Anti-loosening bolt with high fastening stability

Abstract

The utility model relates to an anti-loosening bolt with high fastening stability, which comprises a screw rod and a screw cap, the screw rod and the screw cap are integrally arranged, a thread part is arranged on the periphery of the screw rod, a self-locking nut is arranged on the periphery of the screw rod, the self-locking nut can be in threaded fit with the thread part, one end of the self-locking nut is provided with a locking part, and the other end of the self-locking nut is provided with a locking nut. The locking part is used for applying radial elastic force to the screw rod, a containing groove is formed in the end, away from the locking part, of the self-locking nut, a locking nut is arranged on the periphery of the screw rod, the locking nut can be in threaded fit with the threaded part, one end of the locking nut extends to the containing groove, and the other end of the locking nut extends out of the containing groove to serve as a rotating end. The bolt has the following advantages and effects that the fastening stability of the bolt in the long-term use process can be improved, and the bolt is effectively prevented from falling off due to looseness.

Description

Technical Field

[0001] The utility model relates to the technical field of bolts, in particular to an anti-loosening bolt with high fastening stability. Background Art

[0002] A bolt usually consists of two parts, the upper part is the nut, which is used to tighten or unscrew the bolt when in use, and the lower part is the screw, which is a cylinder with threads on the outer surface. When in use, it is usually combined with a nut, and the bolt is fixed or removed through the threaded connection between the nut and the screw. It is widely used in the connection and fixation of mechanical parts.

[0003] For example, a Chinese patent document with publication number CN219139604U discloses an anti-retreat bolt, which is composed of a fixed section, a connecting section and a nut section in sequence along the axial direction; the nut section is fixed with an anti-retreat ring, and the anti-retreat ring is provided with at least one notch, and the notch cooperates with a stop washer to limit the anti-retreat bolt.

[0004] In the above technical solution, the notch on the anti-retreat ring of the anti-retreat bolt cooperates with the protrusion on the stop washer, and the protrusion fixes the notch so that the anti-retreat bolt will not rotate axially, preventing the anti-retreat bolt from falling off due to vibration.

[0005] However, the inventors have found in the process of long-term use that the stop washer is easily affected by external factors and causes problems such as aging, thereby affecting the anti-loosening effect of the bolt during long-term use. Summary of the invention

[0006] In view of the deficiencies in the prior art, the purpose of the utility model is to provide an anti-loosening bolt with high tightening stability, which can improve the stability of bolt tightening during long-term use and effectively prevent the bolt from falling off due to loosening.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an anti-loosening bolt with high tightening stability, comprising a screw and a nut, the screw and the nut are integrally arranged, a threaded portion is provided on the outer periphery of the screw, a self-locking nut is provided on the outer periphery of the screw, the self-locking nut can form a threaded fit with the threaded portion, a locking portion is provided at one end of the self-locking nut, the locking portion is used to apply radial elastic force to the screw, a receiving groove is provided at the end of the self-locking nut away from the locking portion, a locking nut is provided on the outer periphery of the screw, the locking nut can form a threaded fit with the threaded portion, one end of the locking nut extends to the receiving groove, and the other end extends outside the receiving groove as a rotating end.

[0008] The utility model is further configured as follows: the threaded portion comprises a forward thread and a reverse thread, the forward thread and the reverse thread are in opposite directions to each other and are connected to each other.

[0009] The utility model is further configured as follows: the self-locking nut and the locking nut respectively form thread matching with the forward thread and the reverse thread.

[0010] The utility model is further configured as follows: the self-locking nut and the locking nut respectively form thread matching with the reverse thread and the forward thread.

[0011] The utility model is further configured to include an anti-loosening spring washer, wherein the anti-loosening spring washer is located below the nut.

[0012] The utility model is further configured as follows: the upper surface and the lower surface of the anti-loosening spring washer are both provided with anti-loosening grooves, and the anti-loosening grooves are multiple and evenly distributed along the circumference.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] By providing a self-locking nut and a locking nut, after the self-locking nut and the locking nut are screwed into the screw together, the tightening and mutual pressure generated by the contact between the self-locking nut and the locking nut can prevent the screw from loosening and play an anti-loosening effect. Compared with rubber washers, since the self-locking nut and the locking nut are generally made of plastic or metal materials, they can ensure the stability of their own performance during long-term use. Therefore, the technical problem that the anti-loosening stability is easily affected by the aging of the stop washer during long-term use in the prior art is effectively solved, thereby improving the stability of bolt tightening during long-term use, effectively preventing the bolt from falling off due to loosening, and the locking part on one side of the self-locking nut can be stretched open after the self-locking nut is screwed into the screw, so that the locking part can exert radial elastic force on the screw due to deformation, thereby further preventing the screw from loosening. In addition, by extending one end of the locking nut outside the accommodating groove as a rotating end, it is convenient to screw the locking nut. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the explosion structure of the utility model. DETAILED DESCRIPTION

