Screw fastener

Abstract

The screw fastener comprises a screw body and an inner screw, a first top plate is fixedly installed at the top of the screw body, a rotating groove is formed in the top of the first top plate, a clamping groove is formed in the top of the rotating groove, an inner thread cavity is formed in the screw body, and the inner screw is connected into the screw body in a threaded mode. A second top plate is fixedly mounted at the top of the inner screw and located in the rotating groove. According to the screw fastener, the inner threaded cavity is formed in the screw body, the rotating groove is formed in the top side of the first top plate, the bottom end of the inner screw penetrates through the rotating groove and extends into the inner threaded cavity, the inner screw is rotated till the second top plate at the top of the inner screw completely moves into the rotating groove, and after the screw body is installed, the screw body can be fixed conveniently. The fixing stability of the connecting position of the screw body and the workpiece is further enhanced, mounting is firmer, the arranged fixing plate is beneficial to preliminarily preventing dismounting of the second top plate and the inner screw in the rotating groove, and using is safer.

Description

Technical Field

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

[0002] A screw, also called a bolt, is a tool that uses the physical and mathematical principles of the inclined plane circular rotation and friction of an object to gradually fasten machine parts. The main function of a screw is to connect two workpieces together to play a fastening role.

[0003] The patent document with the publication number of CN219013140U discloses an anti-theft screw fastener, which includes a bolt assembly and a fastening assembly detachably installed on the top of the bolt assembly. The bolt assembly includes a screw rod and a screw head constructed at the top end of the screw rod. An internal hexagonal screw hole is centered at the top end of the screw head, and engaging grooves adapted to the fastening assembly are opened on both sides inside the internal hexagonal screw hole. The fastening assembly includes an anti-theft cover. A mounting seat inserted into the internal hexagonal screw hole is centered at the inner top end of the anti-theft cover, and arc-shaped plates are constructed on both sides of the bottom end of the mounting seat. Engaging teeth engaged and installed in the engaging grooves are constructed on both sides of the two arc-shaped plates. A steel ball abutted between the two arc-shaped plates is movably installed at the inner bottom of the mounting seat, and an elastic component abutted against the steel ball is fixedly installed at the inner top of the mounting seat. This anti-theft screw fastener has a simple structure, high fixing strength, good anti-theft performance, can be reused, and has a low cost during use.

[0004] The screw rod in the above related technology is fixed only by the external thread, resulting in unstable connection of the connected workpieces. In view of the above problems, we have introduced a screw fastener. Content of the Utility Model

[0005] The utility model discloses a screw fastener, aiming to solve the technical problem that the screw rod in the related technology is fixed only by the external thread, resulting in unstable connection of the connected workpieces.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A screw fastener includes a screw main body and an inner screw. A first top plate is fixedly installed at the top of the screw main body. A rotation groove is opened inside the top of the first top plate, and a card slot is opened at the top of the rotation groove. An internal thread cavity is opened inside the screw main body. The inner screw is threadedly connected inside the screw main body. A second top plate is fixedly installed at the top of the inner screw and located inside the rotation groove. The outer wall of the second top plate is in contact and rotation connection with the inner wall of the rotation groove. The top of the first top plate is connected to a fixing plate through a connection component.

[0008] By setting the internal threaded cavity inside the screw body and the rotation groove on the top side of the first top plate, the bottom end of the internal screw passes through the rotation groove and extends into the internal threaded cavity. Rotate the internal screw until the second top plate at the top of the internal screw completely moves into the rotation groove, which is beneficial to further strengthen the fixing stability of the connection between the screw body and the workpiece after the screw body is installed, making the installation more firm. The provided fixing plate is beneficial to initially prevent the disassembly of the second top plate and the internal screw inside the rotation groove, making it safer to use.

