Improved damping photonic crystal vibration isolator

Abstract

The utility model discloses an improved damping phononic crystal vibration isolator, which comprises a fixed shaft and a vibration damping component sleeved at the outer end of the fixed shaft, the vibration damping component comprises an oscillator ring unit, a first vibration damping piece, an inner connecting piece and an outer connecting piece, the inner connecting piece is arranged at the upper inner end of the outer connecting piece, the first vibration damping piece is arranged between the oscillator ring unit and the outer connecting piece, and the first vibration damping piece is arranged at the lower inner end of the outer connecting piece. The upper end face of the inner connecting piece is provided with an annular installation groove which is concave downwards, an inner thread is arranged in the annular installation groove, the lower end of the outer connecting piece is provided with a connecting protruding ring matched with the annular installation groove of the inner connecting piece, and the connecting protruding ring is further provided with an outer thread matched with the inner thread of the connecting protruding ring. The vibration damping assembly is simple in structure, the inner connecting piece and the outer connecting piece of the vibration damping assembly are fixed together in a threaded connection mode, assembly and follow-up disassembly and maintenance are more convenient and faster, the shape of the first vibration damping piece is arranged in the inner connecting piece and the outer connecting piece to be more matched, rigid connection is formed between the inner connecting piece and the outer connecting piece, and the vibration damping effect is better. And the transverse stability is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of track vibration reduction and noise reduction, in particular to an improved damping phononic crystal vibration isolator. Background Art

[0002] Rail transit often has excessive environmental vibration problems, which can be divided into control at the vibration source, control of the transmission path, and control of the vibrated body according to the different control objects. Control measures at the vibration source usually include vibration-damping fasteners, elastic sleepers, and floating plate tracks; control in the transmission path usually includes vibration isolation trenches and vibration isolation piles; control of the vibrated body usually includes vibration isolation supports, etc. Controlling vibration at the vibration source directly weakens the generation and propagation of vibration energy, and is also the most convenient in practical applications. At present, the most widely used control measures for the vibration source are soft elastic track structural components based on the vibration isolation mechanism of the mass-spring system, such as floating plate tracks, vibration-damping fasteners, elastic sleepers, rubber vibration isolation pads, etc. Among them, the floating plate track has outstanding low-frequency vibration reduction effect, relatively less rail corrugation, and long service life.

[0003] Prior to this, the applicant developed and applied for an invention patent, entitled: A tuned liquid particle damping phononic crystal isolator, with application number: 202310615250.5. The patent complements the technical characteristics of particle damping and tuned liquid damping to solve the problem of low-frequency vibration and effectively suppress low-frequency vibration; however, the applicant discovered in subsequent research that the isolator has poor sealing effect, insufficient lateral strength, and poor lateral stability. It is also very cumbersome to assemble and disassemble and maintain later, and is not easy to disassemble and separate, which requires replacement of the entire device, resulting in increased costs.

[0004] Therefore, it is necessary to study a new technical solution to solve the above problems. Utility Model Content

[0005] In view of this, the present invention aims to solve the deficiencies in the prior art, and its main purpose is to provide an improved damping phononic crystal isolator.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] An improved damping phononic crystal isolator comprises a fixed shaft and a vibration damping component sleeved on its outer end, the vibration damping component comprises an oscillator ring unit, a first vibration damping member, an inner connecting member and an outer connecting member, the inner connecting member is arranged at the upper inner end of the outer connecting member, the first vibration damping member is arranged between the oscillator ring unit and the outer connecting member, the upper end surface of the inner connecting member is provided with a downwardly recessed annular mounting groove, the annular mounting groove is provided with an internal thread, the lower end of the outer connecting member is provided with a connecting convex ring matched with the annular mounting groove of the inner connecting member, the connecting convex ring is also provided with an external thread matched with its internal thread, the inner connecting member is connected and fixed to the upper layer of the external connecting member through a threaded relationship.

[0008] Preferably, a second vibration damper is provided between the inner connecting member and the outer connecting member, and an inner end surface of the second vibration damper is in contact with an outer end surface of the inner connecting member, and an outer end surface of the second vibration damper is in contact with an inner end surface of the outer connecting member.

[0009] As a preference, the first vibration damping member and the second vibration damping member are manufactured by using an integrated molding technology of polymer elastomer materials.