[0017] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0019] like Figure 1 to Figure 2 As shown, the utility model discloses an anti-loosening bolt with high tightening stability, including a screw rod 1 and a nut 2, the screw rod 1 and the nut 2 are arranged in one piece, a threaded portion 3 is arranged on the outer periphery of the screw rod 1, a self-locking nut 4 is arranged on the outer periphery of the screw rod 1, the self-locking nut 4 can form a threaded match with the threaded portion 3, a locking portion 41 is arranged at one end of the self-locking nut 4, the locking portion 41 is made of an elastic material, such as plastic, the locking portion 41 is used to apply radial elastic force to the screw rod 1, the self-locking nut 4 is located at an end away from the locking portion 41 and is provided with a receiving groove 42, a locking nut 5 is arranged on the outer periphery of the screw rod 1, the locking nut 5 can form a threaded match with the threaded portion 3, one end of the locking nut 5 extends to the receiving groove 42, and the other end extends outside the receiving groove 42 as a rotating end 51, when the self-locking nut 4 and the locking nut 5 are screwed into the screw rod together 1, the self-locking nut 4 and the locking nut 5 are tightened against each other and pressed against each other after contacting each other, so as to prevent the screw 1 from loosening and play an anti-loosening effect. Compared with the rubber gasket, since the self-locking nut 4 and the locking nut 5 are generally made of plastic or metal materials, they can ensure the stability of their own performance during long-term use, thereby improving the stability of bolt tightening during long-term use, and effectively preventing the bolt from falling off due to loosening. In addition, the locking portion 41 on one side of the self-locking nut 4 can be stretched open after the self-locking nut 4 is screwed into the screw 1, so that the locking portion 41 can apply radial elastic force to the screw 1 due to deformation, so as to further prevent the screw 1 from loosening. In addition, by extending one end of the locking nut 5 to the outside of the accommodating groove 42 as the rotating end 51, it is convenient to screw the locking nut 5.

[0020] In this embodiment, the threaded portion 3 includes a forward thread 31 and a reverse thread 32, and the forward thread 31 and the reverse thread 32 are in opposite directions and connected to each other. Since the bolt will move along the thread after being vibrated, thereby causing loosening, the self-locking nut 4 and the locking nut 5 are threadedly matched with the forward thread 31 and the reverse thread 32 respectively, or the self-locking nut 4 and the locking nut 5 are threadedly matched with the reverse thread 32 and the forward thread 31 respectively. When subjected to vibration, since the threads of the self-locking nut 4 and the locking nut 5 are connected in opposite directions, the self-locking nut 4 and the locking nut 5 that are in contact with each other will generate a movement tendency in opposite directions, so that the friction generated between the two can hinder the self-locking nut 4 and the locking nut 5 from moving along the direction of the thread, thereby further preventing the bolt from loosening.

[0021] In this embodiment, an anti-loosening spring washer 6 is further provided between the nut 2 and the contact surface. The anti-loosening spring washer 6 is located below the nut 2. The upper and lower surfaces of the anti-loosening spring washer 6 are provided with anti-loosening grooves 61. There are multiple anti-loosening grooves 61 and they are evenly distributed around the circumference. Therefore, after the screw 1 is screwed in until the nut 2 can squeeze the anti-loosening spring washer 6, the elastic force generated by the deformation of the anti-loosening spring washer 6 can hinder the rotation of the screw 1, thereby further preventing the bolt from loosening. Therefore, by locking the nut 2, the self-locking nut 4, the forward thread 31, the reverse thread 32 and the anti-loosening spring washer 6, the stability of the bolt tightening can be greatly improved, and loosening can be effectively prevented.

[0022] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. An anti-loosening bolt with high fastening stability, characterized in that: It includes a screw and a nut, which are arranged integrally, a threaded portion is provided on the outer periphery of the screw, a self-locking nut is provided on the outer periphery of the screw, the self-locking nut can form a threaded fit with the threaded portion, a locking portion is provided at one end of the self-locking nut, the locking portion is used to apply radial elastic force to the screw, a receiving groove is provided at the end of the self-locking nut away from the locking portion, a locking nut is provided on the outer periphery of the screw, the locking nut can form a threaded fit with the threaded portion, one end of the locking nut extends to the receiving groove, and the other end extends outside the receiving groove as a rotating end.

2. The anti-loosening bolt with high fastening stability according to claim 1, characterized in that: The threaded portion includes a forward thread and a reverse thread, the forward thread and the reverse thread are in opposite directions and are connected to each other.

3. The anti-loosening bolt with high fastening stability according to claim 2, characterized in that: The self-locking nut and the locking nut respectively form thread cooperation with the forward thread and the reverse thread.

4. The anti-loosening bolt with high fastening stability according to claim 2, characterized in that: The self-locking nut and the locking nut respectively form thread cooperation with the reverse thread and the forward thread.

5. The anti-loosening bolt with high fastening stability according to claim 1, characterized in that: Also included is an anti-loosening spring washer, which is located below the nut.

6. The anti-loosening bolt with high fastening stability according to claim 5, characterized in that: The upper surface and the lower surface of the anti-loosening spring washer are both provided with anti-loosening grooves, and the anti-loosening grooves are multiple and evenly distributed along the circumference.

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