A bidirectional self-locking anti-loose bolt assembly
By designing a two-way self-locking anti-loosening bolt assembly, and utilizing structures such as stabilizing teeth, limiting pads, and springs, the problem of traditional bolts loosening in vibration environments is solved, achieving stable connection and improved durability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CCCC ROAD & BRIDGE SPECIAL ENG
- Filing Date
- 2025-07-07
- Publication Date
- 2026-07-10
AI Technical Summary
Traditional bolts are prone to loosening under harsh environments and vibration conditions, leading to wear and failure of parts, making it difficult to keep them tight and increasing equipment downtime for maintenance.
The system employs a two-way self-locking anti-loosening bolt assembly. The annular stabilizing teeth on the bottom of the bolt cap increase friction to prevent circumferential rotation. The limiting pad and limiting groove work together to restrict axial movement. The spring provides elastic preload. Combined with rubber material and anti-corrosion paint, the connection stability and durability are improved.
It effectively prevents bolts from loosening, enhances connection stability, reduces the impact of vibration, extends equipment service life, and protects the surface of the connecting parts.
Smart Images
Figure CN224479149U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of bolt technology, specifically a bidirectional self-locking anti-loosening bolt assembly. Background Technology
[0002] Bolts, as an important component of mechanical parts, are a type of fastener consisting of a head and a threaded cylinder. They need to be used with a nut to fasten two parts with through holes. This type of connection is called a bolted connection. If the nut is screwed into the bolt from one side of the head, there is no need to tap the connected parts. The operation is convenient and can be disassembled multiple times. Bolts are widely used in many fields such as industry, construction and transportation.
[0003] Loosening of traditional bolts can cause wear, abnormal noise, and even malfunctions in parts. When large industrial machinery is in operation, the harsh working environment and large vibration amplitude make it difficult for ordinary bolts to remain tight, increasing downtime for equipment maintenance. Therefore, those skilled in the art have provided a bidirectional self-locking anti-loosening bolt assembly to solve the problems mentioned in the background art. Utility Model Content
[0004] The purpose of this invention is to provide a bidirectional self-locking anti-loosening bolt assembly to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] A bidirectional self-locking anti-loosening bolt assembly includes a lead screw, a lead screw cap connected to the upper surface of the lead screw, a ring of stabilizing teeth installed on the bottom surface of the lead screw cap, a limiting pad sleeved on the outside of the lead screw, and a limiting groove formed on the bottom surface of the lead screw cap.
[0007] As a further improvement of this utility model: a limiting block is installed on the upper surface of the limiting pad, and the limiting block is adapted to the limiting groove.
[0008] As a further improvement of this utility model: a tightening groove is provided on the upper surface of the screw cap, and a spring is sleeved on the outside of the screw rod.
[0009] As a further improvement of this utility model: a gasket is sleeved on the outside of the lead screw, and the outside of the lead cap is coated with anti-corrosion paint.
[0010] As a further improvement of this utility model: the limiting pad is made of rubber, and the outer surface of the lead screw is provided with a threaded groove.
[0011] As a further improvement of this utility model: each of the stabilizing teeth is conical, and the outer surface of each of the stabilizing teeth is connected with an electroplated layer.
[0012] Compared with the prior art, the beneficial effects of this utility model are:
[0013] This bidirectional self-locking anti-loosening bolt assembly features a tapered, ring-shaped stabilizing tooth on the bottom of the screw cap that embeds into the connecting surface, increasing friction and preventing circumferential rotation. An electroplated layer enhances wear and corrosion resistance. A limiting block on the limiting pad matches the limiting groove of the screw cap, and the elastic deformation of the rubber material restricts axial movement of the screw cap, enhancing connection stability. A spring on the screw rod sleeve provides elastic preload, continuously counteracting loosening caused by vibration. Gaskets distribute pressure and protect the surfaces of the connected components. An anti-corrosion paint finish extends the assembly's service life in harsh environments. Attached Figure Description
[0014] Figure 1 A three-dimensional structural diagram of a bidirectional self-locking anti-loosening bolt assembly;
[0015] Figure 2 A bottom view of a bidirectional self-locking anti-loosening bolt assembly;
[0016] Figure 3 This is a top view of a bidirectional self-locking anti-loosening bolt assembly;
[0017] Figure 4 This is a cross-sectional view of the nail head in a bidirectional self-locking anti-loosening bolt assembly.