[0010] Preferably, the vibrator ring unit comprises an upper shell and a lower shell, an upper end of the lower shell and a lower end of the upper shell are both provided with openings, and the upper shell covers the lower shell to form a receiving cavity.

[0011] Preferably, the lower end of the lower shell is provided with a thread, and the upper shell is provided with a thread matching the thread of the lower shell, and the upper shell and the lower shell are connected and fixed together through a threaded relationship, so that the accommodating cavity forms a closed space.

[0012] As a preference, damping particles and buffer damping liquid are arranged in the accommodating cavity, the buffer damping liquid is filled in the accommodating cavity, and the damping particles are placed in the buffer damping liquid to achieve a vibration reduction effect.

[0013] Preferably, the upper shell and the lower shell are both provided with a fixing boss extending toward the first vibration damper, the outer surface of the first vibration damper is provided with an inwardly recessed positioning groove, and the fixing boss is clamped in the positioning groove of the first vibration damper to form a connected and fixed state.

[0014] Preferably, a first sealing ring is provided between the fixed bosses extending from the upper shell and the lower shell, the upper end surface of the first sealing ring is affixed to the lower end surface of the fixed boss of the upper shell, and the lower end surface of the first sealing ring is affixed to the upper end surface of the fixed boss of the lower shell, so that the two form a sealed state.

[0015] Preferably, a second sealing ring is provided between the inner upper end surface of the upper shell and the inner upper end of the lower shell, the upper end surface of the second sealing ring is attached to the inner upper end surface of the upper shell, and the lower end surface of the second sealing ring is attached to the opening of the lower shell, thereby forming a sealed state between the upper shell and the lower shell.

[0016] Compared with the prior art, the utility model has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical solution that:

[0017] The utility model has a simple structure. By fixing the inner connecting member and the outer connecting member of the vibration damping assembly together by means of threaded connection, assembly and subsequent disassembly and maintenance are more convenient and quicker. The shape of the first vibration damping member is set to be more suitable for the inner connecting member and the outer connecting member, so that a rigid connection is formed between them. The lateral stability and the compression deformation effect of the elastic member can be improved by fixing the shaft, thereby ensuring the lateral stability of the phononic crystal isolator. Multiple sealing structures are set between the upper shell and the lower shell to ensure good sealing performance. They are also fixed together by means of threaded connection, which makes disassembly and assembly more convenient and shortens the time for assembly and maintenance, so that the vibration isolator has better vibration damping effect and economic cost performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0020] Figure 2 It is a schematic diagram of the single-layer structure of the utility model.

[0021] Figure 3 It is a schematic diagram of the single-layer structure of the utility model.

[0022] Figure 4 It is a schematic diagram of partial structural decomposition of the vibration damping component of the utility model.

[0023] Figure 5 It is an exploded schematic diagram of another viewing angle of the utility model.

[0024] Figure 6 It is a schematic diagram of the exploded structure of the vibrator ring unit of the utility model.

[0025] Figure 7 It is a schematic diagram of the structure of the vibrator ring unit from another perspective of the utility model.

[0026] Figure 8 It is a schematic diagram of the overall structure of the utility model.

[0027] Fig. 9 This utility model Figure 7 A schematic diagram of the enlarged local structure in the middle.

[0028] Among them, the reference numerals in the figure are:

[0029] 100, fixed shaft; 200, vibration damping assembly; 210, oscillator ring unit; 211, upper shell; 212, lower shell; 213, opening; 214, fixed boss; 215, first sealing ring; 216, second sealing ring; 217, accommodating chamber; 220, first vibration damping member; 230, inner connecting member; 231, annular mounting groove; 240, outer connecting member; 241, connecting convex ring; 250, second vibration damping member; 300, damping particles; 400, buffer damping liquid. DETAILED DESCRIPTION

