A kind of anti-loosening screw

Abstract

The utility model provides a kind of anti-loosening screw, which belongs to the technical field of screws; it comprises a screw rod and a screw head integrally formed at the top of the screw rod, a nut is threadedly connected to the surface of the screw rod, a groove is provided at the bottom of the screw rod, a plug-in is slidably connected to the inner wall of the groove, the plug-in comprises a plug-in plate, the cross section of the plug-in plate is trapezoidal, the width of the plug-in plate away from the end of the screw rod is greater than the width close to the end of the screw rod, a side of the plug-in plate in contact with the inner wall of the groove is provided with a plurality of insert teeth, and the insert teeth are inclined in the direction away from the screw rod. The utility model arranges the plug-in plate, after the nut is screwed on the screw rod, the plug-in plate is inserted into the groove, the bottom of the screw rod is propped open by the insert teeth, after the bottom of the screw rod is propped open, the nut cannot rotate along the thread direction of the screw rod, the nut will not loosen due to vibration during use, and it is safer to use.

Description

Technical Field

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

[0002] A screw is a mechanical connection part, usually composed of a screw rod and a screw head. The main function of a screw is to fix two or more parts together with a nut, and it can be easily disassembled. During use, the screw is passed through two or more parts, and the nut is screwed on the screw rod to fix the two or more parts.

[0003] After screws and nuts fix two or more components, after long-term use, the nuts will loosen due to vibration, causing shaking between the two or more components. There is a need for further optimization of the screws in the anti-loosening direction. Therefore, the present application provides an anti-loosening screw to meet the demand. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide an anti-loosening screw to solve the problem that the nut becomes loose due to vibration after the screw is used for a long time.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] A kind of anti-loosening screw comprises a screw rod and a screw head integrally formed at the top of the screw rod, a nut is threadedly connected to the surface of the screw rod, a groove is provided at the bottom of the screw rod, an insert is slidably connected to the inner wall of the groove, the insert comprises an insert plate, the cross section of the insert plate is trapezoidal, the width of the insert plate away from the end of the screw rod is greater than the width close to the end of the screw rod, a plurality of insert teeth are arranged on the side of the insert plate that is in contact with the inner wall of the groove, and the insert teeth are inclined in the direction away from the screw rod.

[0007] Preferably, a through hole is opened at the top of the plug plate, a positioning rod is fixed to the top of the inner wall of the groove, and the side surface of the positioning rod is slidably connected to the inner wall of the through hole.

[0008] Preferably, the cross section of the positioning rod is rhombus-shaped.

[0009] Preferably, there are two positioning rods, which are symmetrically arranged about the middle of the plug board.

[0010] Preferably, a circular plate is fixed to the bottom of the plug plate.

[0011] Preferably, the bottom of the circular plate is provided with anti-slip stripes, and the bottom edge of the circular plate is provided with chamfers.

[0012] Preferably, a fracture groove is provided on the side of the plug plate.

[0013] Preferably, the fracture groove is provided with an inclined surface near the center of the screw rod.

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

[0015] In the above scheme, by setting a plug-in, after the nut is screwed on the screw rod, the plug plate is inserted into the groove, and the bottom of the screw rod is stretched open by the teeth. After the bottom of the screw rod is stretched open, the nut cannot rotate along the thread direction of the screw rod. The nut will not loosen due to vibration during use, and it is safer to use.

[0016] By setting the breaking groove, when only a part of the plug board is inserted into the groove, the plug board is knocked from the side to make the plug board break from the breaking groove close to the bottom of the screw rod, and the excess plug board is knocked down to avoid the plug board getting in the way during use. After the breaking groove is set, the plug board breaks along the direction of the breaking groove, which makes it easier to break the plug board, but will not affect the force applied to the plug board in the vertical direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, further serve to explain the principles of the present disclosure and to enable those skilled in the relevant art to make and use the present disclosure.

[0018] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0019] Figure 2 This is the front view of the utility model;

[0020] Figure 3 For this utility model Figure 2 Schematic diagram of the structure at A in the middle;

[0021] Figure 4 This is a cross-sectional view of the positioning rod of the utility model when it is inserted into the through hole;

[0022] Figure 5 It is a cross-sectional view of the through hole of the utility model.

[0023] [Reference Signs]

[0024] 1. Screw head; 2. Screw rod; 3. Nut; 4. Groove; 5. Insert; 51. Insert plate; 52. Insert teeth; 6. Fracture groove; 7. Positioning rod; 8. Through hole; 9. Round plate.

[0025] As shown in the figure, in order to clearly implement the structure of the embodiment of the utility model, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the utility model to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments, and the adjustments or modifications made are still included in the scope of the attached claims. DETAILED DESCRIPTION

[0026] The following is a detailed description of a locking screw provided by the utility model in combination with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternatives to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments, and are not intended to specifically limit the utility model.

[0027] It should be noted that the references to "one embodiment", "embodiment", "exemplary embodiments", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0028] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0029] like Figure 1-Figure 5 As shown, an embodiment of the utility model provides a kind of anti-loosening screw, including a screw rod 2 and a screw head 1 integrally formed at the top of the screw rod 2, a nut 3 is threadedly connected to the surface of the screw rod 2, a groove 4 is provided at the bottom of the screw rod 2, and an insert 5 is slidably connected to the inner wall of the groove 4, and the insert 5 includes an insert plate 51, and the cross section of the insert plate 51 is trapezoidal, and the width of the insert plate 51 away from the end of the screw rod 2 is greater than the width close to the end of the screw rod 2, and a plurality of insert teeth 52 are provided on the side where the insert plate 51 is in contact with the inner wall of the groove 4, and the insert teeth 52 are inclined in the direction away from the screw rod 2, and the insert teeth 52 in the groove 4 not only play the role of propping up the bottom of the screw rod 2, but also the insert teeth 52 opened downward can form a "barb" structure, which increases the friction force of the insert teeth 52 when sliding downward in the groove 4, and prevents the insert teeth 52 from sliding downward in the groove 4 during use.

