fixing parts, a larger locking force is sometimes required to fix the parts, and longer screws are needed to ensure the stability of the connection. Some parts have cavities inside. When traditional screws with fixed diameter and length are locked, it will cause interference with the internal cavity of the part, resulting in the problem of breaking the cavity. Utility Model Content

[0004] The purpose of the present utility model is to provide a combined screw to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a combined screw, comprising a screw, characterized in that: an extension component is provided inside the screw, the extension component comprising an extension nail, a disc fixedly arranged above the extension nail, protrusions fixedly arranged on the left and right sides of the disc, and a fixing component located inside the screw, the diameter of the extension nail is smaller than the diameter of the screw, a through groove matching the disc and the protrusion is provided on the bottom wall of the screw, a movable groove penetrating the through groove is provided inside the screw, and the protrusion is fixed to the screw through the fixing component after being inserted into the through groove and the movable groove.

[0006] Preferably, magnets are fixedly provided on both the front and rear side walls of the protrusion. After the protrusion is inserted into the movable slot and rotated 90°, the magnets are magnetically connected to the side walls of the movable slot, and the bottom wall of the protrusion is in contact with the bottom wall of the movable slot.

[0007] Preferably, the fixing assembly includes a clamping column and a threaded column. A threaded hole is provided on the top wall of the screw, and a through hole that penetrates the movable groove is provided on the bottom wall of the threaded hole. The clamping column is located inside the through hole. After the threaded column is screwed into the threaded hole, the clamping column is fixedly connected to the disc.

[0008] Preferably, a guide bar is fixedly provided on the pressing column, a guide groove with a threaded hole penetrating therethrough and matching the guide bar is provided on the side wall of the through hole, and the guide bar is inserted into the guide groove and is in contact with the screw.

[0009] Preferably, an elastic pad is fixedly provided below the compression column, and after the threaded column is screwed into the threaded hole, the elastic pad is fixedly provided between the compression column and the disc.

[0010] Preferably, a cross slot A is provided on the top wall of the screw, and a cross slot B is provided on the top wall of the threaded column. After the threaded column is screwed into the threaded hole, the cross slot A and the cross slot B are overlapped.

[0011] Preferably, the diameter of the threaded column is larger than the diameter of the compression column.

[0012] The beneficial effects of the present invention are as follows: when assembling the present invention, the extension nail is placed under the screw, the disc and the protrusion are aligned and inserted into the through slot and the movable slot, when the protrusion is located inside the movable slot, the protrusion is rotated 90 degrees so that the magnet is magnetically connected to the side wall of the movable slot, and the extension nail is initially fixed to prevent it from rotating at will, and the bottom wall of the protrusion will be in conflict with the bottom wall of the movable slot, and the clamping post is inserted into the through hole so that the elastic pad is in conflict with the disc, and the threaded post is screwed into the threaded hole to squeeze the clamping post, and the clamping post squeezes the elastic pad and the disc, so that the protrusion is pressed against the bottom wall of the movable slot and fixedly connected to the screw, and then the extension nail is fixedly connected to the screw, completing the present invention. Type assembly; when the utility model is used, the part to be locked is placed above the cavity part, the cavity part is provided with a stepped screw hole avoiding the cavity, and the part to be locked is provided with a through hole coinciding with the stepped screw hole. The screw and the extension nail are inserted into the through hole and then screwed into the stepped screw hole, so that the part to be locked can be locked on the cavity part, and at the same time, the internal cavity of the cavity part can be avoided, thereby preventing the cavity from being broken; in summary, the utility model has the beneficial effect of preventing the internal cavity of the cavity part from being broken, and solves the problem that some parts have cavities inside, and traditional screws with fixed diameters and lengths interfere with the internal cavity of the part when locking, thereby causing the cavity to be broken. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Attachment Figure 1 It is a structural diagram of the utility model;

[0014] Attachment Figure 2 It is an exploded view of the utility model;

[0015] Attachment Figure 3 It is a cross-sectional view of the utility model;

[0016] Attachment Figure 4 It is a front view of the utility model;

[0017] Attachment Figure 5 For attachment Figure 4 Cross-sectional view at AA in the middle;

[0018] Attachment Figure 6 This is a schematic diagram of the practical application of the present utility model.