[0018] In the diagram: 1. Lead screw; 2. Lead nut; 3. Stabilizing tooth; 4. Limiting groove; 5. Limiting pad; 6. Limiting block; 7. Tightening groove; 8. Washer; 9. Spring. Detailed Implementation
[0019] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0021] Please see Figures 1-4 In this embodiment of the utility model, a bidirectional self-locking anti-loosening bolt assembly includes a lead screw 1, a lead screw cap 2 connected to the upper surface of the lead screw 1, a ring-shaped stabilizing tooth 3 installed on the bottom surface of the lead screw cap 2, a limiting pad 5 sleeved on the outside of the lead screw 1, and a limiting groove 4 opened on the bottom surface of the lead screw cap 2. Through the synergistic effect of multiple structures, the assembly has reliable anti-loosening performance in mechanical connection, and is suitable for scenarios with frequent vibration or requiring long-term stable connection.
[0022] A limiting block 6 is installed on the upper surface of the limiting pad 5. The limiting block 6 is adapted to the limiting groove 4. A tightening groove 7 is opened on the upper surface of the screw cap 2. A spring 9 is sleeved on the outside of the screw rod 1. It can not only continuously counteract the loosening tendency caused by vibration, but also limit the movement of the screw cap shaft 2.
[0023] The lead screw 1 is fitted with a washer 8, the lead nut 2 is coated with anti-corrosion paint, the limiting washer 5 is made of rubber, the outer surface of the lead screw 1 is provided with a threaded groove, each stabilizing tooth 3 is conical, and the outer surface of each stabilizing tooth 3 is connected with an electroplated layer, which not only makes the screw uniformly anti-corrosion and wear-resistant, but also prevents the screw from loosening during use.
[0024] The working principle of this utility model is as follows: First, people can use tools to screw the screw cap 2 onto the threaded groove on the outer surface of the screw rod 1 through the tightening groove 7 on the upper surface of the screw cap 2, thus initially completing the fastening installation of the bolt assembly. During the process, the gasket 8 on the outside of the screw rod 1 can evenly distribute the pressure and protect the surface of the connected parts. The conical stabilizing teeth 3 arranged in a ring on the bottom surface of the screw cap 2 are embedded into the connecting surface during the tightening process, restricting the circumferential rotation of the screw cap 2. At the same time, the rubber limiting pad 5 is fitted on the screw rod 1, and the limiting block 6 on its surface is adapted to the limiting groove 4 on the bottom surface of the screw cap 2, restricting the axial movement of the screw cap 2 and realizing bidirectional self-locking. The spring 9 fitted on the outside of the screw rod 1 is compressed during the tightening process to generate elastic preload, continuously counteracting the loosening tendency caused by vibration and other factors.
[0025] The above description is merely a preferred embodiment of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalent elements of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.
[0026] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A bidirectional self-locking anti-loosening bolt assembly, characterized in that, Includes a lead screw (1), the upper surface of which is connected to a lead cap (2), the bottom surface of which is equipped with a ring-shaped stabilizing tooth (3), the lead screw (1) is fitted with a limiting pad (5), and the bottom surface of the lead cap (2) is provided with a limiting groove (4).
2. The bidirectional self-locking anti-loosening bolt assembly according to claim 1, characterized in that, The upper surface of the limiting pad (5) is fitted with a limiting block (6), which is adapted to the limiting groove (4).
3. The bidirectional self-locking anti-loosening bolt assembly according to claim 1, characterized in that, The upper surface of the screw cap (2) is provided with a tightening groove (7), and the outside of the screw rod (1) is provided with a spring (9).
4. The bidirectional self-locking anti-loosening bolt assembly according to claim 1, characterized in that, The lead screw (1) is fitted with a gasket (8) on its outside, and the lead cap (2) is coated with anti-corrosion paint.
5. A bidirectional self-locking anti-loosening bolt assembly according to claim 1, characterized in that, The limiting pad (5) is made of rubber, and the outer surface of the lead screw (1) is provided with a threaded groove.
6. The bidirectional self-locking anti-loosening bolt assembly according to claim 1, characterized in that, Each of the stabilizing teeth (3) is conical, and the outer surface of each of the stabilizing teeth (3) is connected with an electroplated layer.