Self-adjusting anti-displacement railway embedded part

Abstract

The utility model relates to the technical field of embedded parts, in particular to a self-adjusting anti-displacement railway embedded part which comprises a bolt head and a bolt rod, the surface of the bolt rod is in threaded connection with a nut, the top of the bolt rod is rotationally connected with a positioning block, an elastic part is connected between the positioning block and the nut, and the elastic part is connected with the bolt rod. A polygonal insert block is movably inserted into the surface of the positioning block and used for connecting the positioning block and the bolt rod, a polygonal through hole matched with the polygonal insert block is formed in the surface of the positioning block, and a polygonal embedding groove allowing the polygonal insert block to be embedded is formed in the top end of the bolt rod in a matched mode. The groove type embedded part aims at solving the problems that a traditional groove type embedded part lacks targeted anti-vibration design mechanisms such as elastic pre-tightening compensation and the like, and looseness caused by vibration cannot be restrained in real time.

Description

Technical Field

[0001] This utility model relates to the field of embedded parts technology, specifically a self-adjusting anti-displacement railway embedded part. Background Technology

[0002] Railway embedded parts are components pre-embedded in concrete structures during railway engineering construction. Their core function is to provide a reliable connection foundation for equipment such as track systems, overhead contact lines, and sound barriers, ensuring a stable connection between each component and the main structure. They must meet the stringent requirements of high-intensity loads, high-frequency vibrations, and complex environments encountered during railway operation. These embedded parts need to possess high strength, durability, high-precision positioning, and a certain degree of displacement adjustment capability. Among the many types of railway embedded parts, channel-type embedded parts, with their unique structural design, have become the preferred solution for handling dynamic loads and deformation scenarios. Through the cooperation of the channel-shaped body and sliding connectors, they achieve flexible adjustment of the installation position, effectively compensating for the shortcomings of traditional bolt-type or steel plate-type embedded parts in terms of adaptability. Channel-type embedded parts are a crucial component of railway embedded parts. To further refine the types, while adhering to the general technical standards for railway embedded parts, they also supplement the functions with dedicated channel structures and sliding adjustment mechanisms. The main channel of the channel-type embedded part is mostly made of Q345B steel or stainless steel, with a U-shaped cross section. The toothed design on the inner wall enhances the interlocking ability with the connecting parts, and the surface anti-corrosion treatment ensures long-term weather resistance. The anchors are formed by ribbed steel bars or angle steel welded to the back of the channel, which mechanically grip the concrete and evenly transfer the load to the base. The T-bolt, as the core connecting part, can slide freely along the channel and rotate to lock. Together with nuts and washers, it enables precise installation and fine adjustment of the equipment. These components work together to give the channel-type embedded part the dual advantages of stable anchoring and dynamic adjustment, becoming a key technical support for dealing with complex working conditions in modern railway construction.

[0003] In actual railway operation scenarios, existing channel-type embedded parts are subjected to continuous and high-frequency vibration impacts generated by train operation. Under this dynamic load, the vibration energy is continuously transmitted to the embedded part structure, causing the friction between the nut and the bolt thread pair to gradually decrease, making it difficult to maintain the initial tightness and thus easily leading to loosening. Since traditional channel-type embedded parts lack targeted anti-vibration design mechanisms such as elastic pre-tightening compensation, they cannot suppress the loosening caused by vibration in real time, which will greatly increase the cost and frequency of later maintenance. Utility Model Content

[0004] The purpose of this utility model is to provide a self-adjusting anti-displacement railway pre-embedded part to solve the problem that traditional grooved pre-embedded parts lack targeted anti-vibration design mechanisms such as elastic pre-tightening compensation, and cannot suppress loosening caused by vibration in real time.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A self-adjusting anti-displacement railway embedded part includes a bolt head and a bolt shank. A nut is threaded onto the surface of the bolt shank, and a positioning block is rotatably connected to the top of the bolt shank. An elastic element is connected between the positioning block and the nut. A polygonal insert is movably inserted onto the surface of the positioning block, and the polygonal insert is used to connect the positioning block and the bolt shank.

[0007] Preferably, the surface of the positioning block has polygonal through holes adapted to the polygonal insert, and the top of the bolt rod has a polygonal groove for the polygonal insert to be inserted.

[0008] Preferably, it also includes a groove, which has a slot adapted to fit the bolt head.

[0009] Preferably, there are multiple elastic elements, and the multiple elastic elements are arranged in a circular array with the bolt rod as the axis.

[0010] Preferably, it also includes anchors, which are fixedly connected to the groove.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. By storing preload through the elastic element, when vibration occurs, the elastic element continuously applies axial pressure to the nut, which couples with the friction of the thread pair to form a resistance torque that prevents the nut from rotating in the opposite direction, automatically offsetting the loosening displacement caused by vibration, and realizing the self-adjusting anti-displacement function;

[0013] 2. By inserting polygonal inserts into the polygonal holes of the positioning block and the polygonal grooves of the bolt rod, the relative rotation of the positioning block and the bolt rod is locked through shape matching, ensuring that the preload is stably maintained and avoiding preload failure due to rotation. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the overall vertical section of this utility model;

[0016] Figure 3 This is a schematic diagram of the bolt rod of this utility model;

[0017] Figure 4 This is a schematic diagram of the positioning block of this utility model;

[0018] Figure 5 This is a schematic diagram of the polygonal insert of this utility model.

[0019] In the diagram: 1. Bolt head; 2. Bolt shank; 3. Polygonal groove; 4. Polygonal insert; 5. Polygonal perforation; 6. Positioning block; 7. Elastic element; 8. Nut; 9. Groove; 10. Anchor. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figures 1 to 5 This utility model provides a technical solution.

