Subway vibration reduction ballast bed
By using components such as connecting buckles, limiting bolts, and buffer pads in the subway vibration-damping track bed to form a composite structure, the displacement problem caused by vibration fatigue and environmental factors in the track bed is solved, thereby improving the stability and vibration resistance of the track bed.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-29
- Publication Date
- 2026-03-31
AI Technical Summary
After prolonged use, traditional subway vibration-damping track beds suffer from material fatigue, leading to displacement and affecting stability. Furthermore, environmental factors such as geological conditions and temperature changes further exacerbate the instability of the track bed.
The connection strength of the track bed is enhanced by components such as the first connecting buckle, limiting bolt, connecting bracket and fastening bolt, and combined with buffer pad, buffer block and shock absorber to form a composite structure to actively suppress displacement and enhance stability.
By strengthening the connection and buffering measures, displacement of the track bed material caused by vibration fatigue was avoided, thereby improving the stability and vibration resistance of the track bed.
Smart Images
Figure CN224063196U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of track bed technology, and in particular to a subway vibration-damping track bed. Background Technology
[0002] With the acceleration of urbanization, subways, as an important part of urban transportation, are increasingly impacting the surrounding environment and residents' lives with the vibrations and noise they generate. Traditional vibration reduction technologies have limited effectiveness in reducing vibration and noise; therefore, finding more effective vibration-damping track bed technologies has become one of the key aspects of subway construction.
[0003] In existing technologies, subway vibration-damping track beds, subjected to prolonged vibrations from subway trains during actual use, do indeed experience a certain degree of displacement. This displacement is primarily caused by a combination of factors. On one hand, the continuous operation of subway trains generates enormous dynamic loads. Although vibration-damping track beds, such as steel spring floating slab track beds and rubber floating slab track beds, are designed with vibration-damping elements to absorb and disperse these loads, prolonged exposure can still cause fatigue in the track bed materials, leading to minor displacements. On the other hand, environmental factors such as geological conditions and temperature changes also affect the stability of the track bed. For example, in areas with complex geological structures or uneven soil distribution, subway track beds may be affected by uneven settlement, leading to displacement. Temperature changes cause thermal expansion and contraction of the track bed materials, thus affecting their positional stability. Therefore, it is necessary to develop an improved subway vibration-damping track bed to address these issues. Utility Model Content
[0004] In order to overcome the problem that while the vibration damping track bed buffers vibration through the detection mechanism, it will cause fatigue of the track bed material and affect its stability after track bed displacement.
[0005] The technical solution of this utility model is as follows: a subway vibration-damping track bed, including a lower track bed body, and a first connecting buckle and a snap-fit mechanism. An upper track bed body is provided on the top of the lower track bed body, and a sleeper body is provided on the top of the upper track bed body. A snap-fit mechanism is provided on the outside of the lower track bed body, and a sleeper body is fixedly connected to the outside of the sleeper body. A first limiting bolt is threadedly connected inside the lower track bed body, and a buffer sleeve is fixedly connected to the outside of the first limiting bolt. A connecting bracket is provided on the outside of the lower track bed body, and a first fastening bolt is threadedly connected inside the lower track bed body. A second fastening bolt is provided inside the upper track bed body. The lower track bed body and the upper track bed body are restricted and fixed by the first limiting bolt, the first fastening bolt, and the first fastening bolt.
[0006] Preferably, the upper track bed body has a through hole inside, and the first limiting bolt passes through the through hole and is threadedly connected to the lower track bed body.
[0007] Preferably, a buffer pad is provided between the upper track bed body and the lower track bed body. A fixed bracket is provided on the outside of the lower track bed body. A protective shell is fixedly connected to the inside of the fixed bracket. A slide rod is slidably connected inside the fixed bracket. A buffer block body is fixedly connected to the inside of the slide rod. The buffer block body is snapped into the inside of the upper track bed body. A shock absorber body is fixedly connected between the buffer block body and the fixed bracket. A shock-absorbing spring is fixedly connected between the buffer block body and the fixed bracket.
[0008] Preferably, the fixed bracket has a groove at the relative position of the slide rod, and the slide rod is slidably connected inside the groove.