[0009] In a preferred embodiment, the connection assembly includes an annular groove. An annular groove is provided on the top of the first top plate and outside the card slot. A fixing ring is fixedly installed on the top of the fixing plate, and the fixing ring extends into the annular groove. Symmetric fixing grooves are provided at the bottom of the annular groove inside the first top plate. Symmetric fixing blocks are fixedly installed at the bottom of the fixing ring. Installation grooves are symmetrically provided on both sides of the fixing groove inside the first top plate. Springs are fixedly installed inside the installation grooves. The springs are fixedly installed with clamping blocks on the side close to the fixing groove. Clamping grooves are provided on the side of the fixing block close to the clamping block. One end of the clamping block close to the clamping groove extends into the clamping groove.

[0010] By setting the connection assembly, extending the fixing ring into the annular groove, and through the corresponding cooperation of the provided fixing groove, fixing block, installation groove, spring, clamping block and clamping groove, it is beneficial to quickly fix the fixing plate on the top of the first top plate.

[0011] In a preferred embodiment, the thread structure on the outside of the internal screw is opposite to the thread structure on the outside of the screw body.

[0012] By setting the thread structures on the outside of the internal screw and the screw body to be opposite, it is beneficial to strengthen the fixing stability of the internal screw to the screw body.

[0013] In a preferred embodiment, a clamping block is fixedly installed on the bottom of the fixing plate and on the side close to the rotation groove for cooperation with the rotation groove.

[0014] By setting both the clamping block and the corresponding rotation groove to be "hexagonal" structures, it is beneficial to support the fixing plate when the fixing plate is installed on the top of the first top plate.

[0015] In a preferred embodiment, positioning rods are symmetrically fixedly installed on the outside of the fixing ring. Corresponding positioning grooves are provided on the side inside the first top plate close to the positioning rods, and the positioning rods extend into the positioning grooves.

[0016] By setting the positioning rods to extend into the positioning grooves, it is beneficial to quickly position when fixing the fixing plate on the top of the first top plate, which is simple and convenient.

[0017] In a preferred embodiment, the length of the internal screw is greater than that of the screw body.

[0018] By setting the length of the inner screw to be greater than that of the screw body, it is beneficial to fix the relevant workpiece more stably.

[0019] The screw fastener provided by the present utility model has the following advantages:

[0020] Firstly, by setting the internal thread cavity inside the screw body and the rotation groove on the top side of the first top plate, passing the bottom end of the inner screw through the rotation groove and extending it into the internal thread cavity, and rotating the inner screw until the second top plate at the top of the inner screw completely moves into the rotation groove, it is beneficial to further enhance the stability of the connection between the screw body and the workpiece after the screw body is installed, making the installation more firm. The provided fixing plate helps to initially prevent the disassembly of the second top plate and the inner screw inside the rotation groove, making it safer to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 FIG. 1 is a three-dimensional schematic diagram of a screw fastener proposed by the present utility model.

[0022] Figure 2 FIG. 2 is a three-dimensional exploded schematic diagram of a screw fastener proposed by the present utility model.

[0023] Figure 3 FIG. 3 is a three-dimensional exploded sectional schematic diagram of a screw fastener proposed by the present utility model.

[0024] Figure 4 FIG. 4 Figure 3 is an enlarged view of part A in FIG. 3

[0025] Figure 5 FIG. 5 Figure 3 is an enlarged view of part B in FIG. 4.

[0026] In the drawings: 1, screw body; 11, internal thread cavity; 2, first top plate; 21, rotation groove; 22, card slot; 3, inner screw; 4, second top plate; 5, connection assembly; 51, annular groove; 52, fixing ring; 53, fixing slot; 54, fixing block; 55, installation slot; 56, spring; 57, clamping block; 58, clamping slot; 59, positioning slot; 510, positioning rod; 6, fixing plate; 61, clamping block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and marked in the accompanying drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application to be protected, but only represents the selected embodiments of the present application. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative efforts belong to the scope of protection of the present application.