[0022] A self-adjusting anti-displacement railway embedded part includes a T-bolt, which includes a bolt head 1 and a bolt shank 2. The bolt shank 2 and the bolt head 1 are fixedly connected. A nut 8 is threaded onto the surface of the bolt shank 2. A positioning block 6 is rotatably connected to the top of the bolt shank 2. An elastic element 7 is connected between the positioning block 6 and the nut 8. There are multiple elastic elements 7, and the multiple elastic elements 7 are arranged in a ring array with the bolt shank 2 as the axis. A polygonal insert 4 is movably inserted into the surface of the positioning block 6. The polygonal insert 4 is used to limit the relative rotation between the positioning block 6 and the bolt shank 2.

[0023] The surface of the positioning block 6 is provided with a polygonal through hole 5 that is adapted to the polygonal insert 4. The top of the bolt rod 2 is provided with a polygonal groove 3 for the polygonal insert 4 to be inserted. The contours of the polygonal groove 3 and the polygonal through hole 5 are matched with the shape of the insert 4. When the positioning block 6 rotates until the through hole 5 is aligned with the groove 3, the insert 4 is passed through the through hole 5 and inserted into the groove 3 in sequence, thereby realizing the detachable limiting connection between the bolt rod 2 and the positioning block 6, effectively limiting the rotation of the positioning block 6 relative to the bolt rod 2.

[0024] It also includes a groove 9, which has a slot that fits the bolt head 1. The bolt head 1 of the T-bolt is inserted into the slot of the groove 9. After sliding the bolt rod 2 to the designed position, the nut 8 is tightened to press it against the upper surface of the groove 9, completing the fixation between the T-bolt and the groove 9. A positioning block 6 is rotatably mounted on the top of the bolt rod 2. Below the positioning block 6 and between it and the nut 8, there are elastic elements 7 arranged in a ring array. By rotating the positioning block 6, the elastic elements 7 are stretched to generate an axial preload. This preload is transmitted to the nut 8 through the elastic elements 7, maintaining its pressure on the groove 9.

[0025] After the elastic element 7 is pre-tightened to the set load, the positioning block 6 is rotated in the same direction to adjust the angle so that the polygonal through hole 5 of the positioning block 6 is aligned with the polygonal groove 3 at the top of the bolt rod 2. Then, the polygonal insert 4 is inserted into the through hole 5 and embedded in the groove 3. The relative rotation between the positioning block 6 and the bolt rod 2 is locked by the shape fit. By designing the number of sides of the polygon, the required rotation angle in the same direction of the positioning block 6 after the elastic element 7 is pre-tightened to the set load can be determined. The more sides there are, the smaller the angle that the positioning block 6 needs to continue to rotate in the same direction after the pre-tightening is completed.

[0026] When external vibration causes the nut 8 to loosen, the preload stored in the elastic element 7 continuously applies axial pressure to the nut 8. This pressure is coupled with the friction of the threaded pair to form a resistance torque that prevents the nut 8 from rotating in the opposite direction, thereby automatically offsetting the loosening displacement caused by vibration and realizing the self-adjusting anti-displacement function.

[0027] It also includes anchors 10, which are fixedly connected to the groove 9.

[0028] The specific steps of this solution are as follows: Insert the bolt head 1 of the T-bolt into the slot of the groove 9, slide the bolt rod 2 to the designed position, tighten the nut 8 to press it against the upper surface of the groove 9, thus fixing the T-bolt to the groove 9. The positioning block 6 is fitted onto the top of the bolt rod 2. By rotating the positioning block 6, the elastic elements 7 distributed in a ring array between it and the nut 8 are stretched, generating an axial preload. This preload is transmitted to the nut 8 through the elastic elements 7, keeping the nut 8 pressing against the groove 9. When the elastic elements 7 are preloaded to the set load, rotate the positioning block 6 in the same direction to adjust the angle, so that the polygonal through hole 5 on the surface of the positioning block 6 is aligned with the polygonal groove 3 at the top of the bolt rod 2. Then, insert the polygonal insert 4 into the through hole 5 and embed it into the groove 3. The relative rotation of the positioning block 6 and the bolt rod 2 is locked by the shape fit to prevent the preload from being lost.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A self-adjusting anti-displacement railway embedded part, comprising a bolt head (1) and a bolt shank (2), characterized in that: The bolt rod (2) is threaded with a nut (8) and a positioning block (6) is rotatably connected to the top of the bolt rod (2). An elastic element (7) is connected between the positioning block (6) and the nut (8). A polygonal insert (4) is movably inserted on the surface of the positioning block (6) and the polygonal insert (4) is used to connect the positioning block (6) and the bolt rod (2).

2. The self-adjusting anti-displacement railway embedded part according to claim 1, characterized in that, The surface of the positioning block (6) is provided with polygonal through holes (5) that are adapted to the polygonal insert (4), and the top of the bolt rod (2) is provided with a polygonal groove (3) for the polygonal insert (4) to be inserted.

3. The self-adjusting anti-displacement railway embedded part according to claim 1, characterized in that, It also includes a groove (9) which has a slot that is adapted to fit the bolt head (1).

4. The self-adjusting anti-displacement railway embedded part according to claim 1, characterized in that, The number of elastic elements (7) is multiple, and the multiple elastic elements (7) are arranged in a ring array with the bolt rod (2) as the axis.

5. The self-adjusting anti-displacement railway embedded part according to claim 3, characterized in that, It also includes anchors (10), which are fixedly connected to the groove (9).

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