Anti-seismic bolt with anti-loosening pad structure
By using anti-loosening pads and anti-vibration bolts, and utilizing regular polygonal channels and locking mechanisms to absorb vibration forces, the problem of loosening railway frog bolts has been solved, achieving stable connection and cost reduction.
Patent Information
- Application Number
- CN202520729703.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-17
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2035-04-17
AI Technical Summary
The bolts of existing railway frogs are prone to loosening due to vibration and impact during train operation, resulting in unstable connections. Existing anti-loosening measures are either ineffective or costly and may damage the bolts.
The anti-loosening bolt with anti-loosening washer structure includes a nut, bolt body, anti-loosening washer body and limiting plate. It absorbs vibration force through regular polygonal channels and locking mechanism to prevent the nut from loosening and avoid damage to the bolt.
It effectively prevents nuts from loosening, reduces the impact of vibration, has a simple structure that is easy to maintain, does not damage bolts, and reduces production costs.
Smart Images
Figure CN223794471U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of anti-seismic bolt technology, specifically an anti-seismic bolt with an anti-loosening pad structure. Background Technology
[0002] Railway frogs are a key component of railway turnouts, enabling trains to switch from one track to another. Frogs are typically located at the tip of the turnout and bear the immense pressure and impact of passing trains. Their stability and reliability are crucial for railway traffic safety. Currently, railway frogs are assembled from multiple parts. As trains continue to run, the frogs and their fixing bolts bear the weight and vibration of the trains over a long period. This long-term pressure and vibration can cause the connection between the bolts and nuts to gradually loosen, especially when trains pass over the frogs, where the impact and vibration further exacerbate the loosening of the bolts.
[0003] Existing bolts are often ordinary bolts, which do not have the ability to prevent loosening. Some anti-loosening bolts use small steel wires to fix them through holes, but the small steel wires are prone to breakage under the large load and vibration when a train passes by, so the anti-loosening effect is limited.
[0004] In addition, some anti-vibration bolts with protective pads can reduce the impact of vibration on nut loosening to a certain extent. However, in practical applications, their anti-vibration effect is not always ideal. Since the axial force on the nut and bolt is the greatest during vibration, the nut will gradually rotate in the opposite direction and loosen over time. Although there are some anti-vibration bolt structures with better performance on the market, such as Tang's thread bolts with special thread shapes, their thread processing is more difficult, resulting in high production costs. There are also some advanced anti-vibration protective pads, such as the Lodilock wedge locking system, which can prevent the nut from loosening to a large extent, but at the same time, they also damage the threads on the bolt and reduce its service life.
[0005] In view of the above, this application is hereby submitted. Utility Model Content
[0006] The purpose of this invention is to provide an anti-vibration bolt with an anti-loosening pad structure to solve the problems mentioned in the background art.
[0007] To solve the above-mentioned technical problems, this utility model provides an anti-seismic bolt with an anti-loosening washer structure, including a nut, a bolt body, an anti-loosening washer body, and a limiting plate. The nut and the limiting plate are sequentially threaded to the outside of the bolt body along the axial direction of the bolt body. The anti-loosening washer body is sleeved on the outer wall of the nut. The anti-loosening washer body includes a fixing part and an extension part. The fixing part of the anti-loosening washer body is coaxially arranged with the nut, the bolt body, and the limiting plate. A channel is provided at the top center of the fixing part, which is a regular polygonal structure, and the corner of the outer wall of the nut abuts against the corner of the inner wall of the channel. An extension part is provided at both opposite ends of the fixing part along the length direction. The end of the extension part away from the fixing part is bent toward the limiting plate. A groove is provided on the outer wall of the limiting plate at the position corresponding to the bent part of the anti-loosening washer body. The end of the bent part away from the fixing part is inserted into the groove.
[0008] Furthermore, a second channel, coaxial with the bolt body, is provided at the center of the side wall of the limiting plate near the nut. The first channel and the second channel are coaxially arranged. A locking mechanism is provided in the second channel. The locking mechanism includes a fixed plate rotatably connected to the end of the inner arc wall of the second channel away from the nut. A first limiting block is rotatably connected at the center of the side wall of the fixed plate near the nut. A spring is sleeved on the outer side of the first limiting block. The spring and the fixed plate rotate and abut against each other.