[0028] A screw fastener disclosed by the utility model is mainly applied to the scenario of screw fastening.

[0029] Refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 A screw fastener includes: a screw body 1 and an inner screw 3. A first top plate 2 is fixedly installed at the top of the screw body 1. A rotation groove 21 is opened inside the top of the first top plate 2, and a clamping groove 22 is opened at the top of the rotation groove 21. An internal thread cavity 11 is opened inside the screw body 1. The inner screw 3 is threadedly connected inside the screw body 1. A second top plate 4 is fixedly installed at the top of the inner screw 3 and inside the rotation groove 21. The outer wall of the second top plate 4 is in contact and rotationally connected with the inner wall of the rotation groove 21. The top of the first top plate 2 is connected to a fixing plate 6 through a connecting component 5.

[0030] Wherein, the thread on the outside of the inner screw 3 is arranged in the opposite structure to the thread on the outside of the screw body 1; by setting the thread structures on the outside of the inner screw 3 and the screw body 1 to be opposite, it is beneficial to enhance the stability of the inner screw 3 for fixing the screw body 1.

[0031] Wherein, a clamping block 61 that is used in cooperation with the rotation groove 21 is fixedly installed at the bottom of the fixing plate 6 and on one side close to the rotation groove 21; by setting both the clamping block 61 and the corresponding rotation groove 21 to be "hexagonal" structures, it is beneficial to support the fixing plate 6 when the fixing plate 6 is installed on the top of the first top plate 2.

[0032] Wherein, the length of the inner screw 3 is greater than that of the screw body 1; by setting the length of the inner screw 3 to be greater than that of the screw body 1, it is beneficial to fix the relevant workpiece more stably.

[0033] In this embodiment: By providing an internal thread cavity 11 inside the screw body 1 and a rotation groove 21 on the top side of the first top plate 2, the bottom end of the internal screw 3 is passed through the rotation groove 21 and extended into the internal thread cavity 11. The internal screw 3 is rotated until the second top plate 4 at the top of the internal screw 3 is completely moved into the rotation groove 21. This is beneficial to further enhance the fixing stability at the connection between the screw body 1 and the workpiece after the screw body 1 is installed, making the installation more firm. The provided fixing plate 6 helps to initially prevent the disassembly of the second top plate 4 and the internal screw 3 inside the rotation groove 21, making it safer to use.

[0034] In the above technical solution, considering the problem of fixing the fixing plate 6 on the top of the first top plate 2, to solve such problems, the specific operation is as follows:

[0035] Refer to Figure 2 and Figure 3 , in a preferred embodiment, the connection assembly 5 includes an annular groove 51. An annular groove 51 is provided on the top of the first top plate 2 and outside the card slot 22. A fixing ring 52 is fixedly installed on the top of the fixing plate 6. The fixing ring 52 extends into the annular groove 51. Fixing grooves 53 are symmetrically provided inside the first top plate 2 and at the bottom of the annular groove 51. Fixing blocks 54 are symmetrically and fixedly installed at the bottom of the fixing ring 52. Installation grooves 55 are symmetrically provided on both sides of the fixing groove 53 inside the first top plate 2. Springs 56 are fixedly installed inside the installation grooves 55. On the side of the springs 56 close to the fixing groove 53, clamping blocks 57 are fixedly installed. Clamping grooves 58 are provided on the side of the fixing blocks 54 close to the clamping blocks 57. One end of the clamping block 57 close to the clamping groove 58 extends into the clamping groove 58;

[0036] Among them, positioning rods 510 are symmetrically and fixedly installed on the outside of the fixing ring 52. Positioning grooves 59 are correspondingly provided inside the first top plate 2 and close to the positioning rods 510. The positioning rods 510 extend into the positioning grooves 59; By providing the positioning rods (510) extending into the positioning grooves (59), it is beneficial to quickly position when fixing the fixing plate 6 on the top of the first top plate 2, which is simple and convenient.