[0030] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0031] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0032] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0034] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0035] Reference Figure 1-9 As shown: An improved damping phononic crystal isolator comprises a fixed shaft 100 and a vibration-damping assembly 200 sleeved on the outer end thereof, wherein the vibration-damping assembly 200 comprises a vibrator ring unit 210, a first vibration-damping member 220, an inner connecting member 230 and an outer connecting member 240, wherein the inner connecting member 230 is arranged at the upper inner end of the outer connecting member 240, and the first vibration-damping member 220 is arranged between the vibrator ring unit 210 and the outer connecting member 240, and further, a downwardly concave portion is provided on the upper end surface of the inner connecting member 230 The annular mounting groove 231 is recessed, and an internal thread is provided in the annular mounting groove 231, and then a connecting convex ring 241 is provided at the lower end of the external connecting piece 240 to match the annular mounting groove 231 of the internal connecting piece 230, and an external thread is also provided on the connecting convex ring 241 to match its internal thread, so that when the vibration damping assembly 200 is installed on the fixed shaft 100, the internal connecting piece 230 of the current layer is fixed together with the external connecting piece 240 of the upper layer through a threaded relationship.

[0036] In this embodiment, a second vibration damper 250 is further provided between the inner connecting member 230 and the outer connecting member 240, so that the inner end surface of the second vibration damper 250 is fitted to the outer end surface of the inner connecting member 230, and the outer end surface of the second vibration damper 250 is fitted to the inner end surface of the outer connecting member 240. By improving the shape of the second vibration damper 250, the inner and outer end surfaces thereof have a certain arc angle, so as to better fit the inner connecting member 230 and the outer connecting member 240, thereby reducing the influence of compression fatigue of the second vibration damper 250 on the bonding performance.

[0037] Specifically, the first vibration damping member 220 and the second vibration damping member 250 are both made by using an integrated molding technology of a polymer elastomer material, and have good elasticity, which can provide a better vibration damping effect between them and reduce the generation of noise.

[0038] In this embodiment, the vibrator ring unit 210 includes an upper shell 211 and a lower shell 212, and openings 213 are provided at the upper end of the lower shell 212 and the lower end of the upper shell 211, and then a accommodating cavity 217 is formed by covering the upper shell 211 on the lower shell 212, and a thread is provided at the lower end of the lower shell 212, and a thread matching the thread of the lower shell 212 is also provided on the upper shell 211, so that the upper shell 211 and the lower shell 212 are connected and fixed together through a threaded relationship, so that the accommodating cavity 217 forms a closed space.

[0039] Specifically, an external thread is provided on the outer end face of the lower shell 212, and an internal thread corresponding to the external thread of the lower shell 212 is provided on the inner end face of the upper shell 211, so that the upper shell 211 and the lower shell 212 can be connected and fixed together through a threaded relationship, thereby forming a closed space in the accommodating cavity 217.

[0040] A thread may also be provided on the inner end surface of the lower shell 212 , and a matching thread may be provided on the upper shell 211 , so that the lower shell 212 and the upper shell 211 can be connected and fixed together through a threaded relationship, thereby forming the accommodating chamber 217 into a closed space.

[0041] Specifically, by arranging the damping particles 300 and the buffer damping liquid 400 in the accommodating cavity 217 , the buffer damping liquid 400 is filled in the accommodating cavity 217 , and the damping particles 300 are placed in the buffer damping liquid 400 to achieve a vibration reduction effect.

[0042] In this embodiment, both the upper shell 211 and the lower shell 212 are provided with a fixing boss 214 extending toward the first vibration damper 220, and an inwardly recessed positioning groove is provided on the outer surface of the first vibration damper 220, so that the fixing boss 214 can be clamped in the positioning groove of the first vibration damper 220 to form a connected and fixed state.

[0043] Specifically, a first sealing ring 215 is provided between the fixed boss 214 extending from the upper shell 211 and the lower shell 212, so that the upper end surface of the first sealing ring 215 is in contact with the lower end surface of the fixed boss 214 of the upper shell 211, and the lower end surface of the first sealing ring 215 is in contact with the upper end surface of the fixed boss 214 of the lower shell 212, so that the two form a sealed state, thereby ensuring the sealing performance between the upper shell 211 and the lower shell 212.

[0044] Furthermore, a second sealing ring 216 is provided between the inner upper end surface of the upper shell 211 and the inner upper end of the lower shell 212, so that the upper end surface of the second sealing ring 216 is attached to the inner upper end surface of the upper shell 211, and the lower end surface of the second sealing ring 216 is attached to the opening 213 of the lower shell 212, thereby forming a sealed state between the upper shell 211 and the lower shell 212, achieving a second sealing effect, so that the vibrator ring unit 210 has multiple sealing protection effects.