[0009] Furthermore, a groove 2 is provided on one side of the outer arc wall of the limiting block 1 along its circumference. The spring, the limiting block 1, and the fixing plate are all coaxially arranged. Both ends of the spring are fixed with elbows, and the length direction of the elbows is perpendicular to the spring axis. The limiting block 2 is fixedly connected to the edge of the side wall of the fixing plate near the nut. The length direction of the limiting block 2 is parallel to the axial direction of the bolt body. The limiting block 2 is located in the groove 2 and does not contact the limiting block 1.
[0010] Furthermore, the center of the side wall of the limiting block one and the fixing plate that are close to each other is provided with a channel three that runs through the axis. The bolt body is threaded into the two channels three respectively, and the inner arc wall of the channel two is provided with anti-slip texture.
[0011] Furthermore, the cross-section of the second limiting block along the radial direction of the fixed plate is a fan-shaped ring, and the side wall of the second limiting block near the axis of the first limiting block is an arc surface and is coaxially arranged with the outer arc wall of the first limiting block. The bent ends of the spring abut against the inner side walls of the two ends of the groove, and the bent ends of the spring abut against the outer side walls of the second limiting block along the circumference of the limiting block.
[0012] Furthermore, a locking block is fixedly connected to the side wall of the nut near the limiting block. The cross-section of the locking block along the horizontal plane of the limiting block is a fan-shaped ring. A sliding groove is provided on the side wall of the limiting block near the nut at the position corresponding to the locking block. The locking block slides in the sliding groove. The shape of the sliding groove on the side wall of the limiting block near the nut is adapted to the locking block. When the locking block is inserted into the sliding groove, there is still space in the sliding groove for the sliding block to slide.
[0013] Compared with the prior art, the beneficial effects of this utility model are:
[0014] 1. Through the cooperation between the anti-loosening pad body and the limiting plate, the channel on the fixing part of the anti-loosening pad body can firmly lock the nut, preventing it from rotating. At the same time, the extensions at both ends of the anti-loosening pad body can be inserted into the corresponding grooves on the side wall of the limiting plate, making the anti-loosening pad body and the limiting plate more firmly connected and further fixing the anti-loosening pad body.
[0015] 2. Through the use of limit block one, spring, fixed plate and limit block two, when vibration occurs, the limit plate and fixed plate absorb part of the vibration force to loosen and rotate first, which in turn pushes the spring. Since the spring pushes from the outside, it will generate friction with the inner arc wall of the limit plate, which will then prevent the fixed plate from rotating in the opposite direction. This effectively prevents the vibration from driving the nut to loosen. Therefore, while preventing the nut from loosening, it will not damage the bolt. Moreover, the structure is simple and easy to inspect and replace. Attached Figure Description
[0016] Figure 1 An explosion of an integral structure of an anti-seismic bolt with an anti-loosening pad structure. Figure 1 ;
[0017] Figure 2 An exploded view of the locking structure in a seismic-resistant bolt with an anti-loosening pad.
[0018] Figure 3 A schematic diagram of the overall structure of an anti-loosening bolt with an anti-loosening pad;
[0019] Figure 4 An explosion of an integral structure of an anti-seismic bolt with an anti-loosening pad structure. Figure 2 ;
[0020] Figure 5 This is a schematic diagram showing the connection between the bolt body and the locking mechanism in an anti-loosening bolt with an anti-loosening pad structure.
[0021] In the picture:
[0022] 10. Nut; 11. Bolt body; 12. Anti-loosening washer body; 13. Limiting plate;
[0023] 20. Limiting block one; 21. Spring; 22. Fixing plate; 23. Limiting block two. Detailed Implementation
[0024] 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.
[0025] Please see the appendix Figure 1 To be continued Figure 5 This utility model provides an anti-seismic bolt with an anti-loosening pad structure: it includes a nut 10, a bolt body 11, an anti-loosening pad body 12, and a limiting plate 13. The nut 10 and the limiting plate 13 are sequentially threaded to the outside of the bolt body 11 along the axial direction. The anti-loosening pad body 12 is sleeved on the outer wall of the nut 10. The anti-loosening pad body 12 includes a fixing part and an extension part. The fixing part of the anti-loosening pad body 12 is coaxially arranged with the nut 10, the bolt body 11, and the limiting plate 13. A channel is provided at the top center of the fixing part, which is axially extending through the bolt body 11. The channel is a regular polygon structure, and the corner of the outer wall of the nut 10 abuts against the corner of the inner wall of the channel. Both ends of the fixing part along the length direction are provided with extension parts. The end of the extension part away from the fixing part is bent toward the limiting plate 13. A groove is provided on the outer wall of the limiting plate 13 at the position corresponding to the bent part of the anti-loosening pad body 12. The end of the bent part away from the fixing part is inserted into the groove.