[0037] In this embodiment: By providing the connection assembly 5, extending the fixing ring 52 into the annular groove 51, and through the corresponding cooperation of the provided fixing grooves 53, fixing blocks 54, installation grooves 55, springs 56, clamping blocks 57 and clamping grooves 58, it is beneficial to quickly fix the fixing plate 6 on the top of the first top plate 2.

[0038] Working principle: When in use, by setting the internal thread cavity 11 inside the screw body 1 and the rotating groove 21 on the top side of the first top plate 2, the bottom end of the inner screw 3 is passed through the rotating groove 21 and extended into the internal thread cavity 11. Rotate the inner screw 3 until the second top plate 4 at the top of the inner screw 3 is completely moved into the rotating groove 21, which is beneficial to further strengthen the fixing stability of the connection between the screw body 1 and the workpiece after the screw body 1 is installed, making the installation more firm. The set fixing plate 6 is beneficial to initially prevent the disassembly of the second top plate 4 and the inner screw 3 inside the rotating groove 21, making it safer to use.

[0039] The above is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. The substitution can be the substitution of part of the structure, device, and method steps, or a complete technical solution. Any equivalent substitution or change made according to the technical solution of the present invention and its inventive concept should be covered within the protection scope of the present invention.

Claims

1. A screw fastener, comprising a screw body (1) and an inner screw (3), characterized in that: A top plate No. 1 (2) is fixedly mounted on the top of the screw body (1); a rotation groove (21) is provided inside the top of the top plate No. 1 (2); a clamping groove (22) is provided on the top of the rotation groove (21); an internal thread cavity (11) is provided inside the screw body (1); the internal screw (3) is threadedly connected inside the screw body (1); a top plate No. 2 (4) is fixedly mounted on the top of the internal screw (3) and located inside the rotation groove (21); the outer wall of the top plate No. 2 (4) is rotationally connected to the inner wall of the rotation groove (21); and the top of the top plate No. 1 (2) is connected to a fixing plate (6) via a connecting assembly (5).

2. A screw fastener according to claim 1, characterized in that: The connecting assembly (5) comprises an annular groove (51), an annular groove (51) is provided at the top of the No. 1 top plate (2) and located outside the clamping groove (22), a fixing ring (52) is fixedly installed at the top of the fixing plate (6), the fixing ring (52) extends into the inside of the annular groove (51), a fixing groove (53) is symmetrically provided inside the No. 1 top plate (2) and located at the bottom of the annular groove (51), a fixing block (54) is symmetrically fixedly installed at the bottom of the fixing ring (52), and the fixing ring (52) is fixedly installed at the bottom of the fixing ring (52). The first top plate (2) is provided with mounting grooves (55) symmetrically on both sides of the fixing groove (53), a spring (56) is fixedly installed inside the mounting groove (55), a clamping block (57) is fixedly installed on one side of the spring (56) close to the fixing groove (53), a clamping groove (58) is provided on one side of the fixing block (54) close to the clamping block (57), and one end of the clamping block (57) close to the clamping groove (58) extends into the inside of the clamping groove (58).

3. A screw fastener according to claim 1, characterized in that: The thread on the outside of the inner screw (3) is arranged opposite to the thread structure on the outside of the screw body (1).

4. A screw fastener according to claim 1, characterized in that: A clamping block (61) for use in conjunction with the rotating groove (21) is fixedly mounted on the bottom of the fixing plate (6) and on one side close to the rotating groove (21).

5. A screw fastener according to claim 2, characterized in that: A positioning rod (510) is symmetrically fixedly mounted on the outside of the fixing ring (52), and a positioning groove (59) is correspondingly provided inside the first top plate (2) and on a side close to the positioning rod (510), and the positioning rod (510) extends into the inside of the positioning groove (59).

6. A screw fastener according to claim 1, characterized in that: The length of the inner screw (3) is greater than the screw body (1).

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