[0009] Preferably, the upper track bed body has a slot at the relative position of the buffer block body, and the buffer block body is snapped into the inside of the slot.
[0010] Preferably, the snap-fit mechanism includes a second fixing buckle, which is fixedly connected to the top of the protective shell. A flip cover is rotatably connected inside the second fixing buckle. A fixing block is fixedly connected to the top of the protective shell. A sliding block is slidably connected inside the fixing block. The sliding block is snap-fitted inside the flip cover. A first spring is fixedly connected between the sliding block and the fixing block.
[0011] Preferably, the flip cover has a slot at the relative position of the sliding block, and the sliding block is engaged and connected inside the slot.
[0012] The beneficial effects of this utility model are as follows: by adding a first connecting buckle, a first limiting bolt, a connecting bracket, a first fastening bolt and a second fastening bolt, the connection and constraint force between the lower track bed body and the upper track bed body are strengthened, and the track bed is transformed from a "loose body" that passively bears vibration into a "composite structure" that actively suppresses displacement. This avoids the problem that the track bed material will feel fatigued and its stability will be affected after the track bed is displaced while the vibration damping mechanism buffers the vibration. Attached Figure Description
[0013] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0014] Figure 2 This is a schematic diagram of the first limiting bolt and its connected components of this utility model;
[0015] Figure 3 This is a schematic diagram of the connecting bracket and its connected components of the present invention;
[0016] Figure 4 This is a schematic diagram of the fixed bracket and its connected components of this utility model;
[0017] Figure 5 This is a schematic diagram of the buckle mechanism of this utility model;
[0018] Figure 6 This is a cross-sectional view of the buckle mechanism of this utility model.
[0019] Explanation of reference numerals in the attached drawings: 1. Lower track bed body; 4. Upper track bed body; 5. Sleeper body; 21. First connecting buckle; 22. First limiting bolt; 23. Buffer sleeve; 24. Connecting bracket; 25. First fastening bolt; 26. Second fastening bolt; 27. Buffer pad partition; 28. Fixed bracket; 29. Protective shell; 210. Slide rod; 211. Buffer block body; 212. Shock absorber body; 213. Shock absorber spring; 31. Second fixing buckle; 32. Flip cover plate; 33. Fixed block; 34. Sliding block; 35. First spring. Detailed Implementation
[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0021] Please see Figure 1 - Figure 6This utility model provides an embodiment: a subway vibration-damping track bed, including a lower track bed body 1, and also including a first connecting buckle 21 and a buckling mechanism. An upper track bed body 4 is disposed on the top of the lower track bed body 1, and a sleeper body 5 is disposed on the top of the upper track bed body 4. A buckling mechanism is disposed on the outside of the lower track bed body 1, and a sleeper body 5 is fixedly connected to the outside of the sleeper body 5. A first limiting bolt 22 is threadedly connected inside the lower track bed body 1, and a buffer sleeve 23 is fixedly connected to the outside of the first limiting bolt 22. A connecting bracket 24 is disposed on the outside of the lower track bed body 1, and a first fastening bolt 25 is threadedly connected inside the lower track bed body 1. A second fastening bolt 26 is disposed inside the upper track bed body 4. The lower track bed body 1 and the upper track bed body 4 are restricted and fixed by the first limiting bolt 22, the first fastening bolt 25, and the first fastening bolt 26. The buffer sleeve 23 is specifically made of high-damping nitrile rubber. When fixing the position between the lower track bed body 1 and the upper track bed body 4, by... The first limiting bolt 22 passes through the first connecting buckle 21 and is threadedly connected to the upper track bed body 4 and the lower track bed body 1, fixing and limiting the position between the lower track bed body 1 and the upper track bed body 4. The buffer sleeve 23 set outside the first limiting bolt 22 buffers the vibration force, so as to protect the first limiting bolt 22 and fix it more firmly. Then, the second fastening bolt 26 and the first fastening bolt 25 pass through the connecting bracket 24 and are fixed to the upper track bed body 4 and the lower track bed body 1 respectively. When vibration occurs, the longitudinal resistance strength is improved by the interlocking force between the densely arranged bolts and the track bed concrete, which enhances the stability between the lower track bed body 1 and the upper track bed body 4. The upper track bed body 4 has a through hole. The first limiting bolt 22 passes through the through hole and is threadedly connected to the lower track bed body 1. The position of the first limiting bolt 22 is limited by the through hole and the buffer sleeve 23 is accommodated. The buffer sleeve 23 is used to protect the connection between the first limiting bolt 22 and the lower track bed body 1.