[0026] It should be noted that the cross section of the channel 1 along the axial direction of the bolt body 11 is a regular polygon. In one possible embodiment, the projection of the channel 1 along the axial direction of the bolt body 11 is a regular dodecagon, and the projection of the nut 10 along the axial direction of the bolt body 11 is a regular hexagon. Thus, the nut 10 can be locked in the channel 1. The anti-loosening pad body 12 plays a role in fixing the nut 10. At the same time, the connection between the anti-loosening pad body 12 and the limiting plate 13 makes it even more difficult for the nut 10 to rotate. That is, the anti-loosening pad body 12 and the limiting plate 13 absorb the impact and vibration force brought by the train passing by, thereby reducing the impact on the nut 10 and reducing the possibility of the nut 10 becoming loose.
[0027] The extensions at both ends of the anti-loosening pad body 12 can be bent by tapping or other means and then inserted into the groove on the side wall of the limiting plate 13, so that the anti-loosening pad body 12 and the limiting plate 13 form a stable whole, further ensuring the fastening effect of the anti-loosening pad body 12.
[0028] Please see the appendix Figure 1 To be continued Figure 5The present invention provides a technical solution: a second channel coaxial with the bolt body 11 is provided at the center of the side wall of the limiting plate 13 near the nut 10. The first channel and the second channel are coaxially arranged. A locking mechanism is provided in the second channel. The locking mechanism includes a fixing plate 22 rotatably connected to the end of the inner arc wall of the second channel away from the nut 10. A limiting block 20 is rotatably connected at the center of the side wall of the fixing plate 22 near the nut 10. A spring 21 is sleeved on the outside of the limiting block 20. The spring 21 and the fixing plate 22 rotate and abut against each other.
[0029] It should be noted that the locking mechanism is a backup measure. When the inner wall of channel 1 is damaged and the nut 10 cannot be locked, it serves as a backup measure to prevent the nut 10 from loosening. When the bolt body 11 is affected by vibration, it will drive the nut 10 to rotate and loosen. The locking mechanism will absorb the vibration and impact force first and rotate first, just like the anti-loosening pad body 12 and the limiting plate 13. Then, the locking mechanism will cancel out this rotational force.
[0030] Furthermore, the limiting plate 13 can be fixed to other components on the turnout.
[0031] Please see the appendix Figure 1 To be continued Figure 5 The present invention provides a technical solution: a second groove is provided on one side of the outer arc wall of the limiting block 20 along its circumference. The spring 21, the limiting block 20, and the fixing plate 22 are all coaxially arranged. Both ends of the spring 21 are fixed with elbows, and the length direction of the elbows is perpendicular to the axis of the spring 21. The edge of the side wall of the fixing plate 22 near the nut 10 is fixedly connected to the second limiting block 23. The length direction of the second limiting block 23 is parallel to the axis of the bolt body 11. The second limiting block 23 is located in the second groove and does not contact the first limiting block 20.
[0032] It should be noted that: the cross-sectional shape of the groove 2 along the radial plane of the bolt body 11 is a fan-shaped ring, that is, the groove 2 can be regarded as a groove dug along the outer arc wall of the limiting block 20, and the end of the limiting block 23 away from the fixing plate 22 extends into the groove 2.
[0033] Please see the appendix Figure 1 To be continued Figure 5 The present invention provides a technical solution: the center of the side wall of the limiting block 20 and the fixing plate 22 that are close to each other is provided with a channel 3 that runs through the axis. The bolt body 11 is threaded into the two channels 3 respectively. The inner arc wall of the channel 2 is provided with anti-slip texture.
[0034] It should be noted that: Channel 3 allows the limiting block 1 20 and the fixing plate 22 to be fitted onto the bolt body 11, and the anti-slip texture on the inner arc wall of Channel 2 is used to increase the friction between the inner arc wall of Channel 2 and the spring 21.
