CN112554360B - A self-reset and self-balancing inertial container based on a diamond-shaped transmission mechanism - Google Patents
A self-reset and self-balancing inertial container based on a diamond-shaped transmission mechanism Download PDFInfo
- Publication number
- CN112554360B CN112554360B CN202011370572.0A CN202011370572A CN112554360B CN 112554360 B CN112554360 B CN 112554360B CN 202011370572 A CN202011370572 A CN 202011370572A CN 112554360 B CN112554360 B CN 112554360B
- Authority
- CN
- China
- Prior art keywords
- self
- screw rod
- reset
- component
- balancing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
- E04H9/023—Bearing, supporting or connecting constructions specially adapted for such buildings and comprising rolling elements, e.g. balls, pins
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Environmental & Geological Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Vibration Prevention Devices (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Abstract
本发明涉及一种基于菱形传动的自复位自平衡式惯容器，包括丝杆、耗能组件、传动组件和复位组件，所述的传动组件为菱形传动组件，分别与耗能组件和复位组件连接，所述的耗能组件设置两组，分别套设于丝杆两端螺纹上，能够绕丝杆沿相反方向旋转，所述的复位组件包括弹簧，所述的弹簧分别与传动组件和丝杆连接，所述的丝杆上开设方向一致的螺纹，与现有技术相比，本发明具有整体性好、能够实现自平衡和复位且避免共振等优点。
The invention relates to a self-resetting and self-balancing inertial container based on diamond-shaped transmission, which comprises a screw rod, an energy consumption component, a transmission component and a reset component. The transmission component is a diamond-shaped transmission component, which is respectively connected with the energy consumption component and the reset component. There are two sets of the energy dissipation components, which are respectively sleeved on the threads at both ends of the screw rod and can rotate in opposite directions around the screw rod. The reset component includes a spring, and the spring is connected to the transmission component and the screw Compared with the prior art, the present invention has the advantages of good integrity, self-balancing and reset, and avoiding resonance.
Description
Technical Field
The invention relates to the field of vibration control of civil engineering structures, in particular to a self-resetting self-balancing inertial container based on a diamond transmission mechanism.
Background
In the field of civil engineering structures, the sources of vibration include natural factors such as earthquake, wind vibration and sea wave, and artificial factors such as transportation, machine operation and construction blasting. Although the sources of the various dynamic loads are different, the damage to the civil engineering structure is not insignificant. Serious vibrations can cause the room to collapse, the bridge fracture, casualties, and slight vibrations also can cause building fracture deformation, non-structural component damage etc. reduce sense of security and the comfort level of using. Regardless of the magnitude of the vibration, the vibration of the civil structure seriously threatens the life safety and the quality of life of people.
The vibration control device or mechanism is arranged in the structure, so that the vibration effect of the civil structure in the earthquake can be shared, the earthquake force born by the civil structure can be weakened, the damping and control force of the structure can be increased by adjusting the natural vibration frequency or period of the structure, the vibration response of the structure can be reduced, and the control of the structure vibration can be realized. At present, various types of inerter are being gradually applied to the field of vibration passive control of civil engineering structures mainly as a damping element of a tuned mass damper, and the inerter with the diamond configuration also has great advantages in the aspect of controlling interlayer displacement.
In recent years, attention in the industry is paid to a quick earthquake rehabilitation strategy for a structure, and a better method is provided for quickly improving the earthquake resistance of the structure by using a central energy dissipation component and a pure tension system. Therefore, the pure tension system based on the inhaul cable puts requirements on the overall, self-balancing and resettable performance of the damper.
Meanwhile, different requirements on the vibration acceleration and the vibration displacement are different aiming at different structures, and the main purpose is to ensure that the vibration acceleration under the action of the earthquake is far away from the earthquake acceleration as far as possible under the condition that the vibration displacement meets the requirements. Since the structures on which the device is installed may be distributed at different sites and may experience different seismic effects during the use of the structure, there is a need for an inerter device that can be adjusted according to the specific conditions of the structure.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a self-resetting self-balancing inertial container based on a diamond transmission mechanism, which has good integrity, can meet the requirements of self-balancing and resetting, and has adjustable rigidity.
