Lock bolt

Abstract

The utility model discloses a lock bolt which comprises a body, the body comprises a nut and a screw rod which extends downwards to be arranged at the bottom of the nut, an elastic gasket is integrally formed on the screw rod in a sleeved mode, the elastic gasket has elasticity and is arranged at the position close to the nut, and a high-friction section used for locking is arranged between the elastic gasket and the nut. The anti-loosening bolt is reasonable in structural design, the high-friction section is arranged between the elastic gasket and the nut, and the elastic gasket is matched with the inner chamfer of the nut hole, so that in the process of tightening the bolt, the elasticity of the elastic gasket generates axial force acting on the screw rod, long-distance high friction force is generated, and the anti-loosening effect is generated; the anti-loosening structure of the bolt is manufactured and formed in one step through the integrally-formed structure, extra accessories are not needed, manufacturing and assembling are easy, the failure rate is low, energy is saved, environment is protected, and operation is convenient.

Description

Technical Field

[0001] The utility model relates to the field of manufacturing industry, in particular to an anti-loosening bolt. Background Art

[0002] Bolts are very common mechanical parts, playing a vital role in daily life and industrial manufacturing. They are also known as the "rice of industry," reflecting their widespread application. Bolts are used in electronics, mechanical products, digital products, power equipment, electromechanical products, ships, vehicles, hydraulic engineering, and even chemical experiments. Bolts are a type of fastener consisting of a nut and a rod (a cylindrical rod with external threads). They are used to fasten two parts with through-holes together when mated with a nut.

[0003] At present, traditional anti-loosening bolts require additional accessories, such as gaskets, O-rings or anti-loosening glue to achieve the anti-loosening effect. Bolt gaskets are anti-slip annular iron sheets installed on bolts. When the bolts are tightened, they can increase the friction between the nut and the equipment fixings, thereby preventing the bolts from loosening and playing a role in protecting the bolts. However, during the operation of the equipment, due to long-term vibration, the gasket and the bolt will become loose, its anti-loosening effect will be weakened, and the bolts will easily fall off. Existing bolt gaskets are usually complete annular structures. When installing, the bolts need to be passed through the bolt gaskets first, and then the bolts need to be tightened on the equipment fixings. During the installation process, the gaskets are easy to fall off and misplaced, and the operation is more troublesome. On the other hand, different use environments have different requirements for the thickness of the gaskets. The installers need to prepare gaskets of various thicknesses and constantly try during installation to select the appropriate thickness. The whole process is cumbersome and the work efficiency is low. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide an anti-loosening bolt in view of the current status of the existing technology.

[0005] The technical solution adopted by the utility model to solve the above technical problems is: an anti-loosening bolt, including a body, the body including a nut and a screw rod extending downwardly and arranged at the bottom of the nut, characterized in that: an elastic gasket is integrally formed on the screw rod, the elastic gasket is elastic, and is arranged close to the nut, and a high friction section for anti-loosening is provided between the elastic gasket and the nut.

[0006] Preferably, the high friction section is the height of the screw corresponding to the distance from the top surface of the elastic gasket to the bottom surface of the nut. During the tightening process, the elastic gasket is deformed, and the elastic gasket generates a high friction force acting on the screw through the high friction section. After tightening, the elastic gasket is concavely deformed in the direction away from the nut, and the bottom surface of the nut and the top surface of the elastic gasket are in contact with each other.

[0007] Preferably, the screw includes a non-threaded section and a variable-pitch threaded section, the elastic gasket is arranged on the non-threaded section, and the variable-pitch threaded section includes a plurality of external threads integrally provided on the screw, and the distance between the external threads changes layer by layer.

[0008] Preferably, it also includes a nut that cooperates with the main body, a nut hole is provided in the nut, the inner wall of the nut hole is provided with a chamfer and an internal thread, the inner wall of the chamfer is inclined inward, the deformed elastic gasket is located in the chamfer, and the external thread and the internal thread are screwed together.

[0009] Preferably, after the main body is taken out from the nut hole, the elastic gasket returns to its original shape under the action of elastic force.

[0010] Preferably, the height of the high friction section is less than 1 cm.

[0011] Preferably, the outer diameter of the elastic gasket is greater than or equal to the outer diameter of the upper surface of the nut.

[0012] Preferably, the elastic gasket and the screw are detachably connected.

[0013] Preferably, at least one needle body for increasing friction is provided at any position on the external thread, and the end of the needle body is in contact with the internal thread to generate friction. One end of the needle body is fixed on the screw rod, and the other end of the needle body extends outward. The length of the needle body extending outward is greater than the length of the external thread extending outward.