[0035] Please see the appendix Figure 1 To be continued Figure 5 The present invention provides a technical solution: the cross section of the second limiting block 23 along the radial direction of the fixing plate 22 is a fan-shaped ring, and the side wall of the second limiting block 23 near the axis of the first limiting block 20 is an arc surface and is coaxially arranged with the outer arc wall of the first limiting block 20. The bent ends of the spring 21 abut against the inner side walls of the two ends of the groove 2, and the bent ends of the spring 21 abut against the outer side walls of the second limiting block 23 along the circumferential direction of the first limiting block 20.
[0036] It should be noted that the bends at both ends of spring 21 extend inwards and the direction of extension of the bends is perpendicular to the axis of spring 21.
[0037] Since the two ends of the spring 21 are far apart and abut against the inner walls of the two ends of the groove 2, when the limiting block 20 rotates actively, the groove 2 on the limiting block 20 will abut against the bend and thus push the spring 21 to move. During this period, since the groove 2 abuts against the inner curved surface of the bend from the side of the bend closest to the spring 21, the spring 21 will be in a "contracted" state when it is subjected to the force of the inner curved surface, that is, the spring 21 has a tendency to contract inward. As a result, the radius of the spring 21 will be slightly reduced, reducing the contact area with the inner arc wall of the channel 2, reducing the friction force of the inner arc wall of the channel 2 on the spring 21 when it rotates with the limiting block 20, thus allowing the nut 10 to rotate normally.
[0038] The longitudinal section of the limiting block 23 is a fan-shaped ring. The cross-sectional size of the limiting block 23 is smaller than that of the groove 2, and the cross-sectional shapes of the two along the radial plane of the bolt body 11 are similar, thus providing space for the spring 21 to move. Since the sides of the bends at both ends of the spring 21 that are close to each other abut against the outer walls of the two ends of the limiting block 23, when the fixing plate 22 drives the limiting block 23 to rotate actively, the limiting block 23 will abut against the bend and thus push the spring 21 to move. During this period, since the limiting block 23 abuts against the outer curved surface of the bend away from the spring 21, the spring 21 will be in a "stretched" state when subjected to the force of the outer curved surface, that is, the spring 21 has a tendency to expand outward, and thus the radius of the spring 21 will increase slightly, increasing the contact area with the inner arc wall of the channel 2, increasing the friction force of the inner arc wall of the channel 2 on the spring 21 when it rotates with the limiting block 20, thus making it difficult or even impossible for the fixing plate 22 to rotate.
[0039] Please see the appendix Figure 1 To be continued Figure 5The present invention provides a technical solution: a locking block is fixedly connected to the side wall of the nut 10 near the limiting block 20. The cross-section of the locking block along the horizontal plane of the limiting block 20 is a fan-shaped ring. A sliding groove is provided on the side wall of the limiting block 20 near the nut 10 at the position corresponding to the locking block. The locking block slides in the sliding groove. The shape of the sliding groove on the side wall of the limiting block 20 near the nut 10 is adapted to the locking block. When the locking block is inserted into the sliding groove, there is still space in the sliding groove for the sliding block to slide.
[0040] It should be noted that: the first locking block and the first sliding groove facilitate the installation of the nut 10 and the first limiting block 20. At the same time, while tightening the nut 10, the first limiting block 20 and the fixing plate 22 can be tightened. The first sliding groove has reserved space to prevent the fixing plate 22 from becoming loose under force, which would directly affect the nut 10 and cause the locking mechanism to fail.
[0041] Working principle:
[0042] Nut 10 can be locked in channel 1. Anti-loosening pad body 12 plays a role in fixing nut 10. At the same time, the connection between anti-loosening pad body 12 and limiting plate 13 makes it even more difficult for nut 10 to rotate. That is, anti-loosening pad body 12 and limiting plate 13 absorb the impact and vibration of the train passing by, thereby reducing the impact on nut 10 and reducing the possibility of nut 10 loosening.
[0043] When the bolt body 11 is vibrated, the vibration force will be transmitted from the locking mechanism to the nut 10 along the axial direction of the bolt body 11. Therefore, the fixing plate 22 will be subjected to force first and loosen and then rotate, which will push the spring 21 to rub against the inner wall of the channel 2, and then prevent the rotation of the fixing plate 22 from causing the limit block 1 20 to rotate and thus affecting the nut 10.
