Combined screw

Abstract

The utility model provides a combined screw, which relates to the technical field of screws and comprises a screw rod portion and a screw head portion, the screw head portion is welded on the upper end face of the screw rod portion, a gasket is sleeved on the screw rod portion, a movable ring block is movably clamped on the outer side face of the gasket, and an anti-skidding rubber pad is adhered on the lower end face of the gasket. The upper end of the movable ring block is connected with a limiting block through a connecting block, the limiting block is in threaded connection with a guide rod through an inner threaded hole, and the side end of the head of the screw is connected with the guide rod in a sleeved mode through a fixing block. The utility model solves the problem that the screw connection precision and stability are influenced by the deflection condition when the guide head drives the screw rod part to guide and screw in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of screw technology, specifically to a combination screw. Background Technology

[0002] Screws are tools that use the physical and mathematical principles of inclined planes, circular rotation, and friction to gradually fasten objects and machine parts. Combination screws refer to a combination of a screw, a spring washer, and a flat washer, fastened together by thread rolling. A search revealed existing technology (publication number: CN202122556917.8) for an anti-slip combination screw, which describes "this combination screw with a threadless guide head added to the front end of the flat-head screw, which guides the screw during use, reducing the difficulty of use and making it simpler and faster." However, in this existing technology, the guide head guides the screw shank, causing misalignment that affects the screw connection accuracy and stability. Utility Model Content

[0003] To overcome the shortcomings of existing technologies, a combined screw is provided to solve the problem that the misalignment that occurs when the guide head drives the screw shank to guide and screw in the existing technology affects the screw connection accuracy and stability.

[0004] To achieve the above objectives, a combined screw is provided, comprising: a screw shank and a screw head, wherein the screw head is welded to the upper end face of the screw shank.

[0005] The screw rod is fitted with a washer, and a movable ring block is movably engaged on the outer side of the washer. An anti-slip rubber pad is adhered to the lower end of the washer. A limit block is connected to the upper end of the movable ring block through a connecting block. A guide rod is screwed to the limit block through an internal threaded hole. The side end of the screw head is fitted with the guide rod through a fixing block.

[0006] Furthermore, a cross groove is provided on the upper end face of the screw head, and a washer is attached to the lower surface of the screw head.

[0007] Furthermore, the upper surface of the limiting block is provided with an internal threaded hole, and the outer end of the limiting block is welded to the movable ring block through a connecting block.

[0008] Furthermore, the lower end face of the guide rod is provided with external threads.

[0009] Furthermore, a central hole is provided on the inner side of the gasket; and the gasket is fitted and attached to the upper end face of the screw rod through the central hole.

[0010] Furthermore, an extension plate is welded to the side end of the gasket; and the extension plate is located at the lower end of the movable ring block.

[0011] The beneficial effects of this utility model are that the combined screw of this utility model uses a guide rod, washer, movable ring block, limiting block and connecting block to form a guide structure for screw installation. The screw head is sleeved on the guide rod connected to the washer, so that the screw is restricted by the guide rod when screwing in and moves horizontally in the axial direction. This helps to prevent the combined screw from deflecting during the screwing process, ensures that the combined screw is screwed into the workpiece vertically, and improves the stability of the combined screw installation. Attached Figure Description

[0012] Figure 1 This is a front view structural diagram of the combined screw according to an embodiment of the present utility model.

[0013] Figure 2 This is a front cross-sectional view of the combined screw according to an embodiment of the present invention.

[0014] Figure 3 This is a top view of the gasket structure according to an embodiment of the present invention.

[0015] Figure 4 This is a top view of the screw head according to an embodiment of the present invention.

[0016] In the diagram: 1. Screw rod; 2. Screw head; 21. Fixing block; 22. Cross groove; 3. Guide rod; 4. Washer; 41. Movable ring block; 42. Anti-slip rubber pad; 43. Extension plate; 44. Center hole; 5. Limiting block; 51. Internal threaded hole; 52. Connecting block. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Reference Figures 1 to 4 As shown, this utility model provides a combined screw, including: a screw shank 1 and a screw head 2, wherein the screw head 2 is welded to the upper end face of the screw shank 1.

[0019] A washer 4 is sleeved on the screw rod 1. A movable ring block 41 is movably engaged on the outer side of the washer 4. An anti-slip rubber pad 42 is adhered to the lower end of the washer 4. A limit block 5 is connected to the upper end of the movable ring block 41 through a connecting block 52. A guide rod 3 is screwed to the limit block 5 through an internal threaded hole 51. The side end of the screw head 2 is sleeved with the guide rod 3 through a fixing block 21.