[0019] In the figure: screw 1, extension nail 2, disc 3, protrusion 4, through slot 5, clamping column 6, threaded column 7, threaded hole 8, through hole 9, guide strip 10, guide slot 11, elastic pad 12, cross slot A 13, cross slot B 14, movable slot 15, magnet 16, part to be locked 17, cavity part 18. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0021] like Figure 1-6 As shown, the utility model discloses a combined screw, including a screw 1, an extension component is provided inside the screw 1, the extension component includes an extension nail 2, a disk 3 fixedly arranged above the extension nail 2, protrusions 4 fixedly arranged on the left and right sides of the disk 3, and a fixing component located inside the screw 1, the diameter of the extension nail 2 is smaller than the diameter of the screw 1, a through groove 5 matching the disk 3 and the protrusion 4 is provided on the bottom wall of the screw 1, a movable groove 15 penetrating the through groove 5 is provided inside the screw 1, and the protrusion 4 is fixed to the screw 1 through the fixing component after being inserted into the through groove 5 and the movable groove 15. When assembling the present invention, place the extension nail 2 under the screw 1, align the disc 3 and the protrusion 4 and insert them through the groove 5 and the movable groove 15. When the protrusion 4 is located inside the movable groove 15, rotate the protrusion 4 90 degrees so that the magnet 16 is magnetically connected to the side wall of the movable groove 15, preliminarily fixing the extension nail 2 to prevent it from rotating at will. The bottom wall of the protrusion 4 will be in conflict with the bottom wall of the movable groove 15. After inserting the clamping column 6 through the hole 9, the elastic pad 12 will be in conflict with the disc 3. The threaded column 7 is screwed into the threaded hole 8 to squeeze the clamping column 6. The clamping column 6 squeezes the elastic pad 12 and the disc 3, thereby pressing the protrusion 4 on the bottom wall of the movable groove 15 and fixing it with the screw 1, thereby fixing the extension nail 2 with the screw 1, completing the present invention. Assembly of the utility model; when the utility model is used, the part to be locked 17 is placed above the cavity part 18, and a stepped screw hole that avoids the cavity is opened on the cavity part 18, and a through hole that coincides with the stepped screw hole is opened on the part to be locked 17. After the screw 1 and the extension nail 2 are inserted into the through hole, they are screwed into the stepped screw hole, so that the part to be locked 17 can be locked on the cavity part 18, and at the same time, the internal cavity of the cavity part 18 can be avoided, thereby preventing the cavity from being broken; in summary, the utility model has the beneficial effect of preventing the internal cavity of the cavity part 18 from being broken, and solves the problem that some parts have a cavity inside, and the traditional screw 1 with a fixed diameter and length interferes with the internal cavity of the part when locking, thereby causing the cavity to be broken.

[0022] Preferably, magnets 16 are fixedly mounted on both the front and rear side walls of the projection 4. After the projection 4 is inserted into the movable slot 15 and rotated 90°, the magnets 16 are magnetically connected to the side walls of the movable slot 15, and the bottom wall of the projection 4 is in contact with the bottom wall of the movable slot 15. Since the magnets 16 are magnetically connected to the side walls of the movable slot 15 after the projection 4 is inserted into the movable slot 15 and rotated 90°, this serves to initially secure the extension nail 2 and prevent it from rotating freely. Since the bottom wall of the projection 4 is in contact with the bottom wall of the movable slot 15, the projection 4 is stuck in the movable slot 15, preventing the projection 4 from falling out.

[0023] Preferably, the fixing assembly includes a compression post 6 and a threaded post 7. A threaded hole 8 is formed on the top wall of the screw 1. A through hole 9 is formed on the bottom wall of the threaded hole 8 and is communicated with the movable groove 15. The compression post 6 is located inside the through hole 9. After the threaded post 7 is screwed into the threaded hole 8, the compression post 6 is fixedly connected to the disc 3. Since the compression post 6 is fixedly connected to the disc 3 after the threaded post 7 is screwed into the threaded hole 8, the threaded post 7 squeezes the compression post 6, and the compression post 6 squeezes the disc 3, thereby pressing the protrusion 4 against the bottom wall of the movable groove 15 and fixing it to the screw 1, thereby fixing the extension nail 2.