[0022] Please see Figure 1 - Figure 4In this embodiment, a buffer pad 27 is provided between the upper track bed body 4 and the lower track bed body 1. A fixed bracket 28 is provided on the outside of the lower track bed body 1. A protective shell 29 is fixedly connected to the inner side of the fixed bracket 28. A slide rod 210 is slidably connected inside the fixed bracket 28. A buffer block body 211 is fixedly connected to the inner side of the slide rod 210. The buffer block body 211 is snapped into the inside of the upper track bed body 4. A shock absorber body 212 is fixedly connected between the buffer block body 211 and the fixed bracket 28. A shock-absorbing spring 213 is fixedly connected between the buffer block body 211 and the fixed bracket 28. The buffer pad 27 is specifically made of high-density polyurethane elastomer, and the buffer block body 211 is specifically made of EPDM composite material. The buffer block body 211, the shock absorber body 212, and the shock absorber spring 213 work together to buffer the lateral vibration force of the track bed. They utilize elastic energy storage and release mechanisms to buffer low-frequency, large-amplitude vibrations and help limit structural displacement. The fixed bracket 28 has a groove at the relative position of the slide rod 210. The slide rod 210 is slidably connected inside the groove. The groove restricts the sliding of the slide rod 210, allowing it to slide linearly inside the fixed bracket 28 and preventing it from tilting and affecting the position of the buffer block body 211. The upper track bed body 4 has a slot at the relative position of the buffer block body 211. The buffer block body 211 is snapped into the slot. The slot accommodates the buffer block body 211, improving structural stability and better buffering vibration energy.
[0023] Please see Figure 1 , Figure 5 - Figure 6 In this embodiment, the locking mechanism includes a second fixing buckle 31, which is fixedly connected to the top of the protective shell 29. A flip cover plate 32 is rotatably connected inside the second fixing buckle 31. A fixing block 33 is fixedly connected to the top of the protective shell 29. A sliding block 34 is slidably connected inside the fixing block 33. The sliding block 34 is locked inside the flip cover plate 32. A first spring 35 is fixedly connected between the sliding block 34 and the fixing block 33. The first spring 35 provides a pushing force to the sliding block 34, pushing the sliding block 34 to lock the flip cover plate 32 more securely, thereby limiting the position of the flip cover plate 32 and preventing it from opening accidentally. The flip cover plate 32 has a slot at the relative position of the sliding block 34. The sliding block 34 is locked inside the slot. The slot and the sliding block 34 cooperate to limit the opening of the flip cover plate 32, so as to protect the internal buffer components from external factors such as dust and falling rocks, and better buffer and dampen the track bed.
[0024] During operation, after fixing the position of the lower track bed body 1, the buffer pad layer 27 is laid on the upper section of the lower track bed body 1. Then, the first limiting bolt 22 and the buffer sleeve 23 are passed through the sleeper body 5 and the upper track bed body 4, so that the first limiting bolt 22 and the lower track bed body 1 are threadedly connected. After the initial assembly of the lower track bed body 1 and the upper track bed body 4 is completed, the second fastening bolt 26 and the first fastening bolt 25 are passed through the connecting bracket 24 and threadedly connected to the upper track bed body 4 and the lower track bed body 1, respectively. This restricts the lateral movement of the lower track bed body 1 and the upper track bed body 4. When subsequent vibration occurs, the overall structure of the track bed is completed by tightening the first limiting bolt 22, the first fastening bolt 25 and the second fastening bolt 26. After ensuring strength, the fixed bracket 28 and the protective shell 29 are installed and fixed, so that the buffer block body 211 and the internal slot of the upper track bed body 4 are engaged to complete the installation. During subsequent subway operation, the buffer pad 27 and the buffer block body 211 buffer the generated vibration, and the shock absorber body 212 and the shock absorber spring 213 further buffer the generated vibration. When routine maintenance is required, the sliding block 34 is moved to disengage from the flip cover 32, and the flip cover 32 is opened to inspect and maintain the internal buffer components. After inspection, the flip cover 32 is closed, and the first spring 35 pushes the sliding block 34 to slide, so that it re-engages with the flip cover 32, thus completing the restriction of the flip cover 32.
