Self-locking screw

Abstract

The utility model relates to the technical field of screws, in particular to a self-locking screw which comprises a screw body, the outer side of the screw body is in threaded connection with a nut, the outer side of the screw body is sleeved with a gasket, the inner side of the screw body is provided with a rectangular groove and a limiting groove, the end side of the screw body is provided with a drawing hole, and the drawing hole is connected with the nut. A square tube is fixedly connected to the inner side of the drawing hole, a sliding plate is slidably connected to the inner side of the square tube, a clamping strip is fixedly connected to the end side of the sliding plate, a plurality of clamping grooves are evenly formed in the inner side of the nut, the size of the clamping grooves is matched with the size of the clamping strip, and two check blocks are fixedly connected to the inner side of the limiting groove. By means of the structure, flexible self-locking work between the screw body and the nut is facilitated, the phenomenon that the screw body is loosened due to vibration in the using process is avoided, and the using stability between the screw body and the nut is improved to a certain degree.

Description

Technical Field

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

[0002] A screw is a commonly used fastener, usually consisting of a head, a thread and a rod. By rotating the thread, the thread matches the thread of the object being fixed, thereby playing a role of fixing, connecting or supporting. There are many types of screws, the most common ones are screws, nuts, nuts and bolts, etc. Screws can be divided into various types according to the shape of the head and the type of thread. For example, the thread diameter, pitch, screw length, etc. will be different.

[0003] The existing related technologies often have the following defects: during the actual use of the screw, when the screw body and the nut are subjected to external forces such as vibration, the vibration between the two can easily lead to loosening of the nut on the screw body, thereby reducing the stability of the screw in use.

[0004] Therefore, the utility model provides a self-locking screw. Utility Model Content

[0005] The utility model aims to solve the defect in the prior art that the screws are easy to loosen when subjected to external forces such as vibration, and proposes a self-locking screw.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a self-locking screw, comprising a screw body, a nut is threadedly connected to the outer side of the screw body, a gasket is sleeved on the outer side of the screw body, a rectangular groove and a limit groove are provided on the inner side of the screw body, a withdrawal hole is provided on the end side of the screw body, a square tube is fixedly connected to the inner side of the withdrawal hole, a slide is slidably connected to the inner side of the square tube, a clamping strip is fixedly connected to the end side of the slide, and a plurality of clamping grooves are evenly provided on the inner side of the nut, and the size of the clamping grooves is matched with the size of the clamping strip.

[0007] The effect achieved by the above components is: by setting the above structure, the flexible self-locking work between the screw body and the nut is facilitated, the loosening of the screw body due to vibration during use is avoided, and the stability of the use between the screw body and the nut is improved to a certain extent.

[0008] Preferably, two stoppers are fixedly connected to the inner side of the limiting groove, and two spring sheets are fixedly connected to the surface of the clamping strip located on the inner side of the limiting groove, and the spring sheets are arc-shaped structures.

[0009] The effect achieved by the above components is that the clamping strip is inserted into the inner side of the corresponding clamping groove on the nut under the elastic force of the spring sheet between the clamping strip and the stopper.

[0010] Preferably, a push rod is fixedly connected to the side wall of the clamping strip, the push rod is a bent structure, a sliding rod is slidably connected to the inner side of the withdrawal hole, a reserved groove is opened on the inner side of the sliding rod, the push rod is located on the inner side of the reserved groove, and the square passage is located on the inner side of the reserved groove.

[0011] The effects achieved by the above components are: the reserved groove will move relative to the push rod of the bending structure, and the inner side of the sliding rod will move relative to the push rod, thereby achieving compression of the folded strip position.

[0012] Preferably, a roller is rotatably connected to the inner side of the reserved groove on the slide rod.

[0013] The effect achieved by the above components is that the arrangement of the roller reduces the friction force when relative movement occurs between the bottom side of the reserved groove and the push rod.

[0014] Preferably, a pull block is fixedly connected to the end side of the sliding rod.

[0015] The effect achieved by the above components is: when the pull block is pulled, the pull block will drive the slide bar to slide on the inner side of the draw hole.