[0030] like Figure 4As shown, in this embodiment, a through hole 8 is opened on the top of the plug plate 51, and a positioning rod 7 is fixed on the top of the inner wall of the groove 4. The side of the positioning rod 7 is slidably connected with the inner wall of the through hole 8. When the positioning rod 7 slides in the through hole 8, the plug plate 51 can only move along the direction of the positioning rod 7, so as to guide the plug plate 51 and prevent the plug plate 51 from falling out of the groove 4.

[0031] like Figure 4 As shown, in this embodiment, the cross section of the positioning rod 7 is a diamond shape. The positioning rod 7 prevents the insert plate 51 from lateral displacement. The diamond shape is subjected to greater force in the long axis direction of the diamond shape, thereby preventing the positioning rod 7 from being damaged during guidance.

[0032] like Figure 4 As shown, in this embodiment, there are two positioning rods 7, which are symmetrically arranged about the middle of the plug plate 51. The internal size can be used to arrange two positioning rods 7. The two positioning rods 7 will not affect the structural strength of the plug plate 51, and the two positioning rods 7 can withstand greater lateral forces.

[0033] like Figure 1 and Figure 2 As shown, in this embodiment, a circular plate 9 is fixed at the bottom of the inserting plate 51, and the circular plate 9 increases the contact area with the hammer when striking, so that the striking is more precise.

[0034] like Figure 3 As shown, in this embodiment, anti-slip stripes are provided at the bottom of the circular plate 9 to increase the friction when in contact with the hammer and prevent the hammer from sliding when in contact with the circular plate 9. Chamfers are provided at the bottom edge of the circular plate 9 to prevent the edge from collapsing when the hammer hits the circular plate 9 and to avoid stress concentration at the edge of the circular plate 9.

[0035] like Figure 3 As shown, in this embodiment, a breaking groove 6 is provided on the side of the inserting plate 51, so that the inserting plate 51 can be broken at the breaking groove 6, and the breaking is easier.

[0036] like Figure 3 As shown, in this embodiment, the fracture groove 6 is provided with an inclined surface near the center position of the screw rod 2. When the inserting plate 51 is fractured, the inserting plate 51 can only be fractured from the top plane of the fracture groove 6, and the fracture position is more accurate.

[0037] Working principle: After the screw head 1 passes through the part, insert the hexagonal wrench into the hexagonal slot of the screw head 1, position the screw head 1 and the screw rod 2 with the hexagonal wrench, screw the nut 3 on the screw rod 2, and tighten the nut 3 by cooperating with the wrench and the hexagonal wrench;

[0038] After the nut 3 is tightened, the insert plate 51 is inserted into the groove 4, and the through hole 8 at the top of the insert plate 51 is aligned with the direction of the positioning rod 7, and the positioning rod 7 is inserted into the through hole 8. Then, the top of the circular plate 9 is knocked by a hammer to knock the insert plate 51 in the direction of the screw rod 2. After the insert plate 51 is deeply inserted into the groove 4, the insert teeth 52 are supported on the inner wall of the groove 4, and the bottom of the screw rod 2 is pushed outward by the insert teeth 52, so that the nut 3 is fixed on the surface of the screw rod 2;

[0039] If part of the plug board 51 is not inserted into the groove 4, the plug board 51 is broken at the breaking groove 6 closest to the bottom of the screw rod 2 by hitting the plug board 51 with a hammer, and the excess plug board 51 is knocked down to avoid the excess plug board 51 getting in the way.

[0040] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, the specific details are described in detail in the above preferred embodiments of the present invention, and those skilled in the art can fully understand the present invention without the description of these details.

[0041] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A locking screw, comprising a screw rod (2) and a screw head (1) integrally formed on the top of the screw rod (2), a nut (3) being threadedly connected to the surface of the screw rod (2), characterized in that: The screw rod (2) is provided with a groove (4) at the bottom, and a plug-in (5) is slidably connected to the inner wall of the groove (4). The plug-in (5) comprises a plug-in plate (51). The cross section of the plug-in plate (51) is trapezoidal. The width of the plug-in plate (51) at the end away from the screw rod (2) is greater than the width at the end close to the screw rod (2). A plurality of insert teeth (52) are provided on the side of the plug-in plate (51) that is in contact with the inner wall of the groove (4). The insert teeth (52) are inclined in a direction away from the screw rod (2). A fracture groove (6) is provided on the side of the plug-in plate (51).

2. The anti-loosening screw according to claim 1, characterized in that: A through hole (8) is formed at the top of the plug plate (51), a positioning rod (7) is fixed to the top of the inner wall of the groove (4), and the side of the positioning rod (7) is slidably connected to the inner wall of the through hole (8).

3. The anti-loosening screw according to claim 2, characterized in that: The positioning rod (7) has a rhombus-shaped cross section.

4. The anti-loosening screw according to claim 2, characterized in that: There are two positioning rods (7) in total, and the two positioning rods (7) are symmetrically arranged about the middle of the plug plate (51).

5. The anti-loosening screw according to claim 1, characterized in that: A circular plate (9) is fixed to the bottom of the inserting plate (51).

6. The anti-loosening screw according to claim 5, characterized in that: The bottom of the circular plate (9) is provided with anti-slip stripes, and the bottom edge of the circular plate (9) is provided with a chamfer.

7. The anti-loosening screw according to claim 1, characterized in that: The fracture groove (6) is provided with an inclined surface in a direction close to the center position of the screw rod (2).

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