[0020] When installing the combination screw, first screw the guide rod 3 onto the limiting block 5 on the surface of the washer 4. Press and position the washer 4 at the screwing position on the workpiece using the extension plate 42. The screw head 2 of the combination screw is then connected to the guide rod 3 via the fixing block 21. Use an electric or manual screwdriver to rotate the combination screw into the workpiece until the screw head 2 is tightly against the washer 4. Stop rotating the screw and finally remove the guide rod 3. The combination screw can then be accurately screwed in and installed.

[0021] In this embodiment, a cross groove 22 is provided on the upper end face of the screw head 2, and a washer 4 is attached to the lower surface of the screw head 2. Two sets of fixing blocks 21 are symmetrically welded to the outer end of the screw head 2; and a guide rod 3 passes through the inner side of each fixing block 21.

[0022] In a preferred embodiment, the screw shank 1, screw head 2, and washer 4 constitute a combined screw assembly, making the connection of the combined screw more secure. The cross-shaped groove 22 facilitates the rotation of the entire screw assembly using an electric or manual screwdriver. The connection structure between the washer 4 and the guide rod 3 facilitates and guides the screw insertion of the combined screw, ensuring accurate installation and improving the connection stability of the combined screw.

[0023] In this embodiment, the inner side of the upper surface of the limiting block 5 is provided with an internal threaded hole 51, and the outer end of the limiting block 5 is welded to the movable ring block 41 through a connecting block 52. The lower end of the guide rod 3 is provided with an external thread.

[0024] In a preferred embodiment, the limiting block 5 is threaded to the guide rod 3 through the internal threaded hole 51, facilitating the disassembly or installation of the guide rod 3 at the limiting block 5. The movable ring block 41 facilitates the rotation of the limiting block 5 along the side of the washer 4, following the rotation of the screw head 2. This ensures that the guide rod 3 effectively limits the deviation of the combined screw during the continuous screwing process.

[0025] In this embodiment, a central hole 44 is provided on the inner side of the gasket 4; and the gasket 4 is fitted and attached to the upper end face of the screw rod 1 through the central hole 44. An extension plate 43 is welded to the side end of the gasket 4; and the extension plate 43 is located at the lower end of the movable ring block 41.

[0026] As a preferred embodiment, the anti-slip rubber pad 42 on the lower end face of the pad 4 serves to prevent slippage and ensure proper contact, allowing the pad 4 to adhere to the smooth surface of the workpiece, increasing the friction between the pad 4 and the workpiece, and facilitating stable pressing of the pad 4 onto the workpiece surface. The extension plate 43 facilitates manual pressing of the pad 4 without affecting the normal rotation of the movable ring block 41.

[0027] This utility model of a combined screw effectively solves the problem in the prior art where the guide head drives the screw shank to guide and screw in, which affects the screw connection accuracy and stability. It helps prevent the combined screw from deflecting during the screwing process, ensuring that the combined screw is screwed vertically into the workpiece, improving the stability of the combined screw installation, and is suitable for combined screws.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A combination screw comprising: The screw rod (1) and screw head (2) are provided, wherein the screw head (2) is welded to the upper end face of the screw rod (1), characterized in that: The screw rod (1) is fitted with a washer (4), and a movable ring block (41) is movably engaged on the outer side of the washer (4). An anti-slip rubber pad (42) is adhered to the lower end of the washer (4). A limit block (5) is connected to the upper end of the movable ring block (41) through a connecting block (52). A guide rod (3) is screwed to the limit block (5) through an internal threaded hole (51). The side end of the screw head (2) is fitted with the guide rod (3) through a fixing block (21).

2. A combination screw as claimed in claim 1, wherein The upper surface of the screw head (2) is provided with a cross groove (22), and the lower surface of the screw head (2) is fitted with a washer (4).

3. The combination screw of claim 1 wherein, Two sets of fixing blocks (21) are symmetrically welded to the outer end of the screw head (2); and guide rods (3) pass through the inner side of each fixing block (21).

4. The combination screw of claim 1 wherein, The upper surface of the limiting block (5) has an internal threaded hole (51), and the outer end of the limiting block (5) is welded to the movable ring block (41) through a connecting block (52).

5. The combination screw of claim 1 wherein, The guide rod (3) has an external thread on its lower end.

6. The combination screw of claim 1 wherein, The inner side of the gasket (4) is provided with a central hole (44); and the gasket (4) is fitted and attached to the upper end face of the screw rod (1) through the central hole (44).

7. The combination screw of claim 1 wherein, The gasket (4) has an extension plate (43) welded to its side end; and the extension plate (43) is located at the lower end of the movable ring block (41).

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