[0025] By taking the above steps and adding the first connecting buckle 21, the first limiting bolt 22, the connecting bracket 24, the first fastening bolt 25 and the second fastening bolt 26, the problem of track bed material fatigue and track bed displacement affecting its stability can be solved by adding the first connecting buckle 21, the first limiting bolt 22, the connecting bracket 24, the first fastening bolt 25 and the second fastening bolt 26.
Claims
1. A subway vibration-damping track bed comprising a lower track bed body (1), characterized in that: The first connecting buckle (21) and the buckle mechanism are further included, the top of the lower track bed body (1) is provided with the upper track bed body (4), the top of the upper track bed body (4) is provided with the sleeper body (5), the outside of the lower track bed body (1) is provided with the buckle mechanism, the outside of the sleeper body (5) is fixedly connected with the sleeper body (5), the inside of the lower track bed body (1) is threadedly connected with the first limiting bolt (22), the outside of the first limiting bolt (22) is fixedly connected with the buffer sleeve (23), the outside of the lower track bed body (1) is provided with the connecting support (24), the inside of the lower track bed body (1) is threadedly connected with the first fastening bolt (25), the inside of the upper track bed body (4) is provided with the second fastening bolt (26), and the lower track bed body (1) and the upper track bed body (4) are limited and fixed through the first limiting bolt (22), the first fastening bolt (25) and the first fastening bolt (25).
2. The subway vibration damping track bed according to claim 1, characterized in that: The inside of the upper track bed body (4) is provided with a through hole, and the first limiting bolt (22) is threadedly connected with the lower track bed body (1) through the through hole.
3. The subway vibration damping track bed according to claim 1, characterized in that: The buffer pad interlayer (27) is arranged between the upper track bed body (4) and the lower track bed body (1), the outside of the lower track bed body (1) is provided with the fixed support (28), the inner side of the fixed support (28) is fixedly connected with the protection shell (29), the inside of the fixed support (28) is slidably connected with the sliding rod (210), the inner side of the sliding rod (210) is fixedly connected with the buffer block body (211), the buffer block body (211) is connected in the inside of the upper track bed body (4), the buffer block body (211) and the fixed support (28) are fixedly connected with the shock absorber body (212), and the buffer block body (211) and the fixed support (28) are fixedly connected with the shock absorbing spring (213).
4. The subway vibration damping track bed according to claim 3, characterized in that: The fixed support (28) is provided with a sliding groove in the opposite position of the sliding rod (210), and the sliding rod (210) is slidably connected in the inside of the sliding groove.
5. The subway vibration damping track bed according to claim 3, characterized in that: The upper track bed body (4) is provided with a clamping groove in the opposite position of the buffer block body (211), and the buffer block body (211) is clamped and connected in the inside of the clamping groove.
6. The subway vibration damping track bed according to claim 1, characterized in that: The second fixed buckle (31) is fixedly connected to the top of the protection shell (29), the inside of the second fixed buckle (31) is rotatably connected with the flip plate (32), the top of the protection shell (29) is fixedly connected with the fixed block (33), the inside of the fixed block (33) is slidably connected with the sliding block (34), the sliding block (34) is clamped and connected in the inside of the flip plate (32), and the sliding block (34) and the fixed block (33) are fixedly connected with the first spring (35).
7. The subway vibration damping track bed according to claim 6, characterized in that: The flip plate (32) is provided with a clamping groove in the opposite position of the sliding block (34), and the sliding block (34) is clamped and connected in the inside of the clamping groove.