[0014] Compared with the prior art, the advantages of the present invention are: by arranging a high friction section between the elastic gasket and the nut, and by combining the elastic gasket with the chamfer in the nut hole, the elasticity of the elastic gasket generates an axial force acting on the screw during the tightening of the bolt, resulting in a high friction force over a long distance, thereby producing an anti-loosening effect. The one-piece molded structure manufactures the anti-loosening structure of the bolt in one step, without the need for additional accessories, is easy to manufacture and assemble, has a low failure rate, is energy-saving and environmentally friendly, and is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the utility model;

[0016] Figure 2 This is a schematic diagram of the cross-sectional structure of the nut of the utility model;

[0017] Figure 3 This is a schematic diagram of the cross-sectional structure of the utility model when the main body is not fastened;

[0018] Figure 4 This is a schematic diagram of the cross-sectional structure of the utility model after the main body is tightened;

[0019] Figure 5 It is a structural diagram of embodiment 3 of the present utility model.

[0020] Figure numerals: 1. nut; 2. screw; 3. elastic gasket; 4. high friction section; 5. non-threaded section; 6. variable pitch thread section; 7. external thread; 8. nut; 9. nut hole; 10. chamfer; 11. internal thread; 12. needle body. DETAILED DESCRIPTION

[0021] The following diagrams illustrate various embodiments of the present invention. For clarity, many practical details will be included in the following description. However, it should be understood that these practical details are not intended to limit the present invention. In other words, in some embodiments of the present invention, these practical details are not essential. Furthermore, to simplify the drawings, some commonly used structures and components are depicted in simplified schematic form.

[0022] It should be noted that all directional indications in the embodiments of the present invention, such as up, down, left, right, front, back... are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0023] Moreover, some of the above-mentioned terms may be used to express other meanings in addition to indicating orientation or positional relationships. For example, the term "on" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For ordinary technicians in this field, the specific meanings of these terms in this utility model can be understood according to the specific circumstances.

[0024] Furthermore, the terms "installed," "disposed," "provided with," "connected," "connected," and "socketed" should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integral structures; mechanical connections or electrical connections; direct connections, indirect connections through an intermediary, or internal connections between two devices, elements, or components. The connection methods discussed herein are prior art and are common knowledge to those skilled in the art without modification. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0025] In addition, in the present invention, descriptions such as "first" and "second" are only used for descriptive purposes and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention. Example 1

[0026] like Figures 1 to 4 As shown, the utility model provides an anti-loosening bolt, including a body, the body including a nut 1 and a screw rod 2 extending downwardly and arranged at the bottom of the nut 1; specifically, an elastic gasket 3 is integrally formed on the screw rod 2, the elastic gasket 3 is elastic, and the elastic gasket 3 is arranged close to the nut 1, and a high friction section 4 for anti-loosening is provided between the elastic gasket 3 and the nut 1.

[0027] The high friction section 4 is the height of the screw 2 corresponding to the top surface of the elastic gasket 3 to the bottom surface of the nut 1. During the tightening process, the elastic gasket 3 is deformed, and the elastic gasket 3 generates a high friction force acting on the screw 2 through the high friction section 4; specifically, after tightening, the elastic gasket 3 is concavely deformed in the direction away from the nut 1, and the bottom surface of the nut 1 and the top surface of the elastic gasket 3 are in contact and connected.

[0028] The screw 2 includes a non-threaded section 5 and a variable-pitch threaded section 6, with an elastic gasket 3 positioned on the non-threaded section 5. Specifically, the variable-pitch threaded section 6 includes a plurality of external threads 7 integrally formed on the screw 2, with the distance between the external threads 7 varying layer by layer. The advantages of designing the variable-pitch threaded section 6 on the screw 2 include improved connection reliability, compatibility with high-strength materials, reduced installation difficulty, and improved transmission efficiency.

[0029] It also includes a nut 8 that cooperates with the main body, a nut hole 9 is provided in the nut 8, and the inner wall of the nut hole 9 is provided with a chamfer 10 and an internal thread 11; specifically, the inner wall of the chamfer 10 is inclined inward, the deformed elastic gasket 3 is located in the chamfer 10, and the external thread 7 is screwed together with the internal thread 11.

[0030] After the main body is taken out from the nut hole 9, the elastic gasket 3 returns to its original shape under the action of elastic force.

[0031] The height of the high friction section 4 is less than 1 cm.

[0032] The outer diameter of the elastic washer 3 is greater than or equal to the outer diameter of the upper surface of the nut 8 .