The purpose of the invention can be realized by the following technical scheme:
a self-resetting self-balancing inertia container based on diamond transmission comprises a screw rod, energy consumption assemblies, transmission assemblies and reset assemblies, wherein the transmission assemblies are diamond transmission assemblies and are respectively connected with the energy consumption assemblies and the reset assemblies;
when the inerter is used, vibration is input from the transmission assembly, the transmission assembly transmits the vibration to the energy consumption assemblies and the reset assembly respectively, the energy of the vibration is consumed and self-balancing is achieved by the two groups of energy consumption assemblies through rotating on the screw rod in opposite directions, the spring in the reset assembly converts the energy of the vibration into elastic potential energy through deformation, and the energy consumption assemblies and the transmission assembly are reset by the elastic potential energy after the energy consumption assemblies complete energy consumption.
The stretching speed of the spring is different in each relative length, and the rotating speed of the flywheel is different, so that the rigidity of the whole inertia container is changed all the time, the rigidity is adjustable, the excellent period of vibration can be effectively avoided, and resonance is avoided.
Furthermore, the energy dissipation assemblies comprise flywheels and sliding nuts, the sliding nuts are respectively sleeved on threads of the screw rod, a mounting through hole is formed in the middle of each flywheel and sleeved on the screw rod and fixedly connected with the sliding nuts, the energy dissipation assemblies are symmetrically arranged at two ends of the screw rod, and the sliding nuts in the two groups of energy dissipation assemblies are respectively connected with the transmission assemblies.
Further, the transmission assembly include first connecting piece, second connecting piece and two terminals and four connecting rods, two terminals set up respectively in the symmetrical position at lead screw perpendicular bisector both ends, four connecting rods be used for the terminal at lead screw perpendicular bisector both ends and the slip nut interconnect at lead screw both ends, form the rhombus structure, the connecting rod pass through first connecting piece and slip nut swing joint, through second connecting piece and terminal swing joint, first connecting piece and slip nut between be connected through the bearing.
The vibration is input from the terminals, the distance between the two terminals and the inner angle of the diamond structure are changed, the connecting rod pushes the sliding nuts to the two sides of the screw rod through the first connecting piece respectively, the sliding nuts at the two ends rotate and translate in opposite directions under the action of the bearing and the screw rod respectively, the flywheel is driven to rotate and translate in opposite directions, the rotation of the flywheel and the sliding nuts realizes the consumption of vibration energy, and equivalent and opposite torsional moments are generated to act on the screw rod to realize self-balance.
Further, the subassembly that resets still include the slide, the slide fixed set up in the middle part of lead screw, the both ends of spring be connected with the terminal at lead screw plumb line both ends respectively, the middle part is fixed to be set up on the slide.
Furthermore, the two springs are arranged, the middle parts of the two springs are respectively and fixedly connected with the two sides of the sliding seat and respectively span across the two sides of the screw rod.
Preferably, the end parts of the two ends of the screw rod are respectively provided with a mounting hole for fixedly mounting the inertial container so as to adapt to different engineering requirements.
Preferably, the screw thread on the screw rod is divided into a left part and a right part, the strokes of the screw thread of the left part and the right part are equal, and a reserved unthreaded section is arranged between the screw thread of the left part and the screw thread of the right part.
Further preferably, the strokes of the left and right threads of the screw rod are set to 290mm, so that the stroke required by normal work is ensured.
Furthermore, the first connecting piece and the second connecting piece are connected with the connecting rod through hook rings or hinges, so that the relative displacement of the connecting rod, the terminal and the sliding nut is limited, but the relative angle is not limited, and the internal angle of the diamond structure can be freely changed.