[0024] Preferably, a guide bar 10 is fixedly provided on the compression column 6, and a guide groove 11 is formed on the side wall of the through hole 9, which penetrates the threaded hole 8 and matches the guide bar 10. The guide bar 10 is inserted into the guide groove 11 and is in contact with the screw 1. Since the guide bar 10 is inserted into the guide groove 11 and is in contact with the screw 1, it plays a role in guiding the compression column 6 when it is squeezed and moved.

[0025] Preferably, an elastic pad 12 is fixedly provided below the pressing column 6, and after the threaded column 7 is screwed into the threaded hole 8, the elastic pad 12 is fixedly provided between the pressing column 6 and the disc 3. Since the elastic pad 12 is fixedly provided between the pressing column 6 and the disc 3 after the threaded column 7 is screwed into the threaded hole 8, it plays a role in preventing the disc 3 from being crushed.

[0026] Preferably, a cross slot A13 is formed on the top wall of the screw 1, and a cross slot B14 is formed on the top wall of the threaded column 7. After the threaded column 7 is screwed into the threaded hole 8, the cross slot A13 and the cross slot B14 overlap. Since the cross slot A13 and the cross slot B14 overlap after the threaded column 7 is screwed into the threaded hole 8, it is convenient to use a tool to rotate the screw 1 and the threaded column 7.

[0027] Preferably, the diameter of the threaded column 7 is larger than the diameter of the pressing column 6. Since the diameter of the threaded column 7 is larger than the diameter of the pressing column 6, the pressure application area is increased.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A combined screw, comprising a screw (1), characterized in that: An extension component is provided inside the screw (1), the extension component comprising an extension nail (2), a disc (3) fixedly arranged above the extension nail (2), protrusions (4) fixedly arranged on the left and right sides of the disc (3), and a fixing component located inside the screw (1); the diameter of the extension nail (2) is smaller than the diameter of the screw (1); a through groove (5) matching the disc (3) and the protrusion (4) is provided on the bottom wall of the screw (1); a movable groove (15) penetrating the through groove (5) is provided inside the screw (1); and the protrusion (4) is inserted into the through groove (5) and the movable groove (15) and fixed to the screw (1) through the fixing component.

2. A combined screw according to claim 1, characterized in that: Magnets (16) are fixedly arranged on both the front and rear side walls of the protrusion (4); after the protrusion (4) is inserted into the movable groove (15) and rotated 90 degrees, the magnets (16) are magnetically connected to the side walls of the movable groove (15); and the bottom wall of the protrusion (4) is in contact with the bottom wall of the movable groove (15).

3. A combined screw according to claim 2, characterized in that: The fixing assembly comprises a clamping column (6) and a threaded column (7); a threaded hole (8) is provided on the top wall of the screw (1); a through hole (9) which is connected to the movable groove (15) is provided on the bottom wall of the threaded hole (8); the clamping column (6) is located inside the through hole (9); after the threaded column (7) is screwed into the threaded hole (8), the clamping column (6) is fixedly connected to the disc (3).

4. A combined screw according to claim 3, characterized in that: A guide bar (10) is fixedly provided on the clamping column (6), and a guide groove (11) penetrating the threaded hole (8) and matching the guide bar (10) is provided on the side wall of the through hole (9); the guide bar (10) is inserted into the guide groove (11) and is in contact with the screw (1).

5. A combined screw according to claim 4, characterized in that: An elastic pad (12) is fixedly arranged below the clamping column (6); after the threaded column (7) is screwed into the threaded hole (8), the elastic pad (12) is fixedly arranged between the clamping column (6) and the disc (3).

6. A combined screw according to claim 5, characterized in that: A cross groove A (13) is formed on the top wall of the screw (1), and a cross groove B (14) is formed on the top wall of the threaded column (7). After the threaded column (7) is screwed into the threaded hole (8), the cross groove A (13) and the cross groove B (14) overlap.

7. A combined screw according to claim 6, characterized in that: The diameter of the threaded column (7) is greater than the diameter of the pressing column (6).

Images