[0033] The working principle of the present invention is as follows: the screw rod 2 is placed in the corresponding nut hole 9, the external thread 7 on the variable pitch thread section 6 is aligned with the internal thread 11 on the inner wall of the nut hole 9, and the screw rod 2 is screwed into the nut hole 9 through the screw connection of the external thread 7 and the internal thread 11 by rotating the nut 1 until the bottom surface of the elastic gasket 3 contacts the outer edge of the top surface of the nut 8, and the nut 1 is continued to be rotated, and the middle part of the elastic gasket 3 is concavely deformed into the chamfer 10. In the process of continued rotation, the elastic gasket 3 generates a high friction force acting on the axial direction of the screw rod 2 through the high friction section 4, and a high friction force over a long distance is generated, which produces an anti-loosening effect until the bottom surface of the nut 1 contacts and connects with the top surface of the elastic gasket 3;

[0034] To remove the body from the nut hole 9, rotate the nut 1 in the opposite direction. During the outward rotation, the elastic washer 3 returns to its original shape due to its own elasticity, allowing for reuse. The body needs to be used in conjunction with the nut 8 with a chamfer 10 to prevent loosening. It can be used in various industrial fastening structures, including but not limited to the automotive, sporting goods, toy, electronics, and pharmaceutical industries.

[0035] The advantages of the present invention are: by arranging a high friction section 4 between the elastic gasket 3 and the nut 1, and by cooperating with the elastic gasket 3 and the chamfer 10 inside the nut hole 9, the elasticity of the elastic gasket 3 generates an axial force acting on the screw 2 during the tightening of the bolt, resulting in a high friction force over a long distance, thereby producing an anti-loosening effect. The one-piece molding structure forms the anti-loosening structure of the bolt in one step, without the need for additional accessories, easy to manufacture and assemble, with a low failure rate, energy saving and environmental protection, and easy operation. Example 2

[0036] The difference from the first embodiment is that in this embodiment, the elastic gasket 3 and the screw rod 2 are detachably connected. The other structures are the same as those in the first embodiment. Example 3

[0037] like Figure 5 As shown, unlike Example 1, this embodiment has at least one needle 12 positioned at any position on the external thread 7 to increase friction. The end of the needle 12 abuts against the internal thread 11 to generate friction. One end of the needle 12 is fixed to the screw 2, and the other end of the needle 12 extends outward. The length of the needle 12 extending outward is greater than the length of the external thread 7 extending outward. That is, the length of the needle 12 protruding away from the screw 2 is a, and the length of the external thread 7 protruding away from the screw 2 is b, with a>b. The rest of the structure is the same as Example 1.

[0038] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and integrate different embodiments or examples, and features of different embodiments or examples, described in this specification, unless otherwise inconsistent.

[0039] The standard parts used in this utility model can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and drawings. The specific connection methods of each part adopt conventional means such as bolts, rivets, welding, and bonding in the existing technology, which will not be described in detail here.

[0040] The above content is only a preferred embodiment of the present invention. For ordinary technicians in this field, various changes and variations can be made in the specific implementation methods and application scope based on the concept of the present invention. The content of this specification should not be understood as a limitation of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A locking bolt comprising a body, the body comprising a nut and a screw extending downwardly from the bottom of the nut, characterized in that: The integrally formed sleeve on the screw rod is provided with an elastic gasket, which is elastic and arranged close to the nut. A high friction section for preventing loosening is provided between the elastic gasket and the nut.

2. The anti-loosening bolt according to claim 1, characterized in that: The high friction section is the height of the screw corresponding to the top surface of the elastic gasket to the bottom surface of the nut. During the tightening process, the elastic gasket is deformed, and the elastic gasket generates a high friction force acting on the screw through the high friction section. After tightening, the elastic gasket is concavely deformed in the direction away from the nut, and the bottom surface of the nut and the top surface of the elastic gasket are in contact and connected.

3. The anti-loosening bolt according to claim 1, characterized in that: The screw comprises a non-threaded section and a variable pitch threaded section. The elastic gasket is arranged on the non-threaded section. The variable pitch threaded section comprises a plurality of external threads integrally arranged on the screw, and the distance between the external threads varies layer by layer.

4. The anti-loosening bolt according to claim 3, characterized in that: It also includes a nut that cooperates with the main body. A nut hole is provided in the nut. The inner wall of the nut hole is provided with a chamfer and an internal thread. The inner wall of the chamfer is inclined inward. The deformed elastic gasket is located in the chamfer, and the external thread and the internal thread are screwed together.

5. The anti-loosening bolt according to claim 4, characterized in that: After the main body is taken out from the nut hole, the elastic gasket returns to its original shape under the action of elastic force.

6. The anti-loosening bolt according to claim 1, characterized in that: The height of the high friction section is less than 1 cm.

7. The anti-loosening bolt according to claim 4, characterized in that: The outer diameter of the elastic gasket is greater than or equal to the outer diameter of the upper surface of the nut.

8. The anti-loosening bolt according to claim 1, characterized in that: The elastic gasket and the screw rod are detachably connected.

9. The anti-loosening bolt according to claim 4, characterized in that: At least one needle body for increasing friction is provided at any position on the external thread, and the end of the needle body is in contact with the internal thread to generate friction. One end of the needle body is fixed on the screw rod, and the other end of the needle body extends outward. The length of the needle body extending outward is greater than the length of the external thread extending outward.

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