[0016] Preferably, a connecting pin is fixedly connected to the surface of the screw body, and a rotating plate is rotatably connected to the end side of the connecting pin.

[0017] The effect achieved by the above components is: by rotating the rotating plate on the connecting pin, the pulling block can be shielded, further improving the multi-layer self-locking effect of the screw.

[0018] In summary:

[0019] In the utility model, when the pulling block is loosened, the clamping strip will be inserted into the inner side of the corresponding clamping groove on the nut by the elastic force of the spring sheet between the clamping strip and the stop block, so that the fixing work between the nut and the screw body after twisting can be realized. By setting the above structure, the flexible self-locking work between the screw body and the nut is facilitated, the phenomenon of loosening of the screw body due to vibration during use is avoided, and the stability of the use between the screw body and the nut is improved to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0021] Figure 2 This is a schematic diagram of the disassembled structure of the utility model;

[0022] Figure 3 It is a structural schematic diagram of the sliding rod in the utility model;

[0023] Figure 4It is a structural schematic diagram of the nut in the utility model;

[0024] Figure 5 For the utility model Figure 2 Enlarged view of point A.

[0025] Legend: 1. Screw body; 2. Nut; 3. Washer; 4. Connecting pin; 5. Turn plate; 6. Slide rod; 7. Pull block; 8. Push rod; 9. Extraction hole; 10. Rectangular groove; 11. Limiting groove; 12. Card strip; 13. Square passage; 14. Slide plate; 15. Reserved groove; 16. Stop block; 17. Spring piece; 18. Card slot; 19. Roller. DETAILED DESCRIPTION

[0026] Reference Figure 1-5 As shown, the utility model provides a technical solution: a self-locking screw, comprising a screw body 1, a nut 2 is threadedly connected to the outer side of the screw body 1, and a gasket 3 is sleeved on the outer side of the screw body 1.

[0027] The following is a detailed description of its overall specific settings and functions.

[0028] In this embodiment: a rectangular groove 10 and a limiting groove 11 are provided on the inner side of the screw body 1, a draw hole 9 is provided on the end side of the screw body 1, a square tube 13 is fixedly connected to the inner side of the draw hole 9, a slide plate 14 is slidably connected to the inner side of the square tube 13, a clamping strip 12 is fixedly connected to the end side of the slide plate 14, and a plurality of clamping grooves 18 are evenly provided on the inner side of the nut 2, and the size of the clamping groove 18 is adapted to the size of the clamping strip 12. By setting the above structure, the flexible self-locking work between the screw body 1 and the nut 2 is facilitated, the phenomenon of the screw body 1 being loosened due to vibration during use is avoided, and the stability of the use between the screw body 1 and the nut 2 is improved to a certain extent. Two stoppers 16 are fixedly connected to the inner side of the limiting groove 11, and two springs 17 are fixedly connected to the surface of the clamping strip 12 located on the inner side of the limiting groove 11, and the springs 17 are arc-shaped structures. The clamping strip 12 will be inserted into the inner side of the corresponding clamping groove 18 on the nut 2 by the elastic force of the springs 17 between the stopper 16.

[0029] Specifically, the side wall of the clamping strip 12 is fixedly connected with a push rod 8, which is a bent structure, and the inner side of the draw hole 9 is slidably connected with a slide rod 6, and a reserved groove 15 is provided on the inner side of the slide rod 6, and the push rod 8 is located on the inner side of the reserved groove 15, and the square passage 13 is located on the inner side of the reserved groove 15. The reserved groove 15 will move relative to the push rod 8 of the bent structure, and the inner side of the slide rod 6 will move relative to the push rod 8, so as to realize the compression work of the folded strip position.

[0030] The inner side of the reserved groove 15 on the slide bar 6 is rotatably connected with a roller 19. The setting of the roller 19 reduces the friction force when the bottom side of the reserved groove 15 and the push rod 8 move relative to each other. The end side of the slide bar 6 is fixedly connected with a pull block 7. When the pull block 7 is pulled, the pull block 7 will drive the slide bar 6 to slide on the inner side of the withdrawal hole 9. The surface of the screw body 1 is fixedly connected with a connecting pin 4, and the end side of the connecting pin 4 is rotatably connected with a rotating plate 5. By rotating the rotating plate 5 on the connecting pin 4, the pull block 7 can be shielded, further improving the multi-layer self-locking effect of the screw.