Compared with the prior art, the invention has the following advantages:
1) the inerter adopts the transmission assembly with the rhombic structure, the vibration is respectively transmitted to the energy consumption assembly and the reset assembly, the two groups of energy consumption assemblies rotate in opposite directions and simultaneously absorb the vibration energy and keep self balance, after the vibration input is finished, the spring has the tendency of restoring the original position, so that the transmission assembly and the energy consumption assembly are restored to the condition before the vibration input, the original input vibration energy is utilized in the process, the reset is realized without external supply and restoring force, and thus, the inerter can be applied to a pure-tension system, and is installed by adopting the prestressed steel strand, the requirement on the support is not high, and the installation is convenient;
2) the sliding nuts and the flywheels at the two ends of the energy consumption assembly rotate and translate in opposite directions to each other, and generate equal and reverse torsional moment on the screw rod, so that the screw rod is integrally self-balanced, the self-balancing characteristic of the screw rod is compared with that of the traditional non-self-balancing screw rod, the position of the screw rod can be kept unchanged without the action of external torsional moment, the possibility that the screw rod is deformed too much or even damaged due to the fact that external action is considered and the external action can generate larger force on the screw rod is avoided, and the energy consumption assembly has the advantages of being high in safety, good in reliability, long in service life, suitable for various structural conditions, easy to install and the like;
3) the flywheel in the energy consumption assembly can greatly increase the apparent mass of the inertia container so as to absorb vibration energy, and can greatly increase the apparent mass of the structure under the condition of only increasing very small real mass, so that the natural frequency of the structure is reduced, a certain tuning effect is also achieved, and meanwhile, the flywheel sealing inertia is adopted, so that the mechanical friction and loss can be greatly reduced, the durability is good, the structure is greatly simplified, and the processing and the installation are convenient;
4) the relative distance between the flywheels at the two sides can be passively adjusted through the extension and contraction of the spring, so that different tuning effects are generated, the inertial capacitance of the device is further changed, the natural frequency of the structure can be adjusted, the resonance phenomenon is avoided, the device is suitable for different fields with different structures, and meanwhile, the initial state of the spring can be adjusted, so that a certain force effect is given to the structure initially, and the adjustment is convenient;
5) after the vibration input is finished, the spring can quickly restore the working state of the inertial container through the stored elastic force, so that the relative distance between the two terminals is restored to the condition before the vibration input, the durability and the engineering practicability of the damper are greatly improved, the original input vibration energy is utilized in the process, the external restoring force is not needed, the dissipation of the vibration energy is more favorable, and the displacement of the structure can be reduced, so that the device can be simultaneously suitable for the structures with requirements on vibration acceleration and vibration displacement;
6) due to the elastic expansion characteristic of the spring, the relative distance between the flywheels on the two sides is changed, so that the diamond configuration is changed, and the rigidity of the whole device is also changed. Meanwhile, the stretching speed of the spring is different in each relative length, and the rotating speed of the flywheel is different, so that the rigidity of the whole device is changed all the time, the excellent period of vibration can be effectively avoided, and resonance is avoided.
7) Compared with the existing disc type self-balancing inertial volume damper, the improved inertial volume damper with the diamond-shaped structure has the advantages of more integrated structure, better mechanical property and convenience in calculation and arrangement.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a lead screw, a slide and an energy dissipating assembly;
FIG. 3 is a schematic view of the lead screw and the slide mount;
FIG. 4 is a schematic view of a spring and terminal connection;
FIG. 5 is a schematic view of a flywheel configuration;
FIG. 6 is a schematic view of the slip nut and first connector installation;
FIG. 7 is a schematic structural view of a terminal;
FIG. 8 is a schematic view of a connecting rod structure;
fig. 9 is an enlarged view of the end of the link.
The device comprises a screw rod 1, a screw rod 21, a spring 22, a sliding seat 31, a flywheel 32, a sliding nut 41, a terminal 42, a connecting rod 43, a first connecting piece 44 and a second connecting piece.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.
Examples
As shown in fig. 1-4, the invention provides a self-resetting self-balancing inertial container based on diamond transmission, which comprises a screw rod 1, an energy consumption component, a transmission component and a resetting component, wherein the transmission component is a diamond transmission component and is respectively connected with the energy consumption component and the resetting component, and the energy consumption component is sleeved on threads at two ends of the screw rod 1 and can rotate around the screw rod 1 in opposite directions.
The screw rod 1 is provided with threads in the same direction, the end parts of the two ends of the screw rod are respectively provided with mounting holes, the threads on the screw rod 1 are divided into a left part and a right part, the strokes of the threads of the left part and the right part are equal, and the threads are both set to be 290 mm.