[0045] In the present embodiment, the fixed shaft 100 is located at the center of the vibration isolation assembly 200 to play a supporting and stabilizing role, and can also improve the lateral stability of the vibration isolation assembly 200 and the compression deformation protection effect of the elastic member, so that the vibration isolation assembly 200 has good stability in use, and during the long-term use of the phononic crystal damper, the whole will be affected by the compression force, so that the overall height is reduced to be lower than the height of the fixed shaft 100. At this time, the fixed shaft 100 can play a good supporting and protective role.

[0046] The above are only preferred embodiments of the present invention, and only specifically describe the technical principles of the present invention. These descriptions are only for the purpose of explaining the principles of the present invention, and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanation here, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention, and other specific implementation methods of the present invention that can be associated with by technicians in this field without creative labor, should be included in the scope of protection of the present invention.

Claims

1. An improved damping phononic crystal isolator, comprising a fixed shaft and a vibration-damping assembly sleeved on the outer end thereof, characterized in that: The vibration damping assembly includes a vibrator ring unit, a first vibration damping member, an inner connecting member and an outer connecting member, the inner connecting member is arranged at the upper inner end of the outer connecting member, the first vibration damping member is arranged between the vibrator ring unit and the outer connecting member, the upper end surface of the inner connecting member is provided with a downwardly recessed annular mounting groove, the annular mounting groove is provided with an internal thread, the lower end of the outer connecting member is provided with a connecting convex ring matched with the annular mounting groove of the inner connecting member, the connecting convex ring is also provided with an external thread matched with its internal thread, the inner connecting member is connected and fixed together with the upper layer of the external connecting member through a threaded relationship.

2. The improved damping phononic crystal isolator according to claim 1, characterized in that: A second vibration damper is further provided between the inner connecting member and the outer connecting member, wherein the inner end surface of the second vibration damper is in contact with the outer end surface of the inner connecting member, and the outer end surface of the second vibration damper is in contact with the inner end surface of the outer connecting member.

3. The improved damped phononic crystal isolator according to claim 2, characterized in that: The first vibration damping member and the second vibration damping member are manufactured by using the polymer elastomer material integral molding technology.

4. The improved damped phononic crystal isolator according to claim 1, characterized in that: The vibrator ring unit comprises an upper shell and a lower shell. The upper end of the lower shell and the lower end of the upper shell are both provided with openings. The upper shell covers the lower shell to form a receiving cavity.

5. The improved damped phononic crystal isolator according to claim 4, characterized in that: The lower end of the lower shell is provided with a thread, and the upper shell is provided with a thread matching the thread of the lower shell. The upper shell and the lower shell are connected and fixed together through a thread relationship, so that the accommodating cavity forms a closed space.

6. The improved damped phononic crystal isolator according to claim 5, characterized in that: Damping particles and buffer damping liquid are arranged in the accommodating cavity. The buffer damping liquid is filled in the accommodating cavity, and the damping particles are placed in the buffer damping liquid to achieve a vibration reduction effect.

7. The improved damped phononic crystal isolator according to claim 4, characterized in that: The upper shell and the lower shell are both provided with a fixing boss extending toward the first vibration damper, and the outer surface of the first vibration damper is provided with an inwardly recessed positioning groove, and the fixing boss is clamped in the positioning groove of the first vibration damper to form a connected and fixed state.

8. The improved damped phononic crystal isolator according to claim 7, characterized in that: A first sealing ring is also provided between the fixed bosses extending from the upper shell and the lower shell, the upper end surface of the first sealing ring is attached to the lower end surface of the fixed boss of the upper shell, and the lower end surface of the first sealing ring is attached to the upper end surface of the fixed boss of the lower shell, so that the two form a sealed state.

9. The improved damped phononic crystal isolator according to claim 7, characterized in that: A second sealing ring is provided between the inner upper end surface of the upper shell and the inner upper end of the lower shell, the upper end surface of the second sealing ring is attached to the inner upper end surface of the upper shell, and the lower end surface of the second sealing ring is attached to the opening of the lower shell, so that a sealed state is formed between the upper shell and the lower shell.

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