Lock bolt and nut assembly

Abstract

The utility model discloses an anti-loose bolt and nut assembly which comprises a bolt and a main nut, the bolt comprises a bolt head, a main screw fixedly connected with the bolt head and an anti-loose screw fixedly connected with the main screw, the main screw and the anti-loose screw are opposite in thread turning direction, the main nut is in threaded connection with the main screw, the anti-loose screw is in threaded connection with the anti-loose nut, and the main nut is fixedly connected with the main screw. The lower end of the main nut and the upper end of the lock nut are provided with lock helical teeth which are matched with each other. According to the utility model, the main screw rod and the anti-loosening screw rod are opposite in thread screwing direction, and the main nut and the anti-loosening nut are provided with the anti-loosening helical teeth on the relatively close surfaces, so that the main nut can achieve the anti-loosening effect, and the anti-loosening nut also achieves the anti-loosening effect, thereby ensuring that the main nut does not loosen for a long time, the work is stable and reliable, the anti-loosening effect is good, and the use is convenient; production and manufacturing can be achieved, and good practicability is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical connection fasteners, in particular to an anti-loosening bolt and nut assembly. Background Art

[0002] The existing bolt and nut assembly consists of a bolt with an external thread and a nut with an internal thread. It is easy to install and disassemble, but has poor anti-loosening, anti-falling and anti-vibration functions.

[0003] In various equipment and devices such as mechanical devices, bridge piers, towers, ships, automobiles, and aircraft, fasteners are often used to connect two or more parts to each other. Bolt and nut assemblies are commonly used fasteners. At present, most bolt and nut assemblies are connected and fastened by ordinary bolts and nuts, that is, ordinary bolt pairs. If the bolt and nut are connected and fastened by bolt pairs, if vibration or impact is continuously applied to the joint part from the outside when the bolt and nut are combined, the bolt and nut may gradually loosen in the opposite direction of the threaded connection. The loosening problem of ordinary bolt pairs is very serious and often causes major accidents. If it is not discovered and repaired in time, it will lead to loose connections or bolts and nuts falling off. Major safety accidents will occur, causing immeasurable losses. To address this problem, at present, anti-loosening bevel teeth are generally set on the bolts and nuts, or anti-loosening washers are set between the bolts and nuts. Although this can play a certain role in preventing loosening, it will still loosen when it is subjected to vibration or impact for a long time. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the defects of the above-mentioned technology and provide an anti-loosening bolt and nut assembly.

[0005] In order to solve the above technical problems, the technical solution provided by the utility model is an anti-loosening bolt and nut assembly: including a bolt and a main nut, the bolt including a bolt head, a main screw connected to the bolt head, and an anti-loosening screw connected to the main screw, the thread rotation direction of the main screw and the anti-loosening screw is opposite, the main nut is threadedly connected to the main screw, the anti-loosening screw is threadedly connected with an anti-loosening nut, and the lower end of the main nut and the upper end of the anti-loosening nut are provided with anti-loosening bevel teeth that cooperate with each other.

[0006] Furthermore, the diameter of the main screw is larger than the diameter of the anti-loosening screw, the lower part of the anti-loosening nut is provided with a threaded hole matching the thread on the anti-loosening screw, and the upper part of the anti-loosening nut is provided with a through hole penetrating the threaded hole, and the diameter of the through hole is larger than the outer diameter of the main screw to adapt to different thickness requirements.

[0007] The advantages of the utility model compared with the prior art are: the utility model has the following advantages: the main nut can be prevented from loosening by the anti-loosening helical tooth design of the main screw and the anti-loosening screw threads being in opposite rotation directions and the main nut and the anti-loosening nut being relatively close to each other, and the anti-loosening nut can also be prevented from loosening at the same time, thereby ensuring that the main nut will not loosen for a long time, working stably and reliably, having a good anti-loosening effect, being easy to use, capable of being produced and manufactured, and having good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a schematic diagram of the structure of a bolt and nut assembly to prevent loosening of the utility model. Figure 1 .

[0009] Figure 2 This is a schematic diagram of the structure of a bolt and nut assembly to prevent loosening of the utility model. Figure 2 .

[0010] Figure 3 The utility model is a structural schematic diagram of a bolt of an anti-loosening bolt and nut assembly.

[0011] Figure 4 The utility model is a structural schematic diagram of a main nut of an anti-loosening bolt and nut assembly.

[0012] Figure 5 The utility model is a structural schematic diagram of a locking nut of a locking bolt and nut assembly.