The energy dissipation assemblies comprise flywheels 31 and sliding nuts 32, the sliding nuts 32 are respectively sleeved on threads of the screw rod 1, mounting through holes are formed in the middles of the flywheels 31 and are sleeved on the screw rod 1 and fixedly connected with the sliding nuts 32, two groups of energy dissipation assemblies are arranged and are respectively symmetrically arranged at two ends of the screw rod 1 and are mutually connected, and the sliding nuts 32 in the two groups of energy dissipation assemblies are respectively connected with the transmission assembly.
The transmission assembly comprises a first connecting piece 43, a second connecting piece 44, two terminals 41 and four connecting rods 42, the two terminals are respectively arranged at the symmetrical positions at the two ends of the perpendicular bisector of the screw rod 1, the four connecting rods 42 are used for connecting the terminals 41 at the two ends of the perpendicular bisector of the screw rod 1 and the sliding nuts 32 at the two ends of the screw rod 1 mutually to form a diamond structure, the connecting rods 42 are movably connected with the sliding nuts 32 through the first connecting piece 43 and the second connecting piece 44 and the terminals 43, and the first connecting piece 43 is connected with the sliding nuts 32 through bearings.
Reset assembly includes spring 21 and slide 22, and slide 22 is fixed to be set up in the middle part of lead screw 1, and the both ends of spring 21 are connected with the terminal 41 at lead screw 1 perpendicular bisector both ends respectively, and the middle part is fixed to be set up on slide 22, and spring 21 sets up two, and the middle part of two springs is pasted respectively in the both sides of slide 22, strides across the both sides of lead screw 1 respectively.
When the inerter is used, vibration is input from the terminals 41 of the transmission assembly, the distance between the two terminals 41 and the inner angle of the diamond structure are changed, the sliding nuts 32 are respectively pushed to the two sides of the screw rod 1 by the connecting rod 42 through the first connecting piece 43, the sliding nuts 32 at the two ends respectively rotate and translate in opposite directions under the action of the bearing and the screw rod 1, the flywheel 31 is driven to rotate and translate in opposite directions, the rotation of the flywheel 31 and the sliding nuts 32 realizes the consumption of vibration energy, and equivalent and opposite torsional moments are generated to act on the screw rod 1 to realize self balance; the spring 21 in the reset assembly converts the energy of vibration into elastic potential energy by generating deformation, and the energy consumption assembly and the transmission assembly are reset by utilizing the elastic potential energy after the energy consumption assembly finishes energy consumption.
As shown in fig. 5 and 6, the flywheel 31 is provided with a middle through hole, the diameter of the middle through hole is larger than that of the screw rod 1, so that the flywheel 31 does not contact with the screw rod 1 in the rotating process, the outer side of the middle through hole is respectively provided with a plurality of mounting holes, the sliding nut 32 is formed by connecting a mounting plate and a cylinder, an internal thread is arranged in the cylinder, the middle of the mounting plate is provided with a threaded hole which is matched with the internal thread of the cylinder, the mounting plate is also provided with through holes which correspond to the mounting holes of the flywheel 31 and are used for fixedly connecting the sliding nut 32 and the flywheel 31, and the first connecting piece 43 is sleeved on the outer side of the cylinder part of the sliding nut 32 through a bearing and is connected with the connecting rod 42 through a hook ring or a hinge.
As shown in fig. 7, the terminal 41 is formed by connecting a circular truncated cone and a cylinder, a through hole is formed at the joint of the circular truncated cone and the cylinder, two small cylinders are arranged at the bottoms of the cylinders, two springs 21 are respectively installed on the two small cylinders, a second connecting piece 44 is sleeved on the side surface of the cylinder, and the second connecting piece 44 is connected with the connecting rod 42 through a hook ring or a hinge.
As shown in fig. 8 and 9, the link 42 includes a central elongated rod and two end portions that mate with first and second connectors 43 and 44 and are connected by a hook and loop or hinge.
While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and those skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011370572.0A CN112554360B (en) | 2020-11-30 | 2020-11-30 | A self-reset and self-balancing inertial container based on a diamond-shaped transmission mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011370572.0A CN112554360B (en) | 2020-11-30 | 2020-11-30 | A self-reset and self-balancing inertial container based on a diamond-shaped transmission mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112554360A CN112554360A (en) | 2021-03-26 |
| CN112554360B true CN112554360B (en) | 2021-10-08 |
Family
ID=75045233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011370572.0A Active CN112554360B (en) | 2020-11-30 | 2020-11-30 | A self-reset and self-balancing inertial container based on a diamond-shaped transmission mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112554360B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118686888B (en) * | 2024-06-25 | 2024-12-13 | 华南农业大学 | Nonlinear stiffness vibration damper with inertial volume amplifying effect and using method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI261081B (en) * | 2004-07-13 | 2006-09-01 | Deh-Shiu Hsu | An assembling mechanism of a damper |
| CN207829201U (en) * | 2017-12-18 | 2018-09-07 | 安徽工程大学 | A kind of friction energy-dissipating damper with function of displacement amplification |
| CN108915114A (en) * | 2018-07-19 | 2018-11-30 | 河北地质大学 | A kind of anti-buckling steel of pulling type-damper support |
| CN109853764A (en) * | 2019-01-30 | 2019-06-07 | 同济大学 | It is used to hold damper using the self-balancing type of reciprocating screw rod |
| CN209874124U (en) * | 2019-01-30 | 2019-12-31 | 同济大学 | Self-balancing inertial damper with positive and negative screw rods |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200918788A (en) * | 2007-10-26 | 2009-05-01 | Univ Nat Taiwan | Screw-type inerter mechanism |
-
2020
- 2020-11-30 CN CN202011370572.0A patent/CN112554360B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI261081B (en) * | 2004-07-13 | 2006-09-01 | Deh-Shiu Hsu | An assembling mechanism of a damper |
| CN207829201U (en) * | 2017-12-18 | 2018-09-07 | 安徽工程大学 | A kind of friction energy-dissipating damper with function of displacement amplification |
| CN108915114A (en) * | 2018-07-19 | 2018-11-30 | 河北地质大学 | A kind of anti-buckling steel of pulling type-damper support |
| CN109853764A (en) * | 2019-01-30 | 2019-06-07 | 同济大学 | It is used to hold damper using the self-balancing type of reciprocating screw rod |
| CN209874124U (en) * | 2019-01-30 | 2019-12-31 | 同济大学 | Self-balancing inertial damper with positive and negative screw rods |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112554360A (en) | 2021-03-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2732106B1 (en) | Passive damper | |
| CN107604810A (en) | A kind of Self-resetting friction pendulum three-dimensional shock damping and insulation bearing | |
| CN205298367U (en) | Generator system damping device | |
| WO1997025550A2 (en) | Energy absorber | |
| CN101575882A (en) | Mixed type shape memory alloy multi-dimensional vibration isolator | |
| TWI862846B (en) | Damper and damper system for damping relative lateral movement between a tensioned cable and a support structure | |
| CN106836543A (en) | The adjustable passive negative stiffness damper of series mechanism | |
| CN106381933B (en) | An anti-overturning composite spring three-dimensional shock-isolation bearing | |
| CN204187234U (en) | A kind of paralleling mechanism vibration isolation and displacement protecting device | |
| CN106968499A (en) | A kind of level of subsidiary vertical shock-absorbing function is to negative stiffness device | |
| JP6902191B2 (en) | Damping device and seismic isolation structure | |
| CN209482155U (en) | A function-separated self-resetting shock-absorbing bridge | |
| CN112095833A (en) | Variable-rigidity friction damper | |
| CN110965462B (en) | A seismic isolation support with air damping tube | |
| CN112554360B (en) | A self-reset and self-balancing inertial container based on a diamond-shaped transmission mechanism | |
| CN107514069A (en) | Low frequency marmem intelligent Nonlinear tuned mass damper and preparation method thereof | |
| EP2227606A1 (en) | Tuned mass damper | |
| CN110319136A (en) | A kind of damper | |
| CN110792030A (en) | A metal-rubber-based bridge shock absorber and its working method | |
| CN106639022A (en) | Novel nonlinear earthquake reduction device | |
| CN108035598B (en) | Semi-active/passive hybrid damping device | |
| CN107504115A (en) | A kind of three-dimensional frequency-adjustable bump leveller | |
| CN110397175A (en) | A kind of SMA negative stiffness damping device | |
| CN106369103B (en) | Bearing device for damping system of electrical equipment | |
| CN211395323U (en) | Bridge shock absorber based on metal rubber |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |