Quasi-zero-stiffness vibration reduction fastener structure

Abstract

The utility model provides a quasi-zero stiffness vibration reduction fastener structure, which belongs to the technical field of rail transit and comprises a ballast bed, a damping component and a fastening component. A cavity is reserved in the ballast bed, and a supporting block is mounted in the cavity; the pneumatic spring is installed in the cavity in a hinged mode, the pneumatic spring can swing in the direction parallel to the track, the stress direction of the supporting block is increased, when the supporting block is stressed, the pneumatic spring is driven to be compressed so as to play a role in vibration isolation, the supporting block drives the connecting rod to move through the hinge seats on the periphery, and therefore vibration isolation is achieved. A sliding rod is installed in the middle of the supporting seat, damping springs sleeve the two ends of the sliding rod, a connecting rod drives a hinged sliding block to slide on the surface of the sliding rod, the sliding block slides to drive the damping springs to dissipate vibration through deformation, and therefore the multidirectional stress vibration reduction effect is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to rail transit technical field, concretely is a kind of quasi-zero stiffness damping fastener structure. BACKGROUND

[0002] With the rapid development of China's railway and urban rail transit, people's travel has been greatly facilitated. However, the vibration in the railway track often brings adverse consequences, such as wear and tear of mechanical parts, noise generation and reduction of passenger comfort. Therefore, vibration isolation has gradually become a key requirement of many engineering systems. At present, the most effective method to reduce the vibration and noise of the track system is to reduce the vibration from the vibration source. The traditional damping fastener is not satisfactory in low-frequency vibration isolation. The traditional passive isolation method needs to reduce the stiffness of the damping fastener to reduce the natural frequency of the system, thereby expanding the frequency range of vibration isolation. However, this may result in excessive static displacement. The quasi-zero stiffness damping fastener structure based on slider link with the application number "CN202410562813.3" is adopted. The positive and negative stiffness mechanism is composed of slider link negative stiffness damping member and vertical viscous damper. The positive and negative stiffness mechanism is connected in parallel to form a quasi-zero stiffness vibration isolation structure. It has good nonlinear stiffness and can provide flexible quasi-zero stiffness, zero stiffness and negative stiffness. It has low dynamic stiffness to reduce the natural frequency and expand the frequency range of vibration isolation to meet the low-frequency damping requirement. At the same time, it also has high static stiffness to reduce the static displacement, thereby achieving the effect of reducing the vibration and noise of the steel rail while reducing the displacement. However, the structure still needs to be improved in use. The slider link negative stiffness damping member is arranged on both sides of the support block, so that the support block can only move up and down under stress to achieve vibration isolation effect, which cannot meet the multi-directional stress damping requirement and reduces the damping effect. SUMMARY

[0003] The utility model aims at providing a quasi-zero stiffness damping fastener structure to solve the problem of the slider link negative stiffness damping member arranged on both sides of the support block, so that the support block can only move up and down under stress to achieve vibration isolation effect, which cannot meet the multi-directional stress damping requirement and reduces the damping effect.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a quasi-zero stiffness damping fastener structure, comprising: a track bed, a damping member and a fastening assembly.

[0005] The inside of the track bed is reserved with a cavity, the inside of the cavity is installed with a support block, and the surface of the track bed is installed with a track.

[0006] The damping member comprises a pneumatic spring hingedly mounted inside the cavity and swinging in the direction parallel to the track, the top end of the pneumatic spring is connected with the supporting block, supporting seats are mounted around the inner wall of the cavity, a sliding rod is mounted in the middle of the supporting seat, a sliding block is slidingly mounted on the surface of the sliding rod, a connecting rod is hingedly connected to the surface of the sliding block, damping springs are sleeved at both ends of the connecting rod, the sliding block is arranged between the two damping springs, hinged seats are mounted around the supporting block, and one end of the connecting rod is hingedly connected with the hinged seat.

[0007] The fastening assembly comprises a pad plate mounted on the surface of the supporting block, fixed clamps are arranged on both sides of the surface of the pad plate, mounting holes are formed in the surface of the pad plate and the fixed clamps, and fastening bolts are threadedly connected in the mounting holes.

[0008] As a preferred scheme of the utility model, limiting rods are fixedly installed on both sides of the supporting seat, and limiting blocks are fixedly installed on both sides of the sliding block and slidingly mounted on the surface of the limiting rods.

[0009] As a preferred scheme of the utility model, an installation groove is formed in the top of the supporting block, assembly holes are formed in the pad plate and the installation groove, and assembly bolts are inserted into the assembly holes.

[0010] As a preferred scheme of the utility model, a plurality of lightening holes are formed in the surface of the connecting rod.

[0011] As a preferred scheme of the utility model, a reinforcing plate is mounted on the inner side of the connecting rod.

[0012] As a preferred scheme of the utility model, a mounting screw is mounted on one side of the supporting seat.