[0031] Working principle: when it is necessary to put the nut 2 on the screw body 1 to fix the product, first pull the pull block 7, the pull block 7 will drive the slide bar 6 to slide on the inner side of the withdrawal hole 9, at this time, the reserved groove 15 will have relative movement with the push rod 8 of the bending structure, and the inner side of the slide bar 6 will have relative movement with the push rod 8, which can realize the compression of the folding strip position, and the setting of the roller 19 reduces the friction force when the bottom side of the reserved groove 15 and the push rod 8 move relative to each other. At this time, the folding strip will drive the clamping strip 12 to retract the inner side of the limiting groove 11, and the normal twisting of the nut 2 on the screw body 1 can be realized. When the nut 2 moves to the surface of the product to fix the product, release the pull block 7, and at this time, the clamping strip 12 will be inserted into the inner side of the corresponding clamping slot 18 on the nut 2 under the elastic force of the spring piece 17 between the stop block 16, so as to realize the twisted screw The fixing work between the nut 2 and the screw body 1, wherein the slide plate 14 slides on the inner side of the square tube 13 to limit the moving direction of the clamping strip 12, at this time, the self-locking work between the nut 2 and the screw body 1 after twisting can be realized, thereby improving the stability of the use between the nut 2 and the screw body 1, and avoiding the nut 2 to be loosened by external force and the screw body 1. After locking the nut 2 and the screw body 1, the rotating plate 5 on the connecting pin 4 is rotated to achieve the shielding work of the pulling block 7, thereby further improving the multi-layer self-locking effect of the screw. By setting the above structure, the flexible self-locking work between the screw body 1 and the nut 2 is facilitated, and the phenomenon of loosening of the screw body 1 due to vibration during use is avoided, thereby improving the stability of the use between the screw body 1 and the nut 2 to a certain extent.

[0032] 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 an indirect connection 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 by specific circumstances.

Claims

1. A self-locking screw, comprising a screw body (1), characterized in that: The outer side of the screw body (1) is threadedly connected to a nut (2), the outer side of the screw body (1) is sleeved with a gasket (3), the inner side of the screw body (1) is provided with a rectangular groove (10) and a limit groove (11), the end side of the screw body (1) is provided with a withdrawal hole (9), the inner side of the withdrawal hole (9) is fixedly connected to a square tube (13), the inner side of the square tube (13) is slidably connected to a slide plate (14), the end side of the slide plate (14) is fixedly connected to a clamping strip (12), and the inner side of the nut (2) is evenly provided with a plurality of clamping grooves (18), the size of the clamping grooves (18) is adapted to the size of the clamping strip (12).

2. A self-locking screw according to claim 1, characterized in that: Two stoppers (16) are fixedly connected to the inner side of the limiting groove (11), and two spring sheets (17) are fixedly connected to the surface of the clamping strip (12) located on the inner side of the limiting groove (11), wherein the spring sheets (17) are arc-shaped structures.

3. A self-locking screw according to claim 1, characterized in that: The side wall of the clamping strip (12) is fixedly connected with a push rod (8), and the push rod (8) is a bent structure. The inner side of the extraction hole (9) is slidably connected with a slide rod (6), and a reserved groove (15) is provided on the inner side of the slide rod (6). The push rod (8) is located on the inner side of the reserved groove (15), and the square passage (13) is located on the inner side of the reserved groove (15).

4. A self-locking screw according to claim 3, characterized in that: The inner side of the reserved groove (15) on the slide bar (6) is rotatably connected with a roller (19).

5. A self-locking screw according to claim 3, characterized in that: A pull block (7) is fixedly connected to the end side of the sliding rod (6).

6. A self-locking screw according to claim 1, characterized in that: A connecting pin (4) is fixedly connected to the surface of the screw body (1), and a rotating plate (5) is rotatably connected to the end side of the connecting pin (4).

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