[0044] Furthermore, the locking mechanism ensures that the spring 21 will not rub against the fixing plate 22 when the nut 10 is tightened or unscrewed during installation. In other words, the nut 10 will not be obstructed when it rotates actively, and the locking mechanism will not cause any obstruction during active installation or disassembly.
Claims
1. A seismic bolt with an anti-loosening washer structure, comprising a nut (10), a bolt body (11), an anti-loosening washer body (12), and a limiting plate (13), wherein the nut (10) and the limiting plate (13) are sequentially threaded onto the outside of the bolt body (11) along the axial direction of the bolt body (11), characterized in that: The anti-loose pad body (12) is sleeved on the outer side wall of the nut (10), the anti-loose pad body (12) comprises a fixed part and an extension part, the fixed part of the anti-loose pad body (12) is coaxially arranged with the nut (10), the bolt body (11) and the limiting plate (13), a channel one is formed in the center of the top of the fixed part and penetrates the bolt body (11) in the axial direction, the channel one is a regular polygon structure, and the corner of the outer side wall of the nut (10) abuts against the corner of the inner side wall of the channel one, the opposite ends of the fixed part along the length direction are each provided with an extension part, one end of the extension part away from the fixed part is arranged to be bent towards the limiting plate (13), and a groove one is formed in the position of the outer side wall of the limiting plate (13) corresponding to the bent part of the anti-loose pad body (12), and the end of the bent part away from the fixed part is arranged to be inserted into the groove one.
2. The anti-vibration bolt with the anti-loosening pad structure according to claim 1, characterized in that: The limiting plate (13) is provided with a channel two coaxial with the bolt body (11) at the center of one side wall close to the nut (10), the channel one and the channel two are coaxially arranged, and the channel two is provided with a locking mechanism, the locking mechanism comprises a fixed plate (22) rotatably connected to the arc wall of the channel two away from the nut (10), the fixed plate (22) is rotatably connected to a limiting block one (20) at the center of one side wall close to the nut (10), the outer side of the limiting block one (20) is sleeved with a spring (21), and the spring (21) and the fixed plate (22) are rotatably abutted against each other.
3. The anti-vibration bolt with the anti-loosening pad structure according to claim 2, characterized in that: The outer arc wall of the limiting block one (20) is provided with a groove two on one side along the circumferential direction, the spring (21), the limiting block one (20) and the fixed plate (22) are coaxially arranged, the two ends of the spring (21) are fixedly provided with bends, the length directions of the bends are perpendicularly arranged towards the axis of the spring (21), the edge of one side wall of the fixed plate (22) close to the nut (10) is fixedly connected with a limiting block two (23), the length direction of the limiting block two (23) is parallel to the axial direction of the bolt body (11), the limiting block two (23) is located in the groove two and does not contact the limiting block one (20).
4. The anti-vibration bolt with the anti-loosening pad structure according to claim 3, characterized in that: The center of one side wall close to each other of the limiting block one (20) and the fixed plate (22) is provided with a channel three penetrating in the axial direction, the bolt body (11) is respectively threadedly connected in the two channels three, and the arc wall in the channel two is provided with an anti-skid line.
5. The anti-vibration bolt with the anti-loosening pad structure according to claim 3, characterized in that: The cross section of the limiting block two (23) along the horizontal plane of the radial direction of the fixed plate (22) is a fan ring, one side wall close to the axis of the limiting block one (20) of the limiting block two (23) is an arc surface and coaxially arranged with the outer arc wall of the limiting block one (20), the bends of the two ends of the spring (21) are respectively abutted against the inner side walls of the two ends of the groove two, and the bends of the two ends of the spring (21) are respectively abutted against the outer side walls of the two ends of the limiting block two (23) along the circumferential direction of the limiting block one (20).
6. The anti-vibration bolt with the anti-loosening pad structure according to claim 5, characterized in that: The nut (10) is fixedly connected with a clamping block I on one side wall close to the limiting block I (20), the clamping block I is a fan ring along the cross section of the horizontal plane where the limiting block I (20) is located, the limiting block I (20) is provided with a sliding groove I on the side wall close to the nut (10) and corresponding to the position of the clamping block I, the clamping block I slides in the sliding groove I, and the shape of the sliding groove I on the side wall close to the nut (10) of the limiting block I (20) is matched with the clamping block I, when the clamping block I is inserted into the sliding groove I, there is still space in the sliding groove I for the sliding of the clamping block I.