[0013] Compared with the prior art, the utility model has the advantages that:

[0014] (1) The pneumatic spring is hingedly mounted in the cavity and can swing in the direction parallel to the track, so that the force bearing direction of the supporting block is increased, when the supporting block is stressed, the pneumatic spring is compressed, vibration isolation is achieved, the supporting block is moved by the connecting rod through the surrounding hinged seats, the sliding rod is mounted in the middle of the supporting seat, the damping springs are sleeved at both ends of the sliding rod, the sliding block is slidingly mounted on the surface of the sliding rod, and the damping springs are deformed to dissipate vibration, so that multi-directional force damping effect is achieved.

[0015] (2) The fastening assembly is arranged, the pad plate is mounted on the top of the supporting block, the fixed clamps are arranged on both sides of the pad plate, the fixed clamps are in contact with both sides of the track, the fastening bolts are inserted into the mounting holes in the surface of the pad plate and the fixed clamps, the fixed clamps are fixed, and the track is mounted and fastened through the fixed clamps. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the whole structure schematic view of the utility model;

[0017] Figure 2 It is the damping member structure schematic view of the utility model;

[0018] Figure 3 It is the fastening assembly structure schematic view of the utility model;

[0019] Figure 4 It is the connecting rod structure schematic view of the utility model.

[0020] In the drawing: 1, ballast bed;2, cavity;3, support block;4, track;5, damping member;51, pneumatic spring;52, support seat;53, sliding rod;54, sliding block;55, connecting rod;56, damping spring;57, hinged seat;6, fastening assembly;61, pad;62, fixed clamp;63, mounting hole;64, fastening bolt;7, limiting rod;8, limiting block;9, mounting groove;10, assembly hole;11, assembly bolt;12, lightening hole;13, reinforcing plate;14, mounting screw. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantage of the utility model embodiment clearer, the technical scheme in the utility model embodiment will be described clearly and completely below in conjunction with the drawings in the utility model embodiment. Obviously, the described embodiment is a part of the embodiment of the utility model, rather than all the embodiments. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without creative labor fall within the protection scope of the utility model.

[0022] Please refer to Figures 1-4 A kind of quasi-zero stiffness damping fastener structure, comprising: ballast bed 1, damping member 5 and fastening assembly 6;The inside of ballast bed 1 is reserved with cavity 2, support block 3 is installed in the inside of cavity 2, the surface of ballast bed 1 is installed with track 4;

[0023] Please refer to Figure 1 , Figure 2 Damping member 5 includes pneumatic spring 51 hingedly installed in the inside of cavity 2 and swings in parallel direction with track 4, the top end of pneumatic spring 51 is connected with support block 3, support seat 52 is installed around the inner wall of cavity 2, sliding rod 53 is installed in the middle part of support seat 52, sliding block 54 is slidably installed on the surface of sliding rod 53, connecting rod 55 is hinged on the surface of sliding block 54, damping spring 56 is sleeved on both ends of connecting rod 55, sliding block 54 is arranged between both ends damping spring 56, hinged seat 57 is installed around support block 3, one end of connecting rod 55 is hingedly connected with hinged seat 57.

[0024] Specific use: in the cavity 2 inside the hinged installation of pneumatic spring 51, pneumatic spring 51 can be in parallel with the track 4 direction swing, so as to increase the bearing block 3 bearing orientation, when the bearing block 3 bearing driven pneumatic spring 51 compression, for play to isolation, bearing block 3 itself through the four around the hinge seat 57 driven connecting rod 55, support seat 52 middle installation of slide rod 53, both ends of the slide rod 53 set with damping spring 56, connecting rod 55 driven articulated slider 54 on the surface of the slide rod 53 sliding, slider 54 sliding driven damping spring 56 through the change to dissipate vibration, thereby playing the effect of multi bearing vibration reduction.

[0025] Please refer to Figure 1 , Figure 3 , fastening assembly 6 includes the surface of the bearing block 3 pad plate 61, both sides of the surface of the pad plate 61 are provided with fixed card 62, pad plate 61 and fixed card 62 surface are provided with mounting hole 63, mounting hole 63 inside screw thread connection has fastening bolt 64.

[0026] Specific use: the top of the bearing block 3 is provided with pad plate 61, and the both sides of the pad plate 61 are provided with fixed card 62. The fixed card 62 is in contact with the both sides of the track 4. The fastening bolt 64 is inserted into the mounting hole 63 on the surface of the pad plate 61 and the fixed card 62, so that the fixed card 62 is fixed, and the track 4 is installed and fastened through the fixed card 62.

[0027] Please refer to Figure 1 , Figure 2 , the both sides of the support seat 52 are fixedly provided with limiting rod 7, and the both sides of the slider 54 are fixedly provided with limiting block 8. The limiting block 8 is slidingly installed on the surface of the limiting rod 7.

[0028] Specific use: the both sides of the support seat 52 are provided with limiting rod 7, and the both sides of the slider 54 are provided with limiting block 8. When the connecting rod 55 drives the slider 54 to slide, the limiting block 8 on the both sides of the slider 54 slides along the limiting rod 7, so that the sliding of the slider 54 is stable.

[0029] Please refer to Figure 3 , the top of the bearing block 3 is provided with mounting groove 9, and the pad plate 61 and the mounting groove 9 are provided with assembly hole 10. The assembly hole 10 is inserted with assembly bolt 11.

[0030] Specific use: the top of the bearing block 3 is provided with mounting groove 9, and the pad plate 61 and the mounting groove 9 are provided with assembly hole 10. After the pad plate 61 is placed in the mounting groove 9, the assembly bolt 11 is screw connected in the assembly hole 10, so that the pad plate 61 is fixedly installed in the mounting groove 9.

[0031] Please refer to Figure 4The surface of the connecting rod 55 is provided with a plurality of lightening holes 12, and the inner side of the connecting rod 55 is provided with a reinforcing plate 13.

[0032] In use, the lightening holes 12 on the surface of the connecting rod 55 ensure the structural strength while reducing the structural weight, and the reinforcing plate 13 on the inner side of the connecting rod 55 improves the structural strength.

[0033] Please refer to Figure 2 One side of the support base 52 is provided with a mounting screw 14.

[0034] In use, the support base 52 is fixed to the inner wall of the cavity 2 through the mounting screw 14 on one side, and provides mounting support for the slide rod 53 and the limiting rod 7 through the support base 52.

[0035] The pneumatic spring 51 is hingedly installed in the cavity 2, and can swing in the direction parallel to the track 4, so as to increase the stress direction of the support block 3. When the support block 3 is stressed, the pneumatic spring 51 is compressed, which is used for vibration isolation. The support block 3 itself drives the connecting rod 55 to move through the surrounding hinged seat 57. The middle part of the support base 52 is provided with the slide rod 53, the two ends of the slide rod 53 are provided with the damping spring 56, the hinged slide block 54 is driven by the connecting rod 55 to slide on the surface of the slide rod 53, and the slide block 54 drives the damping spring 56 to dissipate vibration through deformation, so as to achieve the effect of multi-directional stress vibration reduction.

[0036] The contents not described in detail in the description belong to the prior art known by the person skilled in the art. Although the utility model has been described in detail with reference to the foregoing embodiments, the person skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A quasi-zero stiffness vibration damping fastener structure, characterized by, Include: The track bed (1), the inside of the track bed (1) is reserved for the cavity (2), the inside of the cavity (2) is installed with the support block (3), the surface of the track bed (1) is installed with the track (4); The damping member (5) includes a pneumatic spring (51) hingedly installed inside the cavity (2) and oscillating in parallel with the track (4), the top end of the pneumatic spring (51) is connected with the support block (3), the inner wall of the cavity (2) is installed with a support seat (52) around, the middle part of the support seat (52) is installed with a sliding rod (53), the surface of the sliding rod (53) is slidingly installed with a sliding block (54), the surface of the sliding block (54) is hingedly connected with a connecting rod (55), both ends of the connecting rod (55) are sleeved with a damping spring (56), the sliding block (54) is arranged between the two damping springs (56), the support block (3) is installed with a hinged seat (57) around, one end of the connecting rod (55) is hingedly connected with the hinged seat (57); The fastening assembly (6) includes a base plate (61) installed on the surface of the support block (3), the surface of the base plate (61) is provided with a fixed clamp (62) on both sides, the surface of the base plate (61) and the fixed clamp (62) is provided with a mounting hole (63), the inside of the mounting hole (63) is threadedly connected with a fastening bolt (64).

2. A quasi-zero stiffness vibration reduction fastener structure according to claim 1, wherein: The support seat (52) is fixedly installed with a limiting rod (7) on both sides, the sliding block (54) is fixedly installed with a limiting block (8) on both sides, the limiting block (8) is slidingly installed on the surface of the limiting rod (7).

3. A quasi-zero stiffness vibration-reducing fastener structure according to claim 1, wherein: The top of the support block (3) is provided with a mounting groove (9), the inside of the base plate (61) and the mounting groove (9) is provided with an assembly hole (10), the inside of the assembly hole (10) is inserted with an assembly bolt (11).

4. A quasi-zero stiffness vibration reduction fastener structure according to claim 1, wherein: The surface of the connecting rod (55) is provided with a plurality of lightening holes (12).

5. A quasi-zero stiffness vibration-reducing fastener structure according to claim 1, wherein: The inside of the connecting rod (55) is installed with a reinforcing plate (13).

6. A quasi-zero stiffness vibration reduction fastener structure according to claim 1, wherein: One side of the support seat (52) is installed with a mounting screw (14).

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