[0013] As shown in the figure:

[0014] 1. Bolt head, 2. Main screw, 3. Anti-loosening screw, 4. Main nut, 5. Anti-loosening nut, 6. Anti-loosening bevel teeth, 7. Through hole. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0016] Embodiment 1, in combination with Figure 1-5A kind of anti-loosening bolt and nut assembly, including a bolt and a main nut 4. The bolt includes a bolt head 1, a main screw 2 fixedly connected to the bolt head 1, and an anti-loosening screw 3 fixedly connected to the main screw 2. The threads on the main screw 2 and the anti-loosening screw 3 have opposite rotation directions. The main nut 4 is threadedly connected to the main screw 2. The anti-loosening screw 3 is threadedly connected with an anti-loosening nut 5. The lower end of the main nut 4 and the upper end of the anti-loosening nut 5 are provided with anti-loosening bevel teeth 6 that cooperate with each other. When in use, design the length of the main screw 2 according to needs, pass the bolt through the connecting holes of the two workpieces to be connected, first screw the main screw 2 on the main screw 2 and tighten it. At this time, the lower end of the main screw 2 has not extended out of the main nut 4. Then screw the anti-loosening nut 5 on the anti-loosening screw 3 and tighten it so that the anti-loosening bevel teeth 6 on the anti-loosening nut 5 are engaged with the anti-loosening bevel teeth 6 on the main nut 4. At this time, when the main nut 4 tends to loosen, the anti-loosening bevel teeth 6 thereon will tend to drive the anti-loosening nut 5 to move. Because the main nut 4 and the anti-loosening nut 5 have opposite rotation directions when loosening, the anti-loosening nut 5 will prevent the main nut 4 from loosening, thereby achieving the purpose of preventing loosening. At the same time, when the anti-loosening nut 5 tends to loosen, the main nut 4 will also prevent the anti-loosening nut 5 from loosening, thereby achieving a good anti-loosening effect.

[0017] The main screw 2 and the anti-loosening screw 3 are coaxial, so it is easy to use, and the bolt is evenly stressed and not easy to break.

[0018] The diameter of the main screw 2 is larger than the diameter of the anti-loosening screw 3, thereby ensuring that the main nut 4 can easily pass through the anti-loosening screw 3 and then be connected to the main screw 2. The lower part of the anti-loosening nut 5 is provided with a threaded hole matching the thread on the anti-loosening screw 3, and the upper part of the anti-loosening nut 5 is provided with a through hole 7 penetrating the threaded hole. The diameter of the through hole 7 is larger than the outer diameter of the main screw 2. When the anti-loosening nut 5 is screwed, the through hole 7 on the upper part of the anti-loosening nut 5 can be partially sleeved on the main screw 2, so that even if the main screw 2 extends a short length from the main nut 4 when tightening the main nut 4, the anti-loosening bevel teeth 6 on the anti-loosening nut 5 can be engaged with the anti-loosening bevel teeth 6 on the main nut 4 when screwing the anti-loosening nut 5, which meets the connection requirements of workpieces of different thicknesses and has stronger applicability.

[0019] The main screw 2 adopts a right-handed thread, and the anti-loosening screw 3 adopts a left-handed thread.

[0020] In the description of the embodiments of the present utility model, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate an orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, it is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0021] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0022] In the description of the embodiments of the present invention, "multiple" means at least 2.

[0023] In the description of the embodiments of the present utility model, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 indirectly connected 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 utility model can be understood according to specific circumstances.

[0024] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.

Claims

1. An anti-loosening bolt and nut assembly, comprising a bolt and a main nut (4), characterized in that: The bolt comprises a bolt head (1), a main screw (2) fixedly connected to the bolt head (1), and an anti-loosening screw (3) fixedly connected to the main screw (2); the main screw (2) and the anti-loosening screw (3) have threads with opposite rotation directions; the main nut (4) is threadedly connected to the main screw (2); the anti-loosening screw (3) is threadedly connected to an anti-loosening nut (5); and the lower end of the main nut (4) and the upper end of the anti-loosening nut (5) are provided with anti-loosening bevel teeth (6) that cooperate with each other.

2. The anti-loosening bolt and nut assembly according to claim 1, characterized in that: The main screw (2) and the anti-loosening screw (3) are coaxial.

3. An anti-loosening bolt and nut assembly according to any one of claim 2, characterized in that: The diameter of the main screw (2) is greater than the diameter of the anti-loosening screw (3); the lower part of the anti-loosening nut (5) is provided with a threaded hole matching the thread on the anti-loosening screw (3); the upper part of the anti-loosening nut (5) is provided with a through hole (7) penetrating the threaded hole; the diameter of the through hole (7) is greater than the outer diameter of the main screw (2).

4. An anti-loosening bolt and nut assembly according to any one of claims 1 to 3, characterized in that: The main screw (2) has a right-handed thread, and the anti-loosening screw (3) has a